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| 1 | Chronology and geochemistry of the volcanic rocks in Woruo Mountain region,Northern Qiangtang depression:Implications to the Late Triassic volcanic-sedimentary events显示文摘A suite of sedimentary-volcaniclastic rocks intercalated with the volcanic rocks unconformably overlies the Triassic Xiaochaka Formation in the Woruo Mountain region, Qiangtang Basin, northern Tibet. The vitric tuff from the base of these strata gives a SHRIMP zircon U-Pb age of 216 ± 4.5 Ma, which represents the age of the Late Triassic volcanic-sedimentary events in the Woruo Mountain region, and is consistent with that of the formation of the volcanic rocks from the Nadi Kangri Formation in the Nadigangri-Shishui River zone. There is a striking similarity in geochemical signatures of the volcanic rocks from the Woruo Mountain region and its adjacent Nadigangri-Shishui River zone, indicating that all the volcanic rocks from the Qiangtang region might have the same magmatic source and similar tectonic setting during the Late Triassic. The proper recognition of the Late Triassic large-scale volcanic eruption and volcanic-sedimentary events has important implications for the interpretation of the Late Triassic biotic extinction, climatic changes and regressive events in the eastern Tethyan domain, as well as the understanding of the initiation and nature, and sedimentary features of the Qiangtang Basin during the Late Triassic-Jurassic. | WANG Jian FU XiuGen CHEN WenXi WANG ZhengJiang TAN FuWen CHEN Ming ZHUO JieWen | 2008 | Science China Earth Sciences2008，51，2： | 21 |
| 2 | New Insights into the Late Triassic Nadigangri Formation of Northern Qiangtang, Tibet, China: Constraints from U-Pb Ages and Hf Isotopes of Detrital and Magmatic Zircons显示文摘We report here U-Pb age and in situ Hf isotopic results for detrital and magmatic zircons from one conglomerate and four tuffite samples from the Late Triassic Nadigangri Formation across the North Qiangtang depression, Tibet. Coupled with previously published data in the region, this paper proposes new insights into the geochronological framework for the Nadigangri Formation. The deposition ages of tuffite from top to bottom in the Woruo Mountain, Quem Co and Dongqu River, are 203 Ma, 226 Ma, 221.5 Ma and 221.1 Ma, respectively. The detrital zircons yield a younger cluster of ages of 201.5–225 Ma from the conglomerate of the Quem Co Formation. The Late Triassic Nadigangri Formation defines a temporal range approximately between 201 and 225 Ma(Norian-Rhaetian), including three predominant groups of 220–225 Ma, 210–217 Ma and 201–205 Ma, which correspond with the three main rifting episodes of initial rifting, further rifting and final rifting. Positive εHf(t) value and low model ages in younger detrital zircons suggests a juvenile character. However, the Hf isotopes of magmatic zircons display the presence of reworked ancient crust with 1.1–1.8 Ga. These results provide strong constraints not only on the temporal range of the Late Triassic Nadigangri Formation, but also on the onset of the Qiangtang Mesozoic rift basin. | LI Xueren WANG Jian CHENG Leli FU Xiugen WANG Yuke | 2018 | Acta Geologica Sinica(English Edition)2018，92，4： | 5 |
| 3 | Late 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 | 2011 | Science China Earth Sciences2011，54，12： | 2 |
| 4 | The Late Triassic Rift-Related Volcanic Rocks from Eastern Qiangtang, Northern Tibet ( China ) : Age and Tectonic Implications 显示文摘 | Fu Xiugen Wang Jian Tan Fuwen | 2010 | Gondwana Research2010，17，： | 1 |
| 5 | Geochemical and palynological investigation of the Shengli River marine oil shale (China):Implications for paleoenvironment and paleoclimate显示文摘 | Fu Xiugen Wang Jian Zeng Yuhong | 2009 | International Journal of Coal Geology2009，78，3： | 1 |
| 6 | Concentrations and modes of occurrence of platinum group elements in the Shengli River oil shale,northern Tibet,China显示文摘 | Fu Xiugen Wang Jian Zeng Yuhong | 2010 | Fuel2010，89，12： | 1 |
| 7 | Geochemistry and origin of rare earth elements (REEs) in the Shengli River oil shale,northern Tibet,China显示文摘 | Fu Xiugen Wang Jian Zeng Yuhong | 2011 | Chemie der Erde-Geochemistry2011，71，1： | 1 |
| 8 | Sedimentological in-vestigations of the Shengli River-Changshe Mountain oil shale(China):Relationships with oil shale formation显示文摘 | Fu Xiugen Wang Jian Tan Fuwen | 2009 | Oil Shale2009，26，3： | 1 |
| 9 | Geochemical and paly-nological investigation of the Shengli River marine oil shale(Chi-na):Implications for paleoenvironment and paleoclimate显示文摘 | Fu Xiugen Wang Jian Tan Fuwen | 2009 | International Journal of Coal Geology2009，78，3： | 1 |
| 10 | Re-Os(ICP-MS)dating of marine oil shale in the Qiangtang basin,northern Tibet,China显示文摘 | Fu Xiugen Wang Jian Qu Wenjun | 2008 | Oil Shale2008，25，1： | 1 |
| 11 | Re-Os(ICP-MS) Dating of marine oil shale in the Qiang Tang Bain, Northern Tibet, China显示文摘 | Fu Xiugen Wang Jian Qu Wenjun | 2008 | Oil Shale2008，25，1： | 1 |
| 12 | Geochemical and paly- nological investigation of the Shengli River marine oil shale(China):Implications for paleoenvironment and paleoclimate 显示文摘 | Fu Xiugen Wang Jian Zeng Yuhong | 2009 | Intemational Journal of Coal Geology2009，78，： | 1 |
| 13 | Geochemistry of ter- restrial oil shale {rom the Lunpola area, northern Tibet, China 显示文摘 | Fu Xiugen Wang Jian Tan Fuwen et ai | 2012 | International Journal of Coal Geology2012，102，： | 1 |
| 14 | Geochemical and palynological investigation of the Shengli River marine oil shale (China):Implications for paleoenvironment and p aleoclimate 显示文摘 | Fu Xiugen Wang Jian Zeng Yuhong Li Zhongiong | 2009 | International Journal of Coal Geology2009，78，： | 1 |
| 15 | The Late Triassic rift-related volcanic rocks from eastern Qiangtang, north- ern Tibet (China) : Age and tectonic implications 显示文摘 | Fu Xiugen Jian Wang Fuwen Tan Ming Chen Wen-bin Chen | 2010 | Gondwana Research2010，17，： | 1 |
| 16 | Characteristics and discovery significance of the Upper Triassic–Lower Jurassic marine shale oil in Qiangtang Basin,China显示文摘Mesozoic marine shale oil was found in the Qiangtang Basin by a large number of hydrocarbon geological surveys and shallow drilling sampling.Based on systematic observation and experimental analysis of outcrop and core samples,the deposition and development conditions and characteristics of marine shale are revealed,the geochemical and reservoir characteristics of marine shale are evaluated,and the layers of marine shale oil in the Mesozoic are determined.The following geological understandings are obtained.First,there are two sets of marine organic-rich shales,the Lower Jurassic Quse Formation and the Upper Triassic Bagong Formation,in the Qiangtang Basin.They are mainly composed of laminated shale with massive mudstone.The laminated organic-rich shale of the Quse Formation is located in the lower part of the stratum,with a thickness of 50–75 m,and mainly distributed in southern Qiangtang Basin and the central-west of northern Qiangtang Basin.The laminated organic-rich shale of the Bagong Formation is located in the middle of the stratum,with a thickness of 250–350 m,and distributed in both northern and southern Qiangtang Basin.Second,the two sets of laminated organic-rich shales develop foliation,and various types of micropores and microfractures.The average content of brittle minerals is 70%,implying a high fracturability.The average porosity is 5.89%,indicating good reservoir physical properties to the level of moderate–good shale oil reservoirs.Third,the organic-rich shale of the Quse Formation contains organic matters of types II1 and II2,with the average TOC of 8.34%,the average content of chloroform bitumen'A'of 0.66%,the average residual hydrocarbon generation potential(S1+S2)of 29.93 mg/g,and the Ro value of 0.9%–1.3%,meeting the standard of high-quality source rock.The organic-rich shale of the Bagong Formation contains mixed organic matters,with the TOC of 0.65%–3.10%and the Ro value of 1.17%–1.59%,meeting the standard of moderate source rock.Fourth,four shallow wells(depth of 50–250 m)with oil shows have been found in the organic shales at 50–90 m in the lower part of the Bagong Formation and 30–75 m in the middle part of the Quse Formation.The crude oil contains a high content of saturated hydrocarbon.Analysis and testing of outcrop and shallow well samples confirm the presence of marine shale oil in the Bagong Formation and the Quse Formation.Good shale oil intervals in the Bagong Formation are observed in layers 18–20 in the lower part of the section,where the shales with(S0+S1)higher than 1 mg/g are 206.7 m thick,with the maximum and average(S0+S1)of 1.92 mg/g and 1.81 mg/g,respectively.Good shale oil intervals in the Quse Formation are found in layers 4–8 in the lower part of the section,where the shales with(S0+S1)higher than 1 mg/g are 58.8 m thick,with the maximum and average(S0+S1)of 6.46 mg/g and 2.23 mg/g,respectively. | SHEN Anjiang FU Xiaodong ZHANG Jianyong WEI Xuebin HU Anping WANG Jian XIONG Shaoyun FU Xiugen XIE Yuan LIU Siqi LI Xi WANG Xin HE Xunyun QIAO Zhanfeng ZHENG Jianfeng DUAN Junmao | 2023 | Petroleum Exploration and Development2023，50，5： | 0 |
| 17 | A Toarcian Ocean Anoxic Event record from an open-ocean setting in the eastern Tethys: Implications for global climatic change and regional environmental perturbation显示文摘The Early Toarcian“Oceanic Anoxic Event”(T-OAE)is recorded by marked disruption to both the climate system and marine ecosystems.Here,we present intergraded high-resolution carbon-isotope data(δ^(13)C),bulk geochemistry,mineral characterization from an open-ocean setting in the eastern Tethys.With these data,we(1)construct the high-resolution record of the T-OAE from an open-ocean setting in the eastern Tethys;(2)show that the T-OAE in the Sewa succession was marked by coarser-grained deposits associated with high-energy conditions within the otherwise low-energy claystone deposits that likely linked to a globally increased supply of clastic sediments into marginal and deeper marine basin;(3)propose that the low C_(org):P_(total) ratios,in combination with bioturbated structure and depletion or slight enrichment in redox-sensitive trace elements of V,Mo,and U suggest a long-term oxygenation event throughout the T-OAE interval at the Sewa succession,and hence,anoxia may not play a fundamental role during the Toarcian negative CIE in this setting;(4)exhibit that a warming and more humid climate began at the start of the T-OAE,and many episodic changes in sediment provenance throughout the T-OAE interval occurred at this location;and(5)suggest that accumulation of organic-matter sediments during the T-OAE is generally controlled by global climatic changes,but a regional environmental perturbation also might influence the preservation of organic matter. | Xiugen FU Jian WANG Huaguo WEN Chunyan SONG Zhongwei WANG Shengqiang ZENG Xinglei FENG Hengye WEI | 2021 | Science China Earth Sciences2021，64，11： | 0 |
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