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Redetermination of the Crystal Structure of Vesignieite

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Acta Geologica Sinica(English Edition) 1991年第2期65卷 145-151页

作者： Ma Zhesheng He Ruilin Zhu Xiaoling china University of Geosciences institute of geology and Mineral {3., Shaanxi institute of Mineral Depostis, Chinese Academy of geological Sciences china University of Geosciences China

Vesignieite, Cu_3.a(VO_4)_2(OH)_2, crystallizes in space group C_2 / m with a°=1.0270(2), b°=0.5911(1),c°=0.7711(2)nm and β=116.42(3.°. The intensity data were collected with the RIGAKU RASA-IISsingle-crystal four-circle diffractometer. The structure was determined by Patterson and Fourier methods andrefined by the least-square technique to a final R index of 0.051 for 614 independent diffraction points with|F? |>3.|F?|. The crystal structure analysis shows that vesignieite has a layer structure parallel to (001). The powder diffraction lines were reindexed.

关键词： Redetermination of the Crystal Structure of Vesignieite

Have a correct understanding of the attribute of geologic environmentgive full play to the role of geoscience in environmental protection

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Journal of Environmental Sciences 1995年第4期7卷 491-501页

作者： Ha Chengyou(institute of Environmental geology, Ministry of geology and Mineral {3., Beijing 100081 , china)

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关键词： geologic environment attribute geologic resources geologic capacity geologic disaster.

The Palaeomagnetic Study of the MineralizationAge of Gold Deposits in the Xiong' ershan Area,Henan Province

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Acta Geologica Sinica(English Edition) 1996年第1期70卷 74-86页

作者： Wang Guanfu, Chen Zhihong, Ding Shiying and Ren Fugentianjin institute of geology and Mineral {3., tianjin, china tianjin institute of geology and Mineral {3. Tianjin China

Based on palaeomagnetic studies of the Precambrian gold deposits in the Xiong'ershan area, Henan Province, the authors infer that the ore-forming processes of the Beiling alteration-type gold ore deposit and the Dianfang breccia-type gold ore deposit started in the Proterozoic, and was superimposed by later mineralization, whereas the mineralization age of the Jiguanshan quartz- vein type gold ore deposit is Yanshanian.

关键词： Xiong' ershan area Precambrian palaeomagmatism gold deposits mineralization age

FOSSIL HAGLIDAE(ORTHOPTERA)IN china

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Science china Chemistry 1982年第10期29卷 1118-1132页

作者：洪友崇 tianjin institute of geology and Mineral {3. Ministry of Geology

The present paper discusses Haglidae (Orthoptera) and its stratigraphic and geographicdistributions in china. Basing on our fossil specimens and the known fossil records of insectsthe author tries to discuss the taxonomy of the family Haglidae, including its subfamilies andgenera. Four new genera and seven new species are established.

关键词： Cu FOSSIL HAGLIDAE ORTHOPTERA)IN china length

Enrichment mechanisms of rare earth elements in marine hydrogenic ferromanganese crusts

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Science china Earth Sciences 2011年第2期54卷 197-203页

作者： JIANG XueJun1,2,LIN XueHui1,2,YAO De3.4 & GUO WeiDong5 1 Key Laboratory of Marine Oil and Gas resources and Marine Environment,Ministry of Land and resources,Qingdao 266071,china 2 Qingdao {3. of Marine geology,china geological survey,Qingdao 266071,china 3.{3. of resources and Environment,Shandong University of Technology,Zibo 255049,china 4 {3. of Oceanology,Chinese Academy of Sciences,Qingdao 266071,china 5 Department of Oceanography,Xiamen University,Xiamen 3.1005,china 1. Key Laboratory of Marine Oil and Gas resources and Marine Environment Ministry of Land and Resources Qingdao 266071 China2. Qingdao Institute of Marine Geology China Geological Survey Qingdao 266071 China3. Institute of Resources and Environment Shandong University of Technology Zibo 255049 China4. Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China5. Department of Oceanography Xiamen University Xiamen 361005 China

A series of selective extraction experiments were conducted on marine hydrogenic ferromanganese crusts from the seamount near the Line Island to investigate the distribution of rare earth elements （REEs） and the mechanisms of combination between REEs and the hydrogenic ferromanganese crusts. The enrichment of REEs in hydrogenic ferromanganese crusts is attributed mainly to the mineral or oxide/hydroxide of the crust rather than the growth environment. The REEs are present mainly in amorphous ferric oxide/hydroxide rather than in 6-MnO2. Amorphous ferric oxide/hydroxide preferentially combines free REE3., while 6-MnO2 combines the REE-carbonate complexes in modern seawater. The REEs in seawater are combined more strongly with amorphous ferric oxide/hydroxides than with 6-MnO2. The positive Ce anomaly in hydrogenic ferromanganese crusts results from the oxidation of soluble Ce3. to insoluble Ce4＋ by the actively soluble oxygen of the bottom current rather than by the oxidation of δ-MnO2.

关键词： rare earth elements hydrogenic ferromanganese crust selective extraction experiment geochemistry combinationmechanism

DISCOVERY OF NEW FOSSIL SPIDERS IN AMBER OF FUSHUN COALFIELD

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Science in china,Ser.B 1982年第4期25卷 431-437页

作者：洪友崇 tianjin institute of geology and Mineral {3. Ministry of geology

A new genus, Sinodictyna （Archanda）, has been obtained from amber on the main coalbeds of the Gucheggzi Formation (E2g1), Fush?n Coalfield In Liaoning Province. It suggeststhat Sinodictyna belongs to a regional form in china and that it differs from European Balticamber Eolathys in the chelate teeth, pedipal, walking legs and its appendages. New genusdiscovered first in china fills in tlie gaps in the field of paleontology of china.

关键词： length

Northernmost paleo-tethyan oceanic basin in Tibet:Geo-chronological evidence from ^(40)Ar/^(3.)Ar age dating of Dur'ngoi ophiolite

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Chinese Science Bulletin 2001年第14期46卷 1203-1205页

作者： CHEN Liang, SUN Yong, PEI Xianzhi, GAO Ming, FENG Tao, ZHANG Zhongqing & CHEN Wen1. Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, china 2. Department of geology, Northwest University, Xi’an, 710069, china 3. {3. of geology, Chinese Academy of geological Sciences, Beijing, 10003., china Laboratory of Continental Dynamics Northwest University Xi’an China Department of geology Northwest University Xi’an China institute of geology Chinese Academy of Geological Sciences Beijing China

Whole rock 40Ar/3.Ar age dating has been conducted on a basalt sample from Dur’ngoi ophiolite, Qinghai Province, which was reported to be the northernmost pa-leo-tethyan oceanic basin in Tibet. A high temperature pla-teau age (3.5.3.7.9 Ma) with an isochorn age (3.6.6±7.1 Ma) has been obtained, representing the eruption time of oceanic crust Considering related geological settings, the new age provides constraints on the northernmost pa-leo-tethyan suture zone in Tibet and the tectonic evolution of Paleo-tethys in Northeast Tibet and adjacent areas.

关键词： Dur’ngoi ophlolite 40Ar -3.Ar age Paleo-tethys.

Identification of Hercynian shoshonitic intrusive rocks in central Hainan Island and its geotectonic implications

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Science Bulletin 2006年第20期51卷 2507-2519页

作者： XIE Caifu1, 2, ZHU Jinchu1, DING Shijiang3. ZHANG Yeming2, FU Tai’an2 & LI Zhihong2 1. State Key Laboratory for Mineral Deposits Research and Department of Earth Sciences, Nanjing University, Nanjing 210093. china 2. Yichang institute of geology and Mineral {3., Yichang 443.03. china 3. Hainan Bureau of geology and Mineral {3., Haikou 570226, china Department of Otolaryngology University Hospital VU P.O. Box 7057 1007 MB Amsterdam The Netherlands State Key Laboratory for Mineral Deposits Research and Department of Earth Sciences Nanjing University Nanjing 210093 China

An identification has been made of some shoshonitic intrusive rocks in central Hainan Island recently. These rocks are K-rich (K2O=2.9%―5.1%, K2O/Na2O=0.95―2.12), distinctly enriched in LILE and LREE, strongly depleted in Nb, Ta, and moder- ately depleted in Sr and Ti, with (87Sr/86Sr)i = 0.70859―0.71425 and ε Nd(t) = (?2.77―?7.49). They were derived from an EMⅡ-type mantle source. The enrichment process is related to metasomatism of depleted mantle caused by a great amount of fluid-melt released from oceanic crust and terri- genous sediments at great depth (eclogite facies) during the subduction of the South china plate under the Indochina-South china Sea plate in the Carbon- iferous–Early Permian. A SHRIMP U-Pb zircon dating yields a crystallization age of 272±7 Ma for the sho- shonitic intrusions, which is coeval with the strongly peraluminous granites found in central Hainan Island. These two kinds of rocks generally possess syn-intrusion ductile deformation structures. Thus they are considered to have been generated during the early stage (syn-thrust phase) of a post-collisional event. The primary magma of shoshonitic rocks was produced at a depth > 80 km by decompression- dehydration melting of previously enriched litho- spheric mantle wedge, phlogopite-bearing garnet peridotite, which was in turn caused by the break-off of a descendent slab and upwelling of a hot as- thenosphere. The rising of melts was accompaniedby crustal contamination and crystallization fractiona- tion (AFC). Combining with other related data, it is proposed that the southwards subduction and amal- gamation of the South china plate with the Indo- china-South china Sea plate took place at ca. 287- 278 Ma, which was a part of the convergence proc- ess of the Pangea supercontinent. The suture zone was probably located along the line of Song Ma-Beibu Gulf-north margin of the Yunkai Moun- tains-Wuyi Mountains.

关键词： SHRIMP U-Pb dating Hercynian shoshonitic intrusive rocks post-collisional event enriched mantle Hainan Island.

SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau

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Science china Earth Sciences 2010年第5期53卷 657-664页

作者： ZHAI QingGuo1 WANG Jun1, LI Cai2 & SU Li3.1 institute of geology, Chinese Academy of geological Sciences, Beijing 10003.,{3. 2 College of Earth Sciences, Jilin University, Changchun 13.061,{3. 3.The geological Laboratory Center and State Key Laboratory of geological Processes and Mineral resources,{3. University of Geo- sciences, Beijing 100083.{3. 1. institute of geology Chinese Academy of Geological Sciences Beijing 100037 China2. College of Earth Sciences Jilin University Changchun 130061 China3. The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China

Metabasites consisting of metamorphic ultra-mafic rocks, cumulate gabbro, gabbro (diabase), basalt, and plagiogranite are exposed at the Taoxinghu area in central Qiangtang, northern Tibetan Plateau. Zircon SHRIMP U-Pb dating for the cumulate gabbro yields a weighted mean age of 467±4 Ma, which is the oldest and most reliable magmatic age in this area. Zircon 176Hf/177Hf ratios range from 0.282615 to 0.282657, with εHf(t) values of 5.02±0.28, indicating that the cumulate gabbro was mainly derived from the depleted mantle. In addition, geochemical data of metabasites suggest that they have similar characteristics to those in the mid-ocean ridge basalts (MORB). The Taoxinghu metabasites may represent the fragment of Early Paleozoic ophiolite in the "Central Uplift" of the Qiangtang, northern Tibetan Plateau.

关键词： Qiangtang cumulate gabbro SHRIMP dating Hf isotope