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Science china Earth Sciences 2005年第2期48卷 145-155页

作者： LI Renwei, WAN Yusheng, CHENG Zhenyu, ZHOU Jianxiong, XU Yunhua, LI Zhong & JIANG Maosheng Institute of Geology and Geophysics, chinese academy of Sciences, beijing 100029,{3. Institute of Geology, chinese academy of geological Sciences, beijing 100037,{3. Institute of Mineral Resources, chinese academy of geological Sciences, beijing 100037,{3. Institute of Geology and Geophysics Chinese Academy of SciencesBeijing100029China Institute of Geology Chinese Academy of Geological SciencesBeijing100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing100037China

The shrimp U-Pb ages of detrital zircon from the oldest Mesozoic strata, the Fanghushan Fomation, in the Hefei Basin range from 200 Ma to ca. 2500 Ma, which indicates that the Dabie Orogen as the early Jurassic sedimentary provenance was complex. The composition of the Dabie Orogen includes: the Triassic high pressure-ultrahigh pressure metamorphic rocks, of which the detrital zircon ages are from 23. Ma to 200 Ma; the rocks possibly related to the Qinling and Erlangping Groups representing the southern margin of the Sino-Korean craton in the Qinling and Dabie area, of which the detrital zircon has an age of 481-3.8 Ma; the Neoproterozoic rocks originated from the Yangtze croton, of which the detrital zircon ages are 799-721 Ma old; and the rocks with the detrital zircon ages of ca. 2000 Ma and ca. 2500 Ma, which could be the old basement of the Yangtze craton.

关键词： Hefei Basin, detrital zircon, shrimp U-Pb dating, Dabie Orogen.

Quartz-Ferberite Oxygen isotope Geothermometer and Its geological Applications

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Acta Geologica Sinica(English Edition) 1992年第3期66卷 271-281页

作者： Ding Tiping Liu Yushan Wan Defang Liu Zhijian Li Jincheng Zhang Guilan Institute of Mineral Deposits, chinese academy of geological Sciences, {3. Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing

Experiments for oxygen isotope exchange between ferberite and water were carried out and the followingequation on oxygen isotope fractionation between ferberite and water against temperature was obtained:Combining this equation with the equation of Clayton et al. (1972) on oxygen isotope fractionation be-tween quartz and water, an equation on oxygen isotope fractionation between quartz and ferberite was ob-tained:The Bigeleison-Mayer function method was used to calculate the oxygen isotope fractionation betweenquartz and ferberite. The theoretical curve obtained agrees with the experimental calibration results quite wellin the temperature range of *** above calibrated equation has been used in 5 world famous tungsten deposits to determine their tem-peratures of formation. The results show that the temperature range for an idividual deposit determined by thisgeothermometer agrees with those obtained from fluid inclusion determination and other isotopegeothermometers.

关键词： geothermometer oxygen isotope quartz--ferberite

shrimp dating of the Bangong Lake SSZ-type ophiolite: Constraints on the closure time of ocean in the Bangong Lake-Nujiang River,northwestern Tibet

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chinese Science Bulletin 2007年第7期52卷 936-941页

作者： SHI RenDeng1,2 1 School of Earth and Space Sciences, University of Science and Technology of china, Hefei 23.026, china 2 Institute of Geology, chinese {3. of geological Sciences, beijing 100037, china (email: shird@***) School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

The Bangong Lake ophiolite is located in the westernmost part of the Bangong Lake-Nujiang River suture zone. It is a tectonic mélange consisting of numerous individual blocks of peridotite, pillowed and massive lavas and mafic dykes with SSZ-type ophiolitic geochemical affinity formed at the end of a Wilson circle. The shrimp U-Pb ages of the co-magmatic zircon domains from one gabbroic dyke (Sample 01Y-155) range from 162.5±8.6 Ma to 177.1±1.4 Ma with an average of 167.0±1.4 Ma (n = 12. MSWD = 1.2), suggesting that the subduction of the Bangong Lake Neo-Tethyan Ocean started before the Middle Jurassic. It is inferred that the tectonic transform from spreading to subduction of the Neo-Tethyan Ocean began before the Middle Jurassic in the Bangong Lake area.

关键词：西藏班公湖怒江缝合带古海洋闭合时期 SSZ型蛇绿岩 shrimp 测年

Depth of coesite-bearing eclogite formation, Dabie UHPM zone, china, based on structure stress correction

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Depth of coesite-bearing eclogite formation, Dabie UHPM zone...

Zircon shrimp U-Pb geochronology and petrogenesis of the plagiogranites from the Lagkor Lake ophiolite,Gerze,Tibet,china

地壳深部压力状态与地质作用学术研讨会

作者： Lü Guxian, Chen Jing, Ding Tiping, Li Xiaobo, Wang Fangzheng and Liu Ruixun Institute of Geomechanics, beijing, 100081, china Electron Microscopy laboratory, Peking University, beijing, 100871, china Open Research laboratory of isotope Geology, chinese academy of geological Sciences, beijing 100037, china Institute of geological Information, beijing, 100037, china china University of Geosciences, Wuhan, Hubei, 43.074, china Department of Geology, Peking University, beijing, 100871, china

＜正＞ Plastic deformation of garnet in coesite-bearing eclogite, quartz eclogite and garnet amphibolite of the ultra-high pressure metamorphic（UHPM） complex in Yingshan County, Dabie Mountains, has been studied by transmission electron microscopy （TEM）. Garnets have undergone ductile deformation under eclogite and amphibolite facies conditions. Garnet microstructures vary greatly with the dislocation density of the garnet being lower in coesite-bearing eclogite is than that in garnel *** generated by strong tectonic movement were an important component of the total pressure causing the formation of eclogite in the Dabie UHPM zone. The three-dimensional tectonic principal stresses and additional tectonic stress-induced hydrostatic pressure [Ps=-（σ1+σ2+σ3./3. are reconstructed according to the differential stress and strain ratio （a） of garnet in minor coesite-bearing eclogite of Yingshan county. Then the gravity-induced hydrostatic pressure （PG） is calculated through P minus PS, where P is estimated to be 2.8 GPa based on the quartz-coesite geobarmeter. Therefore, the thickness of the rock column overlying the coesite-bearing eclogite in Yingshan county is determined to be ≥2.09-3..11 km. this estimation is significantly different from the previous estimation of ≥100km obtained solely by considering the weight/specific weight ratio （W/SW）.It gives also a proper explanation to the puzzle that no tracer of addition of mantle-derived material has been found in the Dabie UHPM zone during the process of UHPM, although a number of researches claim that this process was taking place at depth of the mantle （≥100 km） . It is concluded that attention should be paid to the additional tectonic stress-induced hydrostatic pressure in the study of UHPM zones.

关键词： Dabie UHPM zone formation depth additional tectonic stress-induced hydrostatic pressure coesite-bearing eclogite tectonic physicochemistry plastic deformation garnet

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chinese Science Bulletin 2007年第5期52卷 651-659页

作者： ZHANG YuXiu1,2, ZHANG KaiJun1,3. LI Bing1,2, WANG Yang1,2, WEI QingGuo1,2 & TANG XianChun1,2 1 Key laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, chinese academy of Sciences, Guangzhou 510640,{3. 2 Graduate University, chinese academy of Sciences, beijing 10003.,{3. 3.Department of Earth Sciences, Nanjing University, Nanjing 210093.{3. Key laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

地关系与 petrographical 一起， petrological ，和 geochemicalcharacteristics ，和锆石人口，显示从在 Bangong-Nujiang 缝术地区的 Lagkor Lakeophiolite 的 plagiogranites (～ Gerze 县的 20 km 南方，中央西藏，中国)，由在海洋的外壳的运输期间的可锻的砍源于含水的斑粝岩的 anatexis 。因此，这种 plagiogranite 比传播海洋的外壳晚对或很少同时代。锆石虾 166 ±使 2.5 妈变老因为 plagiogranites 显示海洋的盆在中间的侏罗记在 Bangong-Nujiang 地区的西方的部分存在。

关键词：西藏改则县拉果错湖泊蛇绿岩斜长花岗岩锆shrimp U-Pb地质年代岩石成因

LASER Ar-Ar DATING OF MULTI-STAGE MINERALS FROM A PROTEROZOIC CHARNOCKITE SAMPLE

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LASER Ar-Ar DATING OF MULTI-STAGE MINERALS FROM A PROTEROZOI...

Geochronology of middle Neoproterozoic volcanic deposits in Yangtze Craton interior of South china and its implications to tectonic settings

第六届国际地质和环境材料分析大会

作者： CHEN Wen WANG Qingli and ZHANG Yan Key laboratory of isotope Geology Institute of Geology chinese {3. of geological Science the Ministry of Land and Resources beijing 100037 china

＜正＞The charnockites outcropped in Yishui, Shandong Province, have undergone granulite and amphibolite facies metamorphism and have very complex mineralogical assemblages. Their main mineral types include hyperite, diopside, amphibole, biotite and plagioclase, and its mineral generation is characterized by the existence of multi-stage minerals for each type. For instance, the biotite is distinctly divided into two stages, one of them shows the growth around the amphibole, and the other features an irregular

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Science china Earth Sciences 2010年第9期53卷 1307-1315页

作者： WANG ZhengJiang1, WANG Jian1, DUAN TaiZhong2, XIE Yuan1, ZHUO JieWen1,3.& YANG Ping1 1 Chengdu Institute of Geology and Mineral Resources, Ministry of Land and Resources, Chengdu 610082, china 2 Marathon Oil UK Ltd., Aberdeen, Scotland, AB15 6FZ, UK 3.Graduate Department, chinese academy of {3. Sciences, beijing 100037, china Chengdu Institute of Geology and Mineral Resources Ministry of Land and Resources Chengdu China Marathon Oil UK Ltd. Aberdeen Scotland UK Graduate Department Chinese Academy of Geological Sciences Beijing China

Here we report new shrimp dating results of the crystal tuff in Ejiaao Formation of middle Banxi Group in northern Guizhou. The results indicate that the volcanic deposition occurred at ~780 Ma. We also suggests that the igneous activities across Yangtze Craton with diabase dyke swarms and basal volcanic rocks during middle Banxi time are indicative of the episodic, extensive and vigorous great bimodal igneous events during middle Neoproterozoic (825-720 Ma) in South china. The characteristics of the igneous series are contrary to the model claiming they are of island-arc origin, but suggest that they are the records of rifting process and may be related to the episodic plume activities leading to the break-up of Rodinia.

关键词： Yangtze Craton middle Neoproterozoic Ejiaao Formation of Banxi Group shrimp zircon U-Pb dating episodic and bimodal igneous series

Spatio-temporal carbon isotope variation during the Ediacaran period in South china and its impact on bio-evolution

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Science china Earth Sciences 2009年第10期52卷 1520-1528页

作者： WANG XinQiang1 & SHI XiaoYing1,2 1 School of Earth Science and Mineral Resources, china University of Geosciences, beijing 100083. china 2 State Key {3. of geological Processes and Mineral Resources, beijing 100083. china School of Earth Science and Mineral Resources China University of Geosciences Beijing China State Key laboratory of geological Processes and Mineral Resources Beijing China

The Ediacaran period is characterized by the extremely negative carbon isotope anomalies and great biotic evolution in Earth history. At least four negative carbon isotope anomalies have been reported from this interval in South china so far. It is traditionally argued that the isotope variations can be used as a useful tool for global correlation of Ediacaran succession; however, more and more researches argued against this idea. We reviewed the previously published carbon isotope data in South china, and distributed the mean values of a certain time to the paleogeographic maps. The results show that the carbon isotope values (δ13.) vary greatly in different environments, but a clear tendency of becoming lighter from shallow platform to deep basin, with a maximum variation up to 1‰ Moreover, the important changes in Ediacaran biota, marked by the introducing of new taxa or ecologic groups, seemed to always postdate the negative anomalies but coincide with the positive shift. If the negative excursions represented the oxidation of a large dissolved organic carbon (DOC) reservoir in the ocean, the diverse Ediacaran organisms and the carbon isotope anomalies may suggest totally different environments: oxic and anoxic/euxinic. We also suggest that the elimination of euxinic state through precipitation of pyrites is one of the important environment factors in prompting the Ediacaran bio-evolution.

关键词： Ediacaran South china carbon isotope spatio-temporal variations bio-evolution

Geochemistry and Chronology of the Late Paleozoic volcanicrocks in west Tianshan Mountains, Xinjiang

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Geochemistry and Chronology of the Late Paleozoic volcanicro...

Tectono-chronologic constraints on a Mesozoic slip and thrust belt in the eastern Jiaodong Peninsula

2006年全国岩石学与地球动力学研讨会

作者： Yong-feng Zhu, Xuan Guo, Lifei Zhang (School of Earth and Space Sciences, Peking University, beijing 100871, china beijing {3. Centre, chinese academy of geological Sciences, 100037, china )

＜正＞The Late Paleozoic volcanic rocks in western Tianshan Mountains （Central Asia） formed the strata up to 10000m in an area of large than 3.000km2. These volcanic rocks distribute in TAS plot continuously from basalt, basaltic trachyandesite, trachyandesite, trachyte, to rhyolite. The zircon shrimp dating shows that the zircons from basalts and trachy-andesites vary between 299

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Science china Earth Sciences 2007年第1期50卷 25-32页

作者： ZHANG HongYuan1,2, HOU QuanLin3.& CAO DaiYong 4 1 Institute of Geology, chinese academy of geological Sciences,{3., china 2 State Key laboratory of geological Processes and Mineral Resources, china University of Geosciences, beijing 100083. china 3.Graduate School of china Acacemy of Sciences, beijing 10003., china 4 Key laboratory of Coal Resources (CUMT), Ministry of Education, beijing 100083. china Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China State Key laboratory of geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Graduate School of china Acacemy of Sciences Beijing 100039 China Key laboratory of Coal Resources (CUMT) Ministry of Education Beijing 100083 China

A major slip and thrust belt within the eastern Jiaodong Peninsula is located at the eastern terminal of the Qinling-Dabie-Sulu orogenic belt between the Sino-Korea Block and Yangtze Block. Although a lot of isotope chronologic data have been obtained regionally, little structural chronological research has been conducted in this region and this paper corrects that. Syn-deformational minerals were system-atically selected from samples of the NE-ENE trending transpressional shear zones and transpres-sional nappes and carefully analysed using 40Ar/3.Ar methods. Two tectonic events were defined with the first event resulting from early movement of transpressional nappes around 190 Ma ago. This ac-cords with the period of syn-orogenic sinistral slip of the Tan-Lu faults and clockwise shear in the Eastern Qinling-Tongbaishan part of the Qinling-Dabie-Sulu orogenic belt. The second event involved strikeslip thrust movement of deep shear zones between 13.Ma and 12.Ma. This resulted from the onset of Mesozoic tectonic conversion in the eastern Jiaodong Peninsula. The sinistral strikeslip-thrusting in Jiaodong Peninsula and the extensional tectonism (toward ESE) in Liaodong Peninsula probably resulted in the clockwise rotation of Korea Peninsula in late Mesozoic.

关键词： the eastern Jiaodong Peninsula tectono-chronology 40Ar/3.Ar strikeslip and thrust belt.