|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Basic Lithofacies-Succession Model for the Wumishan Cyclothems: Their Markov Chain Analysis and Regularly Vertical Stacking Patterns in the Third-Order Sequences显示文摘The Mesoproterozoic Wumishan Formation in the Jixian section ofTianjin is a succession of 3300-m-thick carbonate strata formed in a period of about 100 Ma (1310 ± 20 Ma-1207 ± 10 Ma). In this succession of strata, the carbonate metre-scale cyclic sequences belonging to peritidal type with an approximately symmetrical lithofacies succession are best developed. The wide development of 1:4 stacking patterns shows that these metre-scale cyclic se quences are genetically related to the short-eccentricity cycles, which are called the Wumishan cyclothems that could truly represent sedimentary cycles. Generally, massive and thick-bedded calcareous dolomites and dolomitic limestones of stromatolite biostromes and thrombolite bioherms constitute the central part of the Wumishan cyclothems. The lower and upper parts consist of tidal flat dolostones, sandy-muddy dolostone and the top part is composed of lagoonal facies dolo mitic shales with a paleosol cap. Therefore, an approximately symmetrical lithofacies-succession is formed. Many features such as the clear deepening and shoaling vectors of cyclothems, and all kinds of marks of fresh-water diagenesis indicate that the Wumishan cyclothems are the product of autocyclic sedimentation governed by allocyclic high-frequency sea level changes. The results of a Markov chain analysis reaffirm the existence of the lithofacies-succession model of the Wumishan cyclothems. The boundaries of the Wumishan cyclothems are marked by the instantaneous exposed punctuated surface, which leads to the discrepancy between the cyclothems and the parasequences of the sequence stratigraphy ter minology system. It is difficult to form a judgment that the time span of the Milankovitch cycles in the Precambrian is certainly equal to that of the Phanerozoic, but the regularly vertical stacking patterns of the seventh-order rhythms, sixth order cyclothems and fifth-order parasequence sets still indicate their consistency with the duration of the Milankovitch cycles in the Phanerozoic. | MEI Mingxiang, MA Yongsheng and GUO Qingyin Institute of Earth Sciences and Natural Resources, China University of Geosciences, Beijing 100083 China Petrochemical Corporation (SINOPEC), Beijing 100029 | 2001 | Acta Geologica Sinica(English Edition)2001，75，4： | 19 |
| 2 | Genetic Types of Meter-Scale Cyclic Sequences and Fabric Natures of Facies Succession显示文摘Different genetic types of meter-scale cyclic sequences in stratigraphic records result from episodic accumulation of strata related to Milankovitch cycles. The distinctive fabric natures of facies succession result from the sedimentation governed by different sediment sources and sedimentary dynamic conditions in different paleogeographical backgrounds, corresponding to high-frequency sea-level changes. Naturally, this is the fundamental criterion for the classification of genetic types of meter-scale cyclic sequences. The widespread development in stratigraphic records and the regular vertical stacking patterns in long-term sequences, the evolution characters of earth history and the genetic types reflected by specific fabric natures of facies successions in different paleogeographical settings, all that show meter-scale cyclic sequences are not only the elementary working units in stratigraphy and sedimentology, but also the replenishment and extension of parasequence of sequence stratigraphy. Two genetic kinds of facies succession for meter-scale cyclic sequence in neritic-facies strata of carbonate and clastic rocks, are normal grading succession mainly formed by tidal sedimentation and inverse grading succession chiefly made by wave sedimentation, and both of them constitute generally shallowing upward succession, the thickness of which ranges from several tens of centimeters to several meters. The classification of genetic types of meter-scale cyclic sequence could be made in terms of the fabric natures of facies succession, and carbonate meter-scale cyclic sequences could be divided into four types: L-M type, deep-water asymmetrical type, subtidal type and peritidal type. Clastic meter-scale cyclic sequences could be grouped into two types: tidal-dynamic type and wave-dynamic type. The boundaries of meter-scale cyclic sequences are marked by instantaneous punctuated surface formed by non-deposition resulting from high-frequency level changes, which include instantaneous exposed punctuated surface, drowned punctuated surface as well as their relative surface. The development of instantaneous punctuated surface used as the boundary of meter-scale cyclic sequence brings about the limitations of Walter’s Law on the explanation of facies distribution in time and space, and reaffirm the importance of Sander’s Rule on analysis of stratigraphic records. These non-continuous surface could be traced for long distance and some could be correlative within same basin range. The study of meter-scale cyclic sequences and their regularly vertical stacking patterns in long-term sequences indicate that the research into cyclicity of stratigraphic records is a useful way to get more regularity from stratigraphic records that are frequently complex as well as non-integrated. | Mei Mingxiang Xu Debin Zhou Hongrui Institute of Earth Sciences and Natural Resources, China University of Geosciences, Beijing 100083 | 2000 | Journal of Earth Science2000，19，4： | 12 |
| 3 | Fischer Plots of Wumishan Cyclothems,Precambrian Records of Third-OrderSea-Level Changes显示文摘The Mesoproterozoic Wumishan Formation ((1310 ± 20 ) Ma - (l 207 ± 10) Ma) in Jixian, Tianjin represents a succession of 3 300 meter thick carbonate strata where are the best developed stromatolite biostromes and thrombolite bioherms. These biostromes and bioherms, together with tidal-flat dolomites and muddy dolostones, form Wumishan cyclothems with approximately symmetrical faciessuccession fabrics, which belong to carbonate meter-scale cyclic sequences of peritidal type. These cyclothems are overlain by lagoon dolomitic mudstones and shales and by frequently developed paleosol layers, indicating that the boundary of Wumishan cyclothems is marked by an instantaneously-exposed punctuated surface. Viewed form the regularly vertical stacking patterns of Wumishan cyclothems in long-term sequences, 26 third-order sequences may be discerned in Wumishan Formation. These thirdorder sequences may also be incorporated into six second-order sequences. In order to study the variation range of third-order sea-level changes and the formation period of third-order sequence, 626 cyclothems are discerned in the middle and upper parts of Wumishan Formation where the outcrops are well developed. In terms of the total thickness and the formation period of Mesoproterozoic Wumishan Formation, the crust subsidence rate in the sedimentary period of Wumishan Formation is supposed to be 3 meters at each interval of 100 thousands years. Based on this assumption, Fischer plot might be designed to simulate the third-order sea-level changing pattern. | Mei Mingxiang Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083 Ma Yongsheng China Petrochemical Corporation (SINOPEC), Beijing 100029 Zhou Hongrui Du Benming Luo Zhiqing Guo Qingyin Faculty of Earth Sc | 2001 | Journal of China University of Geosciences2001，12，1： | 11 |
| 4 | The Late Triassic Sequence-Stratigraphic Framework of the Upper Yangtze Region,South China显示文摘In the transitional period between the Middle and the Late Triassic, the Indochina orogeny caused two tectonic events in South China:(1) the formation and uplift of the Qinling-Dabie orogenic belt along the northern margin of the South China Plate, due to its collision with the North China Plate; and 2) the development of a 1300-km-wide intra-continental orogen in the southeastern part of the South China Plate, which led to a northwestward movement of the foreland thrust-fold zone. These tectonic events resulted in the ending of the Yangtze Platform, and were a stable paleogeographic factor from the Eidacaran to the end of the Middle Triassic. This platform was characterized by the widespread development of shallow-water carbonates. After the end of the Yangtze Platform, the upper Yangtze foreland basin(or Sichuan foreland basin) was formed during the Late Triassic and became a accumulation site of fluvial deposits that are composed of related strata of the Xujiahe Formation. In western Sichuan Province, the Xujiahe Formation overlies the Maantang Formation shallow-water carbonate rocks of the Xiaotangzi Formation siliciclastic rocks(from shelf shales to littoral facies). The sequence-stratigraphic framework of the Upper Triassic in the upper Yangtze foreland basin indicates a particular alluvial architecture, characterized by sequences composed of(1) successions of low-energy fluvial deposits of high-accommodation phases, including coal seams, and(2) high-energy fluvial deposits of low-accommodation phases, including amalgamated river-channel sandstones. The spatial distribution of these fluvial deposits belonging to the Xujiahe Formation and its relative strata is characterized by gradual thinning-out, overlapping, and pinching-out toward both the east and south. This sedimentary record therefore expresses a particular sequence-stratigraphic succession of fluvial deposits within the filling succession of the foreland basin. The sequence-stratigraphic framework for the Upper Triassic in the Upper Yangtze region provides a record of the end of the Yangtze Platform and the formation of the upper Yangtze foreland basin. | MEI Mingxiang LIU Shaofeng | 2017 | Acta Geologica Sinica(English Edition)2017，91，1： | 11 |
| 5 | Sedimentary Features and Implications for the Precambrian Non-stromatolitic Carbonate Succession:A Case Study of the Mesoproterozoic Gaoyuzhuang Formation at the Qiangou Section in Yanqing County of Beijing显示文摘摘要:在长前寒武纪的时期, stromatolitic 碳酸盐继任是很普通的。然而,由 subtidal 存款是显著的 non-stromatolitic 碳酸盐继任显示出一个鲜明对比到 stromatolitic 碳酸盐继任。non-stromatolitic 和 stromatolitic 碳酸盐继任是为演变碳酸盐世界的进一步的理解的重要线索前寒武纪。在在北京的西北的郊区的 Qiangou 节的 Mesoproterozoic Gaoyuzhuang 形成是能被划分成四个成员的一套超过 1000 个 m 厚的碳酸盐阶层(或 subformations ) ,在哪个 stromatolites 的缺乏标记的 non-stromatolitic 碳酸盐继任完成形成的第三个成员。这 non-stromatolitic 碳酸盐继任能进一步被细分进由沉积外形的常规继任是显著的三个第三顺序的序列。在第三顺序的序列,由中等床的 leiolite 石灰石和薄床的泥土组成的很多 subtidal 碳酸盐米规模周期组成他们的 transgressive 系统道( TST )和早高看台的系统道( EHST ),薄床的石灰石和泥土完成的很多米规模周期组成他们的压缩的节( CS ),并且对白云石完成晚高看台的系统道( LHST )的巨大的含白云石的石灰石或石灰厚床。特别地在 Qiangou 节完成 Mesoproterozoic Gaoyuzhuang 形成的第三个成员的 non-stromatolitic 碳酸盐继任可能是 non-stromatolitic 碳酸盐继任的代表因为它的特殊 lithological 特征和详细规格前寒武纪沉积结构,并且它的一般沉积特征对sophisticate 和 Precambri 的演变碳酸盐世界的进化规则的进一步的理解有用、有意义Gaoyuzhuang 形成的时间规模从 1600 妈作为那被推出到 1400 妈;因此,完成 Gaoyuzhuang 形成的第三个成员的沉积继任可以表明的 non-stromatolitic 发生在 ca 的一个 stromatolite 衰落事件。1450 妈原生地,除另外的三个事件以外,那在 ca 分别地发生了。2000 妈, ca。1000 妈和 ca。675 妈。Gaoyuzhuang 形成的第三个成员的沉积继任能通常是的这 non-stromatolitic 的形成的持续时间在北美洲与类似的沉积继任相关,即 non-stromatolitic 带超群的海伦娜形成的沉积继任,它建议 stromatolite 衰退发生在 ca。1450 妈可能是一个全球事件。因此,沉积继任在纸讨论了的 non-stromatolitic 为碳酸盐 sedimentology 的进一步的理解在提供一个重要例子前寒武纪。 | MEI Mingxiang | 2008 | Acta Geologica Sinica(English Edition)2008，82，2： | 10 |
| 6 | Thermodynamic conditions of framework grain dissolution of clastic rocks and its application in Kela 2 gas field显示文摘Feldspar and clastic debris are the most important constituent framework grains of sedimentary clastic rocks and their chemical dissolution plays an essential role in the formation and evolution of the secondary pore in the reservoir rocks. On the basis of thermodynamic phase equilibrium, this study investigates the chemical equilibrium relationships between fluid and various plagioclase and K-feldspar in diagenesis of the sediments, particularly, the impact of temperature and fluid compositions (pH, activity of K+, Na+, Ca2+ and so on) on precipitation and dissolution equilibria of feldspars. Feldspar is extremely easily dissolved in the acid pore water with a low salinity when temperature decreases. The dissolution of anorthite end-member of plagioclase is related to the Ca content of the mineral and the fluid, higher Ca either in the mineral or in the fluid, easier dissolution of the feldspar. Moreover, the dissolution of albite end-member of plagioclase is related to Na of both the mineral and fluid, lower Na out of both the mineral and fluid, easier dissolution of the mineral. Similarly, lower-K fluid is more powerful to dissolve K-feldspar than the higher. The anorthite component of plagioclase is most easily dissolved in ground water-rock system, the albite is the secondary, and K-feldspar is the most stable. Selective dissolution of plagioclase occurs in diagenesis because of the plagioclase solid solution that is mainly composed of albite and anorthite end-members, Ca-rich part of which is preferentially dissolved by the pore water, in contrast to the Na-rich parts. Based on investigation of reservoir quality, secondary pore, dissolution structures of feldspar, clay minerals and ground water chemistry of the Kela 2 gas field of Kuqa Depression in the Tarim basin of Western China, we discovered that the secondary pore is very well developed in the highest quality section of the reservoir, and the plagioclase of which was obviously selectively dissolved, in contrast to the overgrowth of K-feldspar. Chemistry of the ground water out of the highest quality section of the reservoir is consistent with the complete dissolution field of anorthite, partial dissolution field of albite component of plagioclase, and the precipitation of K-feldspar on the temperature-logK phase equilibrium diagram drawn from this study. The thermodynamic modeling calculation gave us an insight into formation of the secondary pore within the reservoir, and the dissolution of plagioclase an important cause of the secondary pore. It is assumed that the solvent to dissolve the plagioclase frame grains originated from the origin-enriched compacted fluid acids out of the mudstone buried beneath the top of geopressured zones in the Kuqa Depression. | LAI Xingyun, YU Bingsong, CHEN Junyuan, CHEN Xiaolin, LIU Jianqing, MEI Mingxiang, JING Weiguang & CHENG Suhua School of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China Key Laboratory of Lithospheric Tectonics, Deep-level Process and Exploration of Ministry of Education, Beijing 100083, China | 2005 | Science China Earth Sciences2005，48，1： | 9 |
| 7 | Sequence-stratigraphic frameworks and their palaeogeographic patterns for the Permian Lopingian of the Dianqiangui Basin and its adjacent areas of Southwestern China显示文摘The Permian Lopingian in the Dianqiangui Basin and its adjacent areas is marked by the coal measures of the Wuchiapingian and the carbonate strata of the Changhsingian stages. For the Lopingian of the Dianqiangui Basin and its adjacent areas,the diversity of sedimentary facies and the obviousness of facies change provide an advantaged condition on a study of sequence stratigraphy. Approximately,the Wuchiapingian stage constitutes a third-order sequence and the Changhsingian stage forms an-other. For the Wuchiapingian stage in the study area,coal-measures were developed on the attached platform and,in addition,a special coal-measure that is composed of both limestone beds and coal beds was also developed in the central part of some isolated platforms. Grain-bank grainstones and packstones were formed on the margin of the attached platform as well as in the windward part of iso-lated platforms. For the Changhsingian stage in the study area,open-platform limestones were formed on the attached platform,while sponge-reef limestones were developed both on the margin of the at-tached platform and on the isolated platforms. The Lopingian Series is a set of basin-facies muddy shales with interbeds of silicalites in the inter-platform basin,which appears a set of the large-thick coarse clastic strata of molasses covering direct the deep-water strata from the Devonian to the Per-mian Yangsingian in the Qinzhou-Fangcheng region in the southern part of the study area. All of these features indicate the complexity of temporal-spatial facies-changes. Sequence-stratigraphic frame-works could be established,which would illustrate two types of facies-changing surfaces and dia-chronisms in the stratigraphic records,based on the combination of both biostratigraphic and chronostratigraphic materials and the regularity reflected by temporal evolutionary succession of sediments as well as spatial distributional patterns of sedimentary facies. Ultimately,features of sedi-mentary succession and palaeogeographical evolution of the Permian Lopingian in the study area are revealed clearly in a series of the panel diagrams of sequence-stratigraphic frameworks and the outline maps showing the sedimentary-facies and palaeogeography. The Permian Lopingian formed by two third-order sequences differs from the stratigraphy of the same era characterized by the constant re-gression along Euramerica. Most specially,if the end-Guadalupian mass-extinction event is genetically related to a regressive event represented by the unconformity of the first episode of the Dongwumovement in the study area,the mass-extinction event at the turn from the Permian to the Triassic is genetically related to a rapid transgressive event re-flected by the drowning unconformity in the study area. These phenomena might reveal a complex rela-tionship between mass-extinction events and trans-gressive-regressive events. | MEI MingXiang MA YongSheng DENG Jun CHU HanMin ZHENG KuanBing | 2007 | Science China Earth Sciences2007，50，6： | 8 |
| 8 | Sedimentary Features and Their Implications of Microdigital Stromatolites from the Mesoproterozoic Wumishan Formation at the Jixian Section in North China显示文摘在在天津的 Jixian 节的 Mesoproterozoic Wumishan 形成是一套超过 3000-m-thick stromatolitic 碳酸盐继任。在这继任,几个岩相单位,也就是说 subtidal stromatolitic biostrome, thrombolitic bioherm,潮汐公寓的 micritic 白云石和泻湖含白云石的页岩,当 Wumishan 骑车,完成被提名了的 peritidal 碳酸盐类型的许多米规模周期。重要地,许多 microdigital stromatolites 在 Wumishan 形成的更低的部分完成 Wumishan 周期的 stromatolitic biostrome 单位。这些 microdigital stromatolites 被古生物学家作为一个 stromatolitic 集合组织了,也就是说 Pseudogymnosolen mopanyuensis-Scuphus-Yangzhuang columnaris 集合。当霰石(石灰华) 海地板由 sedimentologists 猛抛,这些 microdigital stromatolites 也被解释了,并且进一步从海地板霰石作为过渡时期的特殊产品被认为猛抛对 Neoproterozoic 的碎屑状、泥泞的碳酸盐太古代。尽管为 stromatolitic 集合的概念的 stratigraphic 意思有一些限制,由古生物学家的分类上的详细研究提供重要线索理解 microdigital stromatolites 的 sedimentological 意思。而且,为 microdigital stromatolites 的结束的一根重要、明显的地平线在 Jixian 节在 Mesoproterozoic Wumishan 形成被记录,它提供有用信息理解 stromatolite 衰落发生在 c.1250 妈和演变碳酸盐世界前寒武纪。 | MEI Mingxiang GAO Jinhan MENG Qingfen LIU Zhirong | 2010 | Acta Geologica Sinica(English Edition)2010，84，3： | 8 |
| 9 | Facies-succession and architecture of the third-order sequences and their stratigraphic framework of the Devonian in Yunnan-Guizhou-Guangxi area,South China显示文摘The Caledonian orogeny at the end of the Silurian resulted in great changes in the palaeogeography in the Yunnan-Guizhou-Guangxi area of South China; the continental area of the Early Paleozoic evolved into the extensive Dian-Qian-Gui Sea in the Late Paleo-zoic. Early in the Devonian, as a result of a major transgression, seawater encroached gradually from the south to the north and clastic facies were deposited. Carbonate deposition was then established in the Yunnan-Guizhou-Guangxi area, with a palaeogeography marked by attached platforms, isolated platforms and narrow basins. As a result of the Ziyun movement towards the end of the Devonian, the Upper Devonian strata are regressive and thin out from the open-sea to the land areas. A study of the nature and distribution of sedimentary facies in space and time recognises 13 third-order sequences in the Devonian strata in Yunnan-Guizhou-Guangxi area, and these form two second-order sequences. The strata of the Lower Devonian comprise 5 third-order sequences (SQ1 to SQ5 ), which are dominated by transgressive clastics. 4 third-order sequences (SQ6 to SQ9 ) in the Middle Devonian are characterized by alternations of transgressive clastics and highstand carbonates. In the Upper Devonian, carbonates constitute 4 third-order sequences (SQ10 to SQ13 ), which are generally marked by the transgressive limestones and highstand dolomites. On the basis of earlier biostratigraphic studies, sea-level changes represented by the third-order sequences with their different facies successions are explored, and the sequence stratigraphic framework is established. There-fore, the Devonian strata in the study area provide an example for further understanding of depositional trends within the sequence-stratigraphic framework. | Mei Mingxiang Maurice E.Tucker | 2013 | Journal of Palaeogeography2013，2，1： | 6 |
| 10 | From Basin Black Shales to Platform Carbonate Rocks:A Study on Sequence Stratigraphy for the Lower Cambrian of the Upper-Yangtze Region in South China显示文摘在 Upper-Yangtze 区域,特别在贵州省和它的邻近的区域,更低寒武纪很好被开发并且由从盆外形的黑页岩的继任是显著的焦化站台外形的岩石。从 Sinian 发生在拐弯到的站台的淹死的事件寒武纪导致了一套黑页岩,即 Niutitang 形成,它完成底部部分更低寒武纪。与沉积环境变浅,一套碳酸盐摇,即 Qingxudong 形成,在最高的部分被形成更低寒武纪。因此,更低在学习区域寒武纪使能进一步的一个秒顺序序列起来细分进五个第三顺序的序列,并且形成违反回归的定期周期的继任。为在秒顺序顺序的第三顺序的序列有一个定期垂直的叠模式。从底部到顶,继任“ CS (压缩的节)+HST (高看台的系统道) ”第三顺序的序列被变成继任“ TST (transgressive 系统道)+CS+HST' 。相应地,淹死类型顺序边界被变成暴露类型那条。因此,秒顺序和第三顺序的序列有类似的沉积外形的体系结构。有这些时间的变化的伴随物,更低与包含五个第三顺序的序列的 1000 m 的厚度寒武纪被变成不能与加深沉积环境向东南识别第三顺序的序列的压缩继任。根据第三顺序的序列的基本特征,即整齐 o 在空间和沉积环境的变化的同步性的沉积外形的继任及时,在在不同 paleogeographical 背景的主要的记载的节的第三顺序的序列的详细部门成为基础建立能在 stratigraphic 记录表明改变外形的表面的二种类型和 diachronism 的二种类型的 sequence-stratigraphic 框架。这个 sequence-stratigraphic 框架从盆外形的黑页岩形成的压缩继任的库显示出碳酸盐平台的成长进程。从 Sinian 在拐弯源于快速的违反到寒武纪生态的空间变得开,它形成了为“寒武纪的生物爆炸”设定的 paleogeographical 的先前的条件。最终,在 depositional 事件之间的基因关系和生物差异的事件是很复杂的并且在那里仍然是以后需要推进研究的大量问题。 | MEI Mingxiang MA Yongsheng ZHANG Hai MENG Xiaoqing CHEN Yonghong | 2007 | Acta Geologica Sinica(English Edition)2007，81，5： | 6 |
| 11 | Milankovitch-driven cycles in the Precambrian of China:The Wumishan Formation显示文摘Carbonate strata of the Mesoproterozoic Wumishan Formation in the Jixian area near Tianjin are ~3300 m thick and were deposited over some 100 million years(from ~1310±20 Ma to ~1207±10 Ma).Metre-scale cycles(parasequences) dominate the succession.They are generally of the peritidal carbonate type,and mostly show an approximately symmetrical lithofacies succession with thick stromatolite biostromes and small thromboliteoncolite bioherms constituting the central part and tidal-flat dolomites forming the upper and lower parts.Lagoonal-supratidal dolomitic shales with palaeosol caps make up the topmost layers.The boundaries of the Wumishan cycles are typically exposure surfaces,and there is abundant evidence for fresh-water diagenesis.Widespread 1:4 stacking patterns indicate that the individual Wumishan cycles are sixthorder parasequences,with 4 parasequences constituting one fifth-order parasequence set.Locally,5-8 beds or couplets,can be discerned in some of the cycles.The regular vertical stacking pattern of beds within the sixth-order parasequences,forming the fifth-order parasequence sets,are interpreted as the result of environmental fluctuations controlled by Milankovitch rhythms,namely the superimposition of precession,and short and long-eccentricity.The widespread 1:4 stacking pattern in the cyclic succession,as well as the local 1:5-8 stacking patterns of the beds within the cycles,suggest that the Milankovitch rhythms had similar ratios in the Mesoproterozoic as in the Phanerozoic.Based on the cycle stacking patterns,26 thirdorder sequences can be distinguished and these group into 6 second-order,transgressiveregressive megasequences(or sequence sets),all reflecting a composite,hierarchical succession of relative sea-level changes. | Mei Mingxiang Maurice E. Tucker | 2013 | Journal of Palaeogeography2013，2，4： | 3 |
| 12 | Giant Induan oolite:A case study from the Lower Triassic Daye Formation in the western Hubei Province,South China显示文摘大多数 Phanerozoic 鲕状岩被 ooids 与一条直径标记不到 2 公里。Neoproterozoic 鲕状岩上的观察导致了概念的一个变化。传统地与超过 2 公里的一种谷物尺寸指了鲕状岩的术语豆石,限制为那些涂的碳酸盐谷物的现在被 meteoritic 形成淡水成岩作用;有超过 2 公里的一种谷物尺寸的鲕状岩现在被定义为巨大。在有在顶的超过 40 m 的厚度的一套鲕状银行的石灰石以内的特别不平常的巨大的鲕状岩分开更低三叠纪( Induan )在在在华南的湖北省的西方的部分的 Lichuan 节的 Daye ( Ruiping )形成,在特定的地质的时期和与结束有关的地质的背景代表重要 sedimentological 现象--二叠的生物集体扑灭。象 Neoproterozoic 的巨大的鲕状岩一样代表鲕状岩在那个特殊地质的时期在一个广阔低角度的碳酸盐斜面形成了的存款,因为他们提供一个比较例子帮助理解演变碳酸盐世界由鲕状岩思考了,在学习节的三叠纪的 Daye 形成是重要的,哪个仍然是不明确的起源,并且他们给卓见进荒凉的海地板的沉积模式。 | Mingxiang Mei Jinhan Gao | 2012 | Geoscience Frontiers2012，3，6： | 3 |
| 13 | A New Progress of the Proterozoic Chronostratigraphical Division显示文摘The Precambrian, an informal chronostratigraphical unit, represents the period of Earth history from the start of the Cambrian at ca. 541 Ma back to the formation of the planet at 4567 Ma. It was originally conceptualized as a 'Cryptozoic Eon' that was contrasted with the Phanerozoic Eon from the Cambrian to the Quaternary, which is now known as the Precambrian and can be subdivided into three eons, i.e., the Hadean, the Archean and the Proterozoic. The Precambrian is currently divided chronometrically into convenient boundaries, including for the establishment of the Proterozoic periods that were chosen to reflect large-scale tectonic or sedimentary features(except for the Ediacaran Period). This chronometric arrangement might represent the second progress on the study of chronostratigraphy of the Precambrian after its separation from the Phanerozoic. Upon further study of the evolutionary history of the Precambrian Earth, applying new geodynamic and geobiological knowledge and information, a revised division of Precambrian time has led to the third conceptual progress on the study of Precambrian chronostratigraphy. In the current scheme, the Proterozoic Eon began at 2500 Ma, which is the approximate time by which most granite-greenstone crust had formed, and can be subdivided into ten periods of typically 200 Ma duration grouped into three eras(except for the Ediacaran Period). Within this current scheme, the Ediacaran Period was ratified in 2004, the first period-level addition to the geologic time scale in more than a century, an important advancement in stratigraphy. There are two main problems in the current scheme of Proterozoic chronostratigraphical division:(1) the definition of the Archean–Proterozoic boundary at 2500 Ma, which does not reflect a unique time of synchronous global change in tectonic style and does not correspond with a major change in lithology;(2) the round number subdivision of the Proterozoic into several periods based on broad orogenic characteristics, which has not met with requests on the concept of modern stratigraphy, except for the Ediacaran Period. In the revised chronostratigraphic scheme for the Proterozoic, the Archean–Proterozoic boundary is placed at the major change from a reducing early Earth to a cooler, more modern Earth characterized by the supercontinent cycle, a major change that occurred at ca. 2420 Ma. Thus, a revised Proterozoic Eon(2420–542 Ma) is envisaged to extend from the Archean–Proterozoic boundary at ca. 2420 Ma to the end of the Ediacaran Period, i.e., a period marked by the progressive rise in atmospheric oxygen, supercontinent cyclicity, and the evolution of more complex(eukaryotic) life. As with the current Proterozoic Eon, a revised Proterozoic Eon based on chronostratigraphy is envisaged to consist of three eras(Paleoproterozoic, Mesoproterozoic, and Neoproterozoic), but the boundary ages for these divisions differ from their current ages and their subdivisions into periods would also differ from current practice. A scheme is proposed for the chronostratigraphic division of the Proterozoic, based principally on geodynamic and geobiological events and their expressions in the stratigraphic record. Importantly, this revision of the Proterozoic time scale will be of significant benefit to the community as a whole and will help to drive new research that will unveil new information about the history of our planet, since the Proterozoic is a significant connecting link between the preceding Precambrian and the following Phanerozoic. | MEI Mingxiang Kyawt Kay KHAING | 2016 | Acta Geologica Sinica(English Edition)2016，90，4： | 2 |
| 14 | Study on sequence stratigraphic framework and relative sea-level changes for the Devonian of the Qian-Gui area 显示文摘 | MEI Mingxiang GAO Jinhan LI Donghai | 2003 | Acta Sedimentologica Sinica2003，21，2： | 1 |
| 15 | Sedimentary Facies Architectures of Third-Order Sequences from Early to Middle Triassic in Nanpanjiang Basin显示文摘There are complex and regular changes on sedimentary facies from the Early to the Middle Triassic in the Nanpanjiang basin. After the obvious drowned event of carbonate platforms in the transitional period between Permian and Triassic, carbonate platforms have evolved into the ramp type from the rimmed shelf type. The differentiation of sedimentary facies becomes clearer in space, which are marked by the changes from an attached platform to a turbidity basin and several isolated platforms in the basin. The striking characteristics are the development of oolitic banks on isolated platforms in Nanning and Jingxi and the reef and bank limestones in the margin of the attached platform in the Early Triassic. Despite the difference of the time span and the architecture of facies succession of third order sedimentary sequences, the process of the third order relative sea level changes reflected by the sedimentary facies succession of the third order sequences is generally synchronous. Therefore, six third order sequences could be discerned in the strata from the Early to the Middle Triassic in the Nanpanjiang basin. Using two types of facies changing surfaces and two types of diachronisms in stratigraphic records as the key elements, the sedimentary facies architectures of the third order sequences that represent sequence stratigraphic frameworks from the Early to the Middle Triassic in the Nanpanjiang basin could be constructed. | Mei Mingxiang Ma Yongsheng Deng Jun Gao Jinhan Chen Huijun Meng Qingfen Li Donghai Faculty of Earth Sciences and Resources, China University of Geosciences, Beijing 100083 | 2003 | Journal of China University of Geosciences2003，14，2： | 1 |
| 16 | Subdivision and Correlation of Middle and Upper Cambria in North China in Light of Sequence Stratigraphy显示文摘Correlation of Middle and Late Cambrian cyclic carbonates from the widely separated Zhangxia section, Qingxing section, Xishan section and Zhaogezhuang section has defined five major third-order depositional sequences. Correlation of biostratigraphy is used to establish the equivalency of stratigraphic sequences between individual sections. Even though the individ- ual sections are composed of different lithofacies and meter-scale cycles that reflect the varied environmental settings in the localities, the overall upward shallowing character of individ- ual sequences is evident. The sequences, named on their relation to the regional stages in range, are in ascending order: Zhangxia Sequence, Gushan Sequence, Guchang Sequence, Changshan Sequence and Fengshan Sequence, of which the upper four sequences were correlated with those defined by Osleger and Read in the United States, with the aid of biostratigraphic correlation. The Middle/Upper Cambrian boundary is tentatively suggested to be between the Guchang Sequence and the Changshan Sequence in North China. The optimization of the existing litho-and regional chronostratigraphic boundaries is discussed based on the sequence boundaries. | Mei Shilong Mei Mingxiang Chen Jianqing (Department of Geology and Mineral Resources, China University of Geoscienses, Beijing 100083) | 1996 | Journal of Earth Science1996，15，1： | 0 |
| 17 | Sequence-Stratigraphic Framework from the Carboniferous to the Permian Chuanshanian Epoch in Dianqiangui Basin and Its Adjacent Areas, Southwest China显示文摘The Carboniferous can be divided into four series in the Dianqiangui basin and its adjacent areas, Southwest China: the Yanguanian series, the Datangian series, the Weiningian series and the Mapingian series. The Maping Formation, traditionally used as the lithostratigraphic unit of the Upper Carboniferous, became an inter-system unit from the Carboniferous to the Permian. Thus, the top part of the Carboniferous and the bottom part of the Permian (Chuanshanian series) constitute a third-order sequence in the Dianqiangui basin and its adjacent areas. In the study area, the Carboniferous system and the Chuanshanian series of the Permian constitute a second-order sequence that can be subdivided into 6 third-order sequences. The bottom boundary of this second-order sequence is an unconformity formed in the principal episode of the Ziyun movement (the second episode), and the top boundary is also an unconformity formed in the principal episode of the Qiangui movement (the second episode). In different paleogeographical backgrounds, the strata from the Carboniferous to the Permian Chuanshanian epoch are marked by different sedimentary features. For example, coal measures and more dolomitic strata are developed in the attached platform; carbonate rocks mainly constitute the isolated platform strata; the inter-platform ditch strata are mainly composed of dark and fine sediments. Therefore, third-order sequences with different architectures of sedimentary-facies succession are formed in different paleogeographical backgrounds. Although the third-order sequences are different in the architecture of sedimentary-succession in space, the processes of their depositional environmental changes due to the third-order relative sea-level changes are simultaneous. Biostratigraphically, the surfaces of the third- ordersequences can be correlated and traced in space; the framework of sequence stratigraphy from the Carboniferous to the Chuanshanian epoch of the Permian can be established in the Dianqiangui basin and its adjacent areas in terms of two types of facies-changing surfaces as well as two kinds of diachronism in stratigraphic records. The sequence-stratigraphic subdivisions from the Carboniferous to the Permian Chuanshanian epoch in the study area show that the duration of third-order sequences, formed in the convergent period of Pangea, is more than 10 Ma. This could reflect the elementary feature that the period of sea-level change cycles formed in a relatively quiet period of tectonic action is more than 10 Ma. And this succession shows a marked cyclicity which is supposed to be the low-latitude response to the Gondwanan glaciation in the southern hemisphere. | Mei Mingxiang Ma Yongsheng Deng Jun Meng Qingfen Li Donghai | 2005 | Journal of China University of Geosciences2005，16，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员