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11篇 您的检索式:作者名="Sha Jingeng"
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1Jurassic sedimentary features and tectonic settings of southeastern China显示文摘Two types of the Jurassic basins are distinguished in SE China based on their geodynamic features: the Late Triassic-Early Jurassic post-orogenic basins and the Middle Jurassic intra-continental extensional basins. The Lower Jurassic sequence shows a change from coarseto fine-grained accumulation, suggesting a gradually deepening depositional environment from river to shore-lake and to deep-water lake. In contrast, the Middle Jurassic accumulation was changed from claystone to conglomerate along the coastal provinces in SE China, indicative of an initial crustal uplift. The Wuyi Mountains have been a paleogeograghic separating zone since the Middle Jurassic. The Late Jurassic strata are absent in most areas of SE China. A large-scale bimodal intra-continental rift-type volcanism occurred during the Middle Jurassic along a 40-60 km wide and 200 km long area in western Fujian and southern Jiangxi provinces, which is most likely the strongest volcanism in SE China since the Cambrian. The SHRIMP zircon U-Pb analyses on the rhyolite from the Dongkeng basin in the southern Jiangxi area yield a concord U-Pb age of 160±0.5 Ma, providing an upper age limit for the bimodal volcanic eruption. The analyses of the basin features indicate a change of the depositional environment during the interval from Middle Triassic to Late Triassic from a shallow-sea to an intra-continent in SE China in response to the strong collision between the Yangtze and North China Blocks. Sedimentary structures record a southward direction of Early Jurassic paleo-currents, reflecting that their source areas were to the north side. We propose that the Wuyi region was uplifted as early as Middle Jurassic, followed by a wide E-W-trending extended depression and bimodal volcanism in the western foot of the Wuyi Mountains. Presumably the uplift of the Wuyi domain changed the Middle Jurassic paleo geographic outline and formed the transformational tectonic regime from compression to extension as a tectonic response to the Pacific plate subduction.SHU LiangShu WANG Yan SHA JinGeng JIANG ShaoYong YU JinHai WANG YanBin 2009Science China Earth Sciences2009,52,12:15
2Stratigraphy of the Triassic-Jurassic Boundary Successions of the Southern Margin of the Junggar Basin,Northwestern China显示文摘The Triassic-Jurassic(Tr-J) boundary marks a major extinction event,which(~200 Ma) resulted in global extinctions of fauna and flora both in the marine and terrestrial realms.There prevail great challenges in determining the exact location of the terrestrial Tr-J boundary,because of endemism of taxa and the scarcity of fossils in terrestrial settings leading to difficulties in linking marine and terrestrial sedimentary successions.Investigation based on palynology and bivalves has been carried out over a 1113 m thick section,which is subdivided into 132 beds,along the Haojiagou valley on the southern margin of the Junggar Basin of the northern Xinjiang,northwestern China.The terrestrial Lower Jurassic is conformably resting on the Upper Triassic strata.The Upper Triassic covers the Huangshanjie Formation overlaid by the Haojiagou Formation,while the Lower Jurassic comprises the Badaowan Formation followed by the Sangonghe Formation.Fifty six pollen and spore taxa and one algal taxon were identified from the sediments.Based on the key-species and abundance of spores and pollen,three zones were erected:the Late Triassic(Rhaetian) Aratrisporites-Alisporites Assemblage,the Early Jurassic(Hettangian) Perinopollenites-Pinuspollenites Assemblage,and the Sinemurian Perinopollenites-Cycadopites Assemblage.The Tr-J boundary is placed between bed 44 and 45 coincident with the boundary between the Haojiagou and Badaowan formations.Beds with Ferganoconcha(?),Unio-Ferganoconcha and Waagenoperna-Yananoconcha bivalve assemblages are recognized.The Ferganoconcha(?) bed is limited to the upper Haojiagou Formation, Unio-Ferganoconcha and Waagenoperna-Yananoconcha assemblages are present in the middle and upper members of the Badaowan Formation.The sedimentary succession is interpreted as terrestrial with two mainly lake deposit intervals within Haojiagou and Badaowan formations,yielding fresh water algae and bivalves.However,the presence of brackish water algae Tasmanites and the marine-littoral facies bivalve Waagenoperna from the Badaowan Formation indicate that the Junggar Basin was influenced by sea water caused by transgressions from the northern Tethys,during the Sinemurian.SHA Jingeng Vivi VAJDA PAN Yanhong Linda LARSSON YAO Xiaogang ZHANG Xiaolin WANG Yaqiong CHENG Xiansheng JIANG Baoyu DENG Shenghui CHEN Siwei PENG Bo 2011Acta Geologica Sinica(English Edition)2011,85,2:7
3A Different Opinion on the Geological Age of the Longzhaogou and Jixi Groups of Eastern Heilongjiang, China显示文摘The age of the Longzhaogou and Jixi Groups of coal measures in eastern Heilongjiang were previouslyconsidered to be Jurassic or mainly Jurassic. But there occur Middle Barremian-Early Albian Aucellina(bivalvia) fossils in the Upper Yunshan Formation of the Longzhaogou Group and the Lower Chengzihe For-mation of the Jixi Group, and the Qihulin Formation of the Longzhaogou Group yields Early Cretaceousbivalve and ammonite fossils. Consequently, the geological ages of the two groups are mainly, or even all, Ear-ly Cretaceous.Sha Jingeng Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing, Jiangsu 1992Acta Geologica Sinica(English Edition)1992,66,2:7
4Late Triassic bivalves associated with a hydrothermal vent system in the Yidun Island Arc (SW China) of the eastern Tethys显示文摘The Yidun Island Arc in the Three Rivers (Jinsha River, Lancang River, Nujiang River) region of southwestern China is one of the most important Kuroko-type volcanogenic massive sulfide deposits (VMS) in China. Intra-arc rifting of Yidun Island occurred during the Late Carnian-Norian when VMS deposits such as the Gacun Pb-Zn-Cu deposit were formed. A bivalve fauna was found in fine-grained tuffaceous slate and in mineralized tuffaceous siltstone containing very high contents of Pb (45.01-103.37 ppm) and Zn (135.78-300.03 ppm) of the upper Tumugou Formation in the Changtai-Gacun volcanic-sedimentary rift basin. Stratigraphically, the bivalve-bearing beds are equivalents of the Gacun Pb-Zn-Cu deposits. The diversity of this bivalve fauna is very low. It consists mainly of the thin-shelled, epibyssate suspension-feeding bivalves Pergamidia eumenea and Parapergamidia changtaiensis, the burrowing large, elongated, suspension-feeding Trigonodus keuperinus and Unionites? sp., and occasional specimens of the endobyssate suspension-feeding Trigonodus? sp. and the deep burrowing suspension-feeding Pleuromya markiamensis. Individuals of the first four taxa are so abundant that the specimens are sometimes concentrated in shell beds, probably indicating a gregarious habit. This bivalve fauna is associated with internal moulds of cylindrical, slightly conical tubes most likely produced by a worm-shaped organism. Composition, morphology, diversity, and high abundance of this fauna, chemical features of the surrounding sediment, and the tectonic setting all suggest that this bivalve fauna lived in a deep-water environment in or around a hydrothermal vent system.LIN Li ZHU LiDong PANG YanChun SHA JinGeng Franz T. FURSICH FU XiuGen WANG XinLi 2011Science China Earth Sciences2011,54,12:2
5Studies on the Early Cretaceous Longzhaogou and Jixi Groups of eastern Heilongjiang, north east China, and their bearing on the age of supposedly Jurassic strata in easter n Asia显示文摘SHA Jingeng CAI Huawei HE Chengquan 2002Journal of Asian Earth Sciences2002,20,2:1
6Biostratigraphy of the Upper Jurassic- Lower Cretaceous bivalves Buchia and Aucellina of eastern Heilongjiang, northeast China显示文摘SHA Jingeng FRSICH F T 1993Geological Magazine1993,130,4:1
7Revised Cretaceous age for the Longzhaogou and Jixi Groups of eastern Heilongjiang, China, previous ly considered Jurassic: Palaeogeographic implications显示文摘SHA Jingeng FRSICH F T GRANT-MACKIE J A 1994Newsletters on Str atigraphy1994,31,2:1
8Studies on the Early Cretaceous Long Zhaogou and Jixi Groups of eastern Heilongjiang,northeast China,and their bearing on the age of supposedly Jurassic strata in eastern Asia显示文摘Sha Jingeng Cai Huawei He Chengquan 2002Journal of Asian Earth Sciences2002,20,2:1
9The Upper Jurassic-Lower Cretaceous of eastern Heilongjiang, NE China: stratigraphy and regional basin history 显示文摘Sha Jingeng Masaki Matsukawa Cai Huawei 2003Cretaceous Research2003,,24:1
10Preface——Jurassic of China and Environs: Stratigraphy, Basin History, and Paleoenvironment显示文摘The Jurassic is a geologically very complicated period in Earth history, spanning from 200 to 145 Ma. The Pangean supercontinent and even the Gondwana-land broke up, and the violent circum Paleo-Pacific (Yanshan) orogeny and the collisions between Paleo-Pacific margins took place, both accompanied by extensiveSHA JinGeng LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China 2009Science China Earth Sciences2009,52,12:1
11The brackish-water bivalve Waagenoperna from the Lower Jurassic Badaowan Formation of the Junggar Basin and its palaeoenvironmental and palaeogeographic significance显示文摘略有盐味水的瓣鳃类 WaagenopernaTokuyama, 1959 在四个地区从更低的侏罗记 Badaowan 形成被报导,沿着南部的边缘和 Junggar 盆的西方的边缘。在这块地里记录的 Taphonomic 特征显示它发生在本土或 parautochthonous 集合。Waagenoperna 的个体生态学因此在区域的 palaeoenvironment 上产出信息。到海洋、略有盐味水的背景的 Waagenoperna 的限制建议海水曾经在 Sinemurian 期间到达了这些区域。这份报纸讨论 palaeogeographic 含意并且从西方建议海水的 ingression 到 Junggar 盆的西方、南部的部分。另外,在 Junggar 盆从 Haojiagou 节收集的二 Waagenoperna 种分类地被记录。Yanhong Pan Jingeng Sha Yaqiong Wang Xiaolin Zhang Xiaogang Yao Bo Peng Xin Rao 2013Geoscience Frontiers2013,4,1:1
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