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Geochemical characteristics and contemporary metallogenetic process of hot springs in Tengchong

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chinese Science Bulletin 1999年第S2期44卷 29-30页

作者： HU Yunzhong, WANG Haiping and ZHANG Tianle institute of Mineral Deposits, chinese Academy of {2. sciences, beijing 100037, china institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing 100037 China

1 The Geochemical characteristics of hot spring systems THE characteristic element abundance value/concentration coefficients of the geochemical characteristics ofTengchong are: Au-6.10/4.07, As-7.13/3.96, Sb-1.2./6.2., Pb-30.87/2.47, Th-2..2./2.11, Cd-0.57/2.83; Li-40/2. Ti-1.30/2.89 (abundance unit: Au-1 × 10-9, the others-1 ×10-6 ). Generally, these 8 elements can reflect the characteristics of the metallogenetic process with magmatic hydrothermal activities in the area. The abundances of other 32.elements measured are similar tothose of the crust. Granite in the area belongs to the calc-poor granite. Compared with the granite abundance in theworld, Cr, Co, Th, Pb and Cd are the concentrated elements. Their change in the regional distributionshows that Ca, Na, Th, Zn and REE increase from north to south, but Mg, Ti, Ba, Cu, Li, V, Zr,

关键词： hot spring system hydrothermal activity contemporary metallogenetic process.

Tectono－Stratigraphic　Units　of　Western　Yunnan，　china　and　Their　Counterparts　in　Southeast　Asia

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Continental Dynamics 1996年第2期 123-133页

作者： Jin Xiaochi(institute of geology ,{2. Academy of geological sciences, beijing 100037, china)

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Ｔｅｃｔｏｎｏ－ＳｔｒａｔｉｇｒａｐｈｉｃＵｎｉｔｓｏｆＷｅｓｔｅｒｎＹｕｎｎａｎ，ＣｈｉｎａａｎｄＴｈｅｉｒＣｏｕｎｔｅｒｐａｒｔｓｉｎＳｏｕｔｈｅａｓｔＡｓｉａ￥ＪｉｎＸｉａｏｃｈｉ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｌｏｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅ...

关键词： tectono-stratigraphic unit western Yunnan Southeast Asia

MELT AND FLUID INCLUSIONS IN IGNEOUS ROCKS IN CENTRAL XIZANG (TIBET)

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Science in china,Ser.B 1986年第7期29卷 771-784页

作者：王碧香 institute of geology chinese Academy of geological {2. beijing

Through a study of the characteristics and composition of melt and fluid inclusions in volcanic rocks and their associated granites in the subduction zone of the Tibetan plate, it has been found that the characteristics of the inclusions in quite a few minerals of various rock types are closely related to the nature of molten magmas, thickness of strata and cooling speed. Therefore, their characteristics may be used to discriminate different lithofacies types. In this paper the evolution and crystallization of magmas are discussed on the basis of the glass composition of the inclusions measured using the electron probe, and the gas composition and its parameters are used in elucidating the physico-chemical conditions of rock and ore formation.

关键词： TIBET MELT AND FLUID INCLUSIONS IN IGNEOUS ROCKS IN CENTRAL XIZANG

Late Eocene Sporopollen and Paleoclimate, Paleoenvironment of the Yuanqu Basin, Shanxi

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Continental Dynamics 1999年第2期 29-38页

作者： WANG Daning (institute Of geology,{2. Academy of geological sciences, beijing 100037,china)

The Late Eocene sporopollen of the Yuanqu Basin in Shanxi Province has been studied, and four sporopollen assemblages are established, in which two of them are mainly composed of pollen of angiosperm and gymnosperm, the third is mainly composed of spores of pteridophyte, and the last is of fresh water algae *** on the character of the palynoflora, the Late Eocene flora, paleoclimate and paleoenviroment of the Yuanqu Basin are discussed. This Late Eocene flora belongs to the transitional flora from temperate zone to tropical zone (transitional floral region from Portawa Floral Realm and Durgai Floral Realm). The character of paleoclimate in Late Eocene of this region is from a teinperate and humid subtropical to mild temperate zone climate. The global temperature declining event has a certain reflection in this region. The oscillation of arid climate occurs as well. During Late Eocene, lakes and marshes widely distributed in this region, and further more, the lakes and marshes frequently alternated with dry lands, appearing 3 or more times.

关键词： Late Eocene paleoclimate paleoenvironment paleoflora

geological Setting of the Porphyry Copper Deposit Series of china

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Acta Geologica Sinica(English Edition) 1992年第1期66卷 59-73页

作者： Zhang Hongtao Rui Zongyao institute of Mineral Deposits, chinese Academy of {2. sciences, beijing Liu Linqun institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing

In accordance with the terms global minerogenic series, regional metallogenic series and ore depositsystem which are put forward here, metallogenic environments at different levels are discussed for theporphyry copper deposit series in china. It is considered that the porphyry copper deposits in china arecontrolled not only by the boundaries of convergent plates but, more importantly, by the boundaries ofintraplate divergent mobile belts and those between continental blocks. Besides, the emplacement ofhypabyssal and supper-hypabyssal calc-alkaline magmas and the temporal-spatial distribution of china'sporphyry copper deposits are governed by the superimposition of fracture systems of the pre-Alpine base-ments. Meso-Cenozoic cover and continental-margin new-born crust. Such a superimposition has also re-sulted in the polycyclicity of the mineralization.

关键词： Zhang geological Setting of the Porphyry Copper Deposit Series of china

Features of inclusions in the Funiushan gold deposits of Central china and its implications for prospecting

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chinese Science Bulletin 1999年第S2期44卷 15-16页

作者： ZHANG Zhengwei~1, ZHU Bingquan~1 and DENG Jun~2.1. Guangzhou institute of Geochemistry, chinese Academy of {2., Guangzhou 510640, china 2. china University of Geoscience, beijing 100083, china Guangzhou institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China china University of Geoscience Beijing 100083 China

GOLD mineralization popularly occurs in Funiushan area. Based on the studies on more than 40 gold deposits or ore spots, it is shown that most of them are small in scale except the Pengou gold deposit, whichcan be developed into a medium one. The Pengou is a gold deposit of medium-low temperature hydrothermal type. 1 geological setting The Funiushan gold mineralization zone lying in the contiguous region of Nanzhao, Fangcheng andLushan Counties, Henan Province, is stituated on the tectonic and geochemical boundary between theNorth china block and Qinling Orogenic belt, and transverses the two first-grade tectonic units. Thehost rocks are mainly the strata of Xionger group （Pt2./sub> ） and the Funiushan granitic batholith. The Penggougold deposit is just located on the large-scale fault of Xiatang-Guihe. A series of metamorphic rocks ofXionger Group outcroped in the north of the deposit. 2.The features of deposit The ore bodies mostly appear in thick plate with sag-and-swell variation. The gold-bearing alterationzone from upper to lower layers can be divided as granite→ pyritization and phyllic alteration→ alteredgranitic porphyry→quartz vein→pyritization and phyllic alteration→cataclastic granite with phyllic alteration, i. e. the upper and lower gold-bearing layers can be separated by the altered granite. The ore

关键词： gold deposit inclusion geochemistry Funiushan.

Mineral Phase Transformation and Water Fluid Evolution of Khondalite Series in the Border Area of Shanxi and Inner Mongolia,china

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Continental Dynamics 1999年第1期 62-69页

作者： LIU Fulai institute of geology, {2. Academy of geological sciences, beijing 100037, china

Typical Precambrian khondalite series is widely exposed in the border area of Shanxi and Inner Mongolia, and is composed primarily of sillimanite garnet biotite gneiss (SS), garnet pyroxene biotite gneiss (GS) and attendant migmatitic gneiss. According to the characteristics of multistage reaction texture and mineral phase transformation, the mineral assemblage of the khondalite series can be divided into three generations: ① peak stage (M 1) mineral assemblage, involving hydrous biotite, is composed of Sil+Gt+Bi+Kf±Pl+Qz in the SS and Gt+Opx+Bi+Kf+Pl+Qz in the GS, formed at T=750℃-850 ℃ and P=0.80-0.95 GPa. Water activity (a H 2. ) of this stage was about 0.2.-0.37 (0.2.±) in the SS and 0.38-0.53 (0.45±) in the GS; ② in the post peak retrograde near isothermal decompression stage (M 2., the khondalite series of the study region is characterized by dehydration reaction of biotite, partial melting of felsic minerals and decompression texture of garnet. Sillimanite garnet migmatitic gneiss (SMS) and garnet pyroxene migmatitic gneiss (GMS) were formed at this stage. The attendant anhydrous mineral assemblages are Sil+Gt+Crd+Kf±Pl+Qz in the SMS and Gt+Opx+Crd+Kf+Pl+Qz in the GMS, formed at T= 730 ℃ - 82. ℃ and P=0.50-0.65 GPa. However, the water activity (a H 2. ) of this stage was reduced to 0.08-0.12.( 0.09± ) in the SMS and 0.13 -0.18 (0.15±) in the GMS, and ③ in the later cooling stage (M 3) of metamorphism, fine grained hydrous vermicular symplectite Bi+Kf replaced anhydrous garnet at T=500 ℃-560 ℃and P=0.32.0.44 GPa, indicating that the water activity (a H 2. ) of M 3 increased again. Research results suggest that the border conditions of mineral evolution and (dehydration) metamorphic reactions are not only controlled by PT conditions, but also genetically related to water activity evolution in the khondalite series of the study region.

关键词： Metamorphic reaction water activity khondalite series Shanxi and Inner Mongolia

Barium Anomaly and Its Geochemical Significance

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Continental Dynamics 1999年第1期 84-87页

作者： WANYusheng institute of geology, {2. Academy of geological sciences, beijing 100037 , china

In the MORBnormalized multi element variation diagram given by Pearce(1983) ,the depletions of Ba relativeto Rb and Th are differentfor *** the case ofthe Eu anomaly ,the Ba anomaly can be defined and calculated . The Ba and Eu anomalies show close positive relationships with each other. The geochemicalsignificance ofthe Ba anomaly is discussed in this paper. Key words: Ba anomaly ; Eu anomaly; GeochemistryBarium Anomaly and Its GeochemicalSignificance WANYusheng institute of geology, {2. Academy of geological sciences, beijing 100037 , china Abstract In the MORBnormalized multi element variation diagram given by Pearce(1983) ,the depletions of Ba relativeto Rb and Th are differentfor *** the case ofthe Eu anomaly ,the Ba anomaly can be defined and calculated . The Ba and Eu anomalies show close positive relationships with each other. The geochemicalsignificance ofthe Ba anomaly is discussed in this paper.

关键词： Ba anomaly Eu anomaly Geochemistry

Wave tectono-sedimentary processes in Tarim basin

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Science china Earth sciences 2005年第11期48卷 1949-1959页

作者： JIN Zhijun1,2. ZHANG Yiwei1 & CHEN Shuping1 1. Key Laboratory for Hydrocarbon Accumulation, Ministry of Education, china University of Petroleum, beijing 102.49, china 2. Exploration and Production Research institute, china Petroleum & Chemical Corporation, beijing 100083, china 1. Key Laboratory for Hydrocarbon Accumulation Ministry of Education China University of Petroleum 102249 Beijing China 2. Exploration and Production Research institute China Petroleum & Chemical Corporation 100083 Beijing China

Based on the unconformities, the formation times of structures, and geological wave filtering applied to basin fills of typical wells around the Manjiaer area in the Tarim basin, the wave tectono-sedimentary processes in the Tarim Basin are discussed. The results of geological wave filtering of basin fills of typical wells show that, in time domain, the evolution of the Tarim basin was controlled by various wave processes with the periods of 740±Ma, 2.0±Ma, 100±Ma and 30±Ma. The analyses of basin fills, basin subsidence and unconformities show that the trends of the sedimentary facies belts, depocenters, and centers of subsidence migrated and interchanged periodically with periods of 2.0±Ma. These show the propagation of wave movements in space domain. The wave evolution of the Tarim basin is of significance to understanding the formation of the oil and gas reservoirs in the basin.

关键词： Tarim basin, tectonics, sedimentation, crustal undation, wave evolution