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| 1 | Mesoproterozoic age for Xiamaling Formation in North China Plate indicated by zircon SHRIMP dating显示文摘Zircon grains of magmatic origin from tuffite layers in the Xiamaling Formation at Zhaojiashan Village, Xuanhua area, Hebei Province, were used for zircon dating with a Sensitive High-Resolution Ion Microprobe (SHRIMP II), which gives a weighted mean 207Pb/206Pb age of 1366±9 Ma. It shows a very similar age (1368±12 Ma) as the zircon dating from the Xiamaling Formation in Western Hill, Beijing. This age proposes that the Xiamaling Formation in the North China plate should be of Mesoproterozoic, instead of Neoproterozoic based on K-Ar, Ar-Ar dating. The new zircon age also indicates the devel- opment of macrofossils algae from the Mesoproterozoic age. | GAO LinZhi ZHANG ChuanHeng SHI XiaoYing SONG Biao WANG ZiQiang LIU YaoMing | 2008 | Chinese Science Bulletin2008，53，17： | 68 |
| 2 | SHRIMP U-Pb zircon age of tuff from the Kunyang Group in central Yunnan:Evidence for Grenvillian orogeny in South China显示文摘Whether or not Grenvillian orogeny occurred in South China still remains highly controversial because high-quality,discriminating data are lacking,and therefore,the key to resolve this matter is to find datable volcanic and/or sedimentary rocks related to Grenvillian orogeny. Such rocks are apparently present in the Fuliangpeng Member from the lower-middle part of Kunyang Group in central Yunnan; here the unit is more than 100 m thick and consists of andesitic ignimbrite,tuffite,terrigeous clastic rocks and carbonates. These volcanic rocks,developed south of the Sibao fold-thrust belts,represent the earliest calc-alkaline volcanic activity in late Precambrian time from central Yunnan and are coeval with both a change in sedimentary facies from detritus to carbonates and the beginning of seismite development elsewhere. Two samples for SHRIMP analysis were collected from this volcanic unit. Sample G3-29-2,from the bottom of Fuliangpeng Member,is an ignimbrite,and about 100 zircon crys-tals recovered from it have euhedral shapes and display relatively simple sector zonation under cathodoluminescent (CL) imaging,suggesting a magmatogenic origin. Twenty-five of the zircons were analyzed and a weighed-mean U-Pb age of 1032±9 Ma was obtained. Sample G3-29-3 from uppermost part of Fuliangpeng Member is a tuffite,and many rounded,evidently detrital zircons were recovered. Nine of these zircons were analyzed,and the oldest single-grain U-Pb zircon age is 1938±26 Ma,im-plying that Paleoproterozoic basement developed in Cathaysia. The dating result,combined with the geotectonic research on the Fuliangpeng Member,leads us to conclude that late Mesoproterozoic orogenic volcanic activity occurred in the western part of South China,and that the related collision of Yangtze and Cathaysian cratons was an integral part of the assembly of Rodinia. | ZHANG ChuanHeng GAO LinZhi WU ZhenJie SHI XiaoYing YAN QuanRen LI DaJian | 2007 | Chinese Science Bulletin2007，52，11： | 35 |
| 3 | A New SHRIMP Age of the Xiamaling Formation in the North China Plate and Its Geological Significance显示文摘建立 hypostratotype 近来前寒武纪是关于中央的研究的主要目的 -- 并且在诺思中国的 Neoproterozoic。chronostratigraphic 位置是在这研究的钥匙。然而,许多关键地平线没与高质量的同位素的年龄被校准。用有敏感高分辨率的离子 Microprobe (虾 II ) 的报导新 U-Pb 年龄,锆石 U-Pb 年龄在诺思中国板中在 Xiamaling 形成灰床被获得,产出 1368+-12 妈的加权的吝啬的 ^(206 )Pb/^(238 ) U 年龄。现在是从在北方中国板中的 Xiamaling 形成的第一虾 U-Pb 年龄,并且代表 Xiamaling 形成的中间的部分的扔的时间。锆石年龄起一个重要作用到在中央期间理解北方中国板的地质的进化 -- 并且 Neoproterozoic。 | GAO Linzhi ZHANG Chuanheng SHI Xiaoying ZHOU Hongrui WANG Ziqiang SONG-Biao | 2007 | Acta Geologica Sinica(English Edition)2007，81，6： | 35 |
| 4 | Reclassification of the Meso- and Neoproterozoic Chronostratigraphy of North China by SHRIMP Zircon Ages显示文摘High-quality zircon U-Pb ages acquired from Meso- and Neoproterozoic strata in North China in recent years has provided a high-resolution chronostratigraphic framework for dating. A basis of this high-level chronostratigraphic system provides the foundation for a global Precambrian study and stratigraphic correlation and so recent geological studies have focused attention on systemic SHRIMP zircon dating. A chronology of Meso- and Neoproterozoic strata and the time of origin of the overlying Changcheng System is given on the basis of new SHRIMP zircon dating from the Qianxi Complex and diabase of the Chuanlinggou Formation. A new tectonostratigraphy for a Neoproterozoic chronostratigraphic framework in the southeastern margin of the North China continent is underpinned by the new SHRIMP zircon dating of a Neoproterozoic mafic magma diabase in the Jiao-Liao-Xu-Huai Sub-Province. | GAO Linzhi ZHANG Chuanheng LIU Pengju TANG Feng SONG Biao DING Xiaozhong | 2009 | Acta Geologica Sinica(English Edition)2009，83，6： | 36 |
| 5 | Earthquake-induced soft-sediment deformation structures in the Mesoproterozoic Wumishan Formation,North China,and their geologic implications显示文摘Soft-sediment structures are key to defining seismites. Two soft-sediment deformation horizons, bounded by undeformed carbonate strata, have been found in the Wumishan Formation in the Jumahe region, 175 km southwest of Beijing. One is in the lowest part of Wumishan Formation; and the other is in the uppermost part of Litho-member I. The soft-sediment structures in these two horizons fall into three categories: mould-and-sag structures, hydraulic shatterings and liquefaction dikes. The mould-and-sag structures are divided into two types: one developed in tidal-flat sediments, accompa-nied by many liquefaction-related structures and characterized by autochthonous post-earthquake sediments in sags, and the other type developed in deep-water environments, is not associated with liquefaction structures, and is overlain immediately by seismogenic tsunamites. The hydraulic shat-terings are composed of pockets of fluidization conglomerate, sand intrusions, and syndepositional faults. The liquefaction dikes fall into two categories: hydraulic-fracturing dikes and lateral-spreading dikes. The former are steep, planar, and pinch out upwards. The latter are snake-like and characterized by no diapir-related drag structures in surrounding rocks. Examination of the attitudes and strati-graphic positions of these structures suggests that these soft-sediment structures are seismogenic, and consequently, are seismites. Most seismites in the Wumishan Formation are developed near the former western, margin fault of Yanliao rift. This occurrence suggests that they could be related to movements on this fault. Other geological implications are discussed. | ZHANG ChuanHeng WU ZhengJie GAO LinZhi WANG Wei TIAN YanLin MA Chao | 2007 | Science China Earth Sciences2007，50，3： | 15 |
| 6 | Revised Chronostratigraphic Framework of the Metamorphic Strata in the Jiangnan Orogenic Belt,South China and its Tectonic Implications显示文摘In a re-study of regional geology by the China Geological Survey(CGS),the key problem is in the stratigraphical division and correlation.According to the new isotopic dating of the Meso-and Neoproterozoic in China,there have been great changes in the strata correlation and tectonic explanation.The authors obtained four zircon sensitive high resolution ion micro-probe(SHRIMP) U-Pb datings from the bentonite of the Lengjiaxi Group(822±10 Ma,823±12 Ma and 834±11 Ma) and Banxi Group(802.6±7.6 Ma) in north Hunan Province,which is considered to be the middle part of the Jiangnan Orogenic Belt.On the basis of the zircon dating mentioned above,the end of the Wuling orogen is first limited in the period from 822 Ma to 802 Ma in one continued outcrop(Lucheng section) in Linxiang city,Hunan Province.Combining a series of new zircon U-Pb datings in the Yangtze and Cathaysia blocks,several Neoproterozoic volcanic events and distribution of the metamorphic rocks in the Jiangnan Orogenic Belt have been distinguished.In the context of the global geodynamics,it is useful to set up a practical and high precision chronological framework and basic and unified late Precambrian section in South China. | GAO Linzhi DING Xiaozhong ZHANG Chuanheng CHENJun LIU Yaorong ZHANG Hang LIU Xanxue PANG Weihua | 2012 | Acta Geologica Sinica(English Edition)2012，86，2： | 14 |
| 7 | Detrital Zircon Dating of Meso-and Neoproterozoic Rocks in North China and Its Implications显示文摘从中央的新日期 -- 并且 Neoproterozoic 阶层贡献分会在 2009 年 11 月 24 日在中国的地层学上在前寒武纪的系统,和国家委员会上同意的中国的最近定义的前寒武纪的地层学的 timescale。首先, Changcheng 系统的年龄范围包括 Changzhougou, Chuanlinggou, Tuanshanzi 和 Dahongyu 形成被抑制了到 1.81.6 Ga。第二,包括 Gaoyuzhuang, Yangzhuang, Wumishan, Hongshuizhuang 和 Tieling 形成的 Jixian 系统被抑制了到 1.61.4 Ga。第三,一当还未命名(未定义) 系统(1.41.0 Ga ) 仅仅在 Jixian 节在 Xiamaling 形成被开发, Tianjing。第四, Qingbaikou 系统,包括 Luotuoling 和 Jing'eryu 形成被抑制了到 1.00.78 Ga。第五,在 780635 妈之间的 Nanhuan 系统范围,和 Sinian 系统在 635542 妈以内。然而,根据一系列虾, U-Pb 标明日期从在在华南站台的 Jiangnan Orogen 带晚前寒武纪,抑制阶层将作为在 Qingbaikou 系统的上面的部分被重新定义。帮助全球地球动力学,表示晚前寒武纪的节与是有用的统一,精确、高精确按年代先后的标明日期;这这里在诺思中国块和 Jiaoliao 朝鲜语块被定义。然而,在诺思中国的 Neoproterozoic Qingbaikou 学习将是在整个中央的影响 -- 并且在在在华南的扬采·布洛克和卡赛西亚·布洛克之间的 Jiangnan Orogenic 带的 Neoproterozoic。 | GAO Linzhi LIU Pengju YIN Chongyu ZHANG Chuanheng DING Xiaozhong LIU Yanxue SONG Biao | 2011 | Acta Geologica Sinica(English Edition)2011，85，2： | 9 |
| 8 | Qingbaikouan and Crygenian in South China:Constraints by SHRIMP Zircon U-Pb dating显示文摘The Qingbaikouan System is the lowest unit of the Neoproterozoic Erathem in Chinese stratigraphic succession,and it now provides a precise geochronological framework and geological time scale for mapping and stratal correlation in China.However,a sensitive high-resolution ion microprobe(SHRIMP)U-Pb zircon age date(1368±12 Ma)obtained from a bentonite in the Qingbaikouan Xiamaling Formation indicates that it belongs to the Mesoproterozoic Erathem instead.This change is a milestone in understanding the Precambrian Stratigraphic Time Scale in China,and it has had great influence on Precambrian correlations in Asia.Otherwise,a large amount of geochronological work has been done in the'Jiangnan Orogen Belt'of South China,and new isotopic data have redefined the traditional recognition of metamorphosed Mesoproterozoic strata from the Sibao orogeny to the Neoproterozoic Erathem.Based on SHRIMP zircon U-Pb age data,the authors regard the Sibao orogeny(equal to the Wuling orogeny)as a movement at ca 820 Ma,meaning that the Sibao orogeny was not equivalent to the Grenvillian orogeny.Finally,we report here the first SHRIMP U-Pb age of the boundary between the top of the Qingbaikouan Gongdong Formation(786.8±5.6 Ma)and the bottom of the Chang’an(diamictite)Formation(778.4±5.2 Ma),which is the age of the lowest diamictite of the Nanhuan System in China. | GAO Linzhi DING Xiaozhong YIN Chongyu ZHANG Chuanheng Frank R. ETTENSOHN | 2013 | Acta Geologica Sinica(English Edition)2013，87，6： | 8 |
| 9 | The Discovery of the 2.35Ga Crystalline Basement in the Southwest of the Yangtze Block and its Geological Significance显示文摘Objective Archean and Paleoproterozoic rock units crop out in the northern and southwestern portions of the Yangtze Block in the South China Craton.Archean crystalline basement outcrops are restricted to the northern part of the Yangtze Block and are represented by the Kongling Complex.The protoliths of the TTG gneisses at Kongling were emplaced at 3.3-2.7Ga (Gao et al.,2011). | ZHANG Heng GAO Linzhi ZHANG Chuanheng DING Xiaozhong LI Tingdong LIU Yanxue | 2018 | Acta Geologica Sinica(English Edition)2018，92，6： | 4 |
| 10 | Geochronology and Tectonic Evolution of the West Section of the Jiangnan Orogenic Belt显示文摘As an important part of South China Old Land, the Jiangnan Orogenic Belt plays a significant role in explaining the assembly and the evolution of the Upper Yangtze Block and Cathaysia, as well as the structure and growth mechanism of continental lithosphere in South China.The Lengjiaxi and the Banxi groups are the base strata of the west section of the Jiangnan Orogenic Belt.Thus, the research of geochronology and tectonic evolution of the Lengjiaxi and the Banxi groups is significant.The maximum sedimentary age of the Lengjiaxi Group is ca.862 Ma, and the minimum is ca.822 Ma.The Zhangjiawan Formation, which is situated in the upper part of the Banxi Group is ca.802 Ma.The Lengjiaxi Group and equivalent strata should thus belong to the Neoproterozoic in age.The Jiangnan Orogenic Belt consisting of the Lengjiaxi and the Banxi groups as important constituents is not a Greenville Orogen Belt(1.3 Ga–1.0 Ga).The Jiangnan Orogenic Belt is a recyclic orogenic belt, and the prototype basin is a foreland basin with materials derived from the southwest and the sediments belong to the active continental sedimentation.By combining large amounts of dating data of the Lengjiaxi and the Banxi groups as well as equivalent strata, the evolutionary model of the western section of the Jiangnan Orogenic Belt is established as follows: Before 862 Ma, the South China Ocean was subducted beneath the Upper Yangtze Block, while a continental island arc was formed on the side near the Upper Yangtze Block.The South China Ocean was not closed in this period.From 862 Ma to 822 Ma, the Upper Yangtze Block was collided with Cathaysia; and sediments began to be deposited in the foreland basin between the two blocks.The Lengjiaxi Group and equivalent strata were thus formed and the materials might be derived from the recyclic orogenic belt.From 822 Ma to 802 Ma, Cathaysia continued pushing to the Upper Yangtze Block, experienced the Jinning-Sibao Movement(Wuling Movement); as result, the folded basement of the Jiangnan Orogenic Belt was formed.After 802 Ma, Cathaysia and the Upper Yangtze Block were separated from each other, the Nanhua rift basin was formed and began to receive the sediments of the Banxi Group and equivalent strata.These large amounts of dating data and research results also indicate that before the collision of the Upper Yangtze Block with Cathaysia, materials of the continental crust became less and less from the southwest to the east in the Jiangnan Orogeneic Belt; only island arc and neomagmatic arc were developed in the eastern section.Ocean-continent subduction or continent-continent subduction took place in the western and southern sections, while intra-oceanic subduction occurred in the eastern section.Comprehensive analyses on U-Pb ages and Hf model ages of zircons, the main provenance of the Lengjiaxi Group is Cathaysia. | ZHANG Heng LI Tingdong XIE Ying ZHANG Chuanheng GAO Linzhi GENG Shufang CHEN Tingyu YOU Guoqing | 2015 | Acta Geologica Sinica(English Edition)2015，89，5： | 4 |
| 11 | Sand veins and MISS from the Mesoproterozoic black shale (ca. 1.7 Ga) in North China:Implication for methane degassing from microbial mats显示文摘The Mesoproterozoic Chuanlinggou Formation (ca. 1.7 Ga) consists mainly of dark-gray to black shales that are widespread in the North China Platform. Abundant centimeter-scale sand veins are present within the shale layers of this unit, particularly in the middle part. Sand veins display ptygmatic shapes, perpendicular or with a high angle to bedding planes. They penetrate the black shale layers but are often terminated by thin, lenticular sandstone beds, forming small-scale ‘tepee-like’ structures. On bedding planes, sand veins are expressed as small ridges with 1–3 mm positive relief. Lack of polygonal shapes and their occurrence in thinly laminated, relatively deep-water shales preclude an origin from sand-filled desiccation cracks. Instead, their close association with microbially induced sedimentary structures (MISS) such as micro-wrinkles and gas blisters, putative bacterial fossils (possibly coccoidal cyanobacteria) and framboidal pyrites, suggests that they were formed by degassing of methane from microbial mat decay. Methane gas disrupted overlying sedimentary layers, creating fractures open to seawater. Fine-grained quartz sands, which were transported into the depositional environment by strong winds, filled the fractures. Sand-filled fractures were shortened and folded during burial compaction, forming ptygmatic shapes. The presence of dispersed dolomite and siderite in these sand veins suggests authigenic carbonate precipitation from anaerobic oxidation of methane (AOM). Sand veins are intensely distributed within the Chuanlinggou Formation and are spatially widespread in the North China Platform. If their methane origin is confirmed, they may have important implications for the Mesoproterozoic paleoclimate. With anoxic oceans and low seawater sulfate concentration during the Mesoproterozoic, methane release from microbial mat decay and/or microbial methanogenesis during shallow burial may have been proportionally higher than that of the modern marine environments, with resultant increase in the relative importance of methane in maintaining the Mesoproterozoic greenhouse climate. | SHI XiaoYing JIANG GanQing ZHANG ChuanHeng GAO LinZhi LIU Juan | 2008 | Science China Earth Sciences2008，51，11： | 3 |
| 12 | Sequence Stratigraphy and Relative Sea Level Changes in Sinian System of Yichang, Hubei Province显示文摘The study on outcrop sequence stratigraphy of the Sinian section in the Yangtze Gorges an important step in the comprehensive stratigraphy for the Sinian stratotype. In this paper, the base of the Nantuo tillite is selected as the bottom boundary of the Sinian, and the top of the Baimatuo Member of the Dengying Formation is taken as the top boundary. The Sinian lasted from 740 the to 570 Ma. According to the features of sequence boundary facies and the parasequence sets, two supersequences are recognized in the Sinian with six sequences. In this paper, the authors discuss the correlation of those sequences. On the basis of the subsidence rate and the thickness of decompressed deposits, the authors discuss the mechanism of tectonic and sedimentation of the Dengying Formation and the features of high-frequency rhythms as well as the 3rd-order sequences in the Yangtze Gorges. | Wang Ziqiang (Department of Geology and Mineral Resources, China University of Geosciences, Beijing 100083) Gao Linzhi (Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037) Zhang Linghua Jiang Ganqing Zhang Chuanheng Yin Yong (Dep | 1996 | Journal of Earth Science1996，15，1： | 2 |
| 13 | Microbial nu-cleation of Mg-rich dolomite in exopoIymeric substancesunder anoxic modern seawater salinity:New insight into an old enigma显示文摘 | Shi Xiaoying Zhang Chuanheng Jiang Ganqing | | Journal of China University of Geosciences0，19，5： | 1 |
| 14 | Method for segmentation of overlapping fish images in aquaculture显示文摘Individual fish segmentation is a prerequisite for feature extraction and object identification in any machine vision system.In this paper,a method for segmentation of overlapping fish images in aquaculture was proposed.First,the shape factor was used to determine whether an overlap exists in the picture.Then,the corner points were extracted using the curvature scale space algorithm,and the skeleton obtained by the improved Zhang-Suen thinning algorithm.Finally,intersecting points were obtained,and the overlapped region was segmented.The results show that the average error rate and average segmentation efficiency of this method was 10%and 90%,respectively.Compared with the traditional watershed method,the separation point is accurate,and the segmentation accuracy is high.Thus,the proposed method achieves better performance in segmentation accuracy and effectiveness.This method can be applied to multi-target segmentation and fish behavior analysis systems,and it can effectively improve recognition precision. | Chao Zhou Kai Lin Daming Xu Jintao Liu Song Zhang Chuanheng Sun Xinting Yang | 2019 | International Journal of Agricultural and Biological Engineering2019，12，6： | 1 |
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