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Ge-rich hydrothermal solutions and abnormal enrichment of Ge in coal

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chinese Science Bulletin 1999年第S2期44卷 257-258页

作者： HU Ruizhong, bi xianwu, SU Wenchao, QI Huawen and YE Zaojun Intitue of geochemistry,{3.,{3., China institute of geochemistry Chinese Academy of Sciences Guiyang 550002 China

AT present, the main source of germanium includes two types of ore deposits: some sulfide-rich Pb, Zn,Cu, Ag and An deposits and some coal deposits. Germanium occurs as an associated element in these oredeposits. The Lincang germanium deposit discovered recently in China occurs in a basin where there areexposed the Neogene coal-bearing clastic rocks with Indosinian Ge-rich (（1.9-5.0）×10-6) granitesas the basement in Lincang County, Yunnan Province. Germanium is mainly concentrated in the coalseams of the first coal-bearing horizon (Nth2) and in regard to its grade (normally n×100×10-6 with themaximum over 1000×10-6) and scale （the proven reserve about 800 t）, no such germanium mineralization has been reported so far in other parts of the world. What is the reason? The available studies have indicated that this germanium deposit is of epigenetic origin, whichdetermines that germanium must have been transferred into coal with the help of a kind of medium. It isnoticed that （i） organic germanium in natural waters is stable and it is never involved in its

关键词： coal. abnormal enrichment of germanium Ge-rich hydrothermal solution.

CHARACTERISTICS AND METALLOGENIC EVOLUTION OF AILAOSHAN GOLD METALLOGENIC BELTS IN YUNNAN, CHINA

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地学前缘 2000年第S1期7卷 404-405页

作者： Fang Weixuan, Hu Ruizhong, bi xianwu, Su Wenchao[WT5,5”BX](institute of {3.,{3., guiyang 550002,China)

Observations made in different superlarge\|large gold deposits in Ailaoshan gold metallogenic belts, Yunnan Province, China, on the eastern margin of the Qingzang (Himalayas—Karakoram—Tibet) were investigated. Geotectonically, the study area is situated in the conjoint between the Tethys and Himalayas tectonic domain, characterized by very complex geological structure, with strongly influenced by the Himalayas in late development.1\ Regional geology and gold deposits\;Ailaoshan gold metallogenic belts is localized between Ailaoshan super lithospheric faults and Jiujia—Anding brittle\|ductile shear zone, with NNW\|trending about 250km long. To southward, Zhenyuan supergiant gold deposits, Mojiang large gold deposits, and Daping giant gold deposits hosted in low metamorphic volcanic\|sedimentary rocks (D—C). Ore types include gold\|bearing quartz veins, gold\|bearing altered rocks, and the mixing of the two types. Most of gold orebodies took their positions in the substructures of the brittle\|ductile shear zone.

关键词： gold deposits Ailaoshan gold metallogenic belts Yunnan geoc hemical anomaly mineral assemblages geochemical characteristics evolutions of gold mineralization

Atmospheric Deposition-Carried Pb, Zn, and Cd from a Zinc Smelter and Their Effect on Soil Microorganisms

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Pedosphere 2009年第4期19卷 422-433页

作者： YANG Yuan-Gen2, JIN Zhi-Sheng, bi Xiang-Yang, LI Fei-Li, SUN Li, LIU Jie and FU Zhi-You institute of geochemistry,{3.,{3. (China) [a]institute of geochemistry Chinese Academy of Sciences Guiyang 550002 (China)

Dust emissions from smelters, as a major contributor to heavy metal contamination in soils, could severely influence soil quality. Downwind surface soils within 1.5 km of a zinc smelter, which was active for 10 years but ceased in 2000, in Magu Town, Cuizhou Province, China were selected to examine Pb, Zn, and Cd concentrations and their fractionation along a distance gradient from a zinc smelter, and to study the possible effects of Pb, Zn, and Cd accumulation on soil microorganisms by comparing with a reference soil located at a downwind distance of 10 km from the zinc smelter. Soils within 1.5 km of the zinc smelter accumulated high levels of heavy metals Zn （508 mg kg^-1）, Pb （95.6 mg kg^-1）, and Cd （5.98 mg kg^-1） with low ratios of Zn/Cd （59.1-115） and Pb/Cd （12.4-23.4）. Composite pollution indices （CPIs） of surface soils （2.52-15.2） were 3.to 13.times higher than the reference soils. In metal accumulated soils, exchangeable plus carbonate-bound fractions accounted for more than 10% of the total Zn, Pb, and Cd. The saturation degree of metals （SDM） in soils within 1.5 km of the smelter （averaging 1.25） was six times higher than that of the reference soils （0.209）. A smaller soil microbial biomass was found more frequently in metal accumulated soils （85.1-43. μg C g^-1） than in reference soils （497 μg C g^-1）, and a negative correlation （P 〈 0.01） of soil microbial biomass carbon to organic carbon ratio （Cmic/Corg） with SDM was observed. Microbial consumption of carbon sources was more rapid in contaminated soils than in reference soils, and a shift in the substrate utilization pattern was apparent and was negatively correlated with SDM （R = -0.773. P 〈 0.01）. Consequently, dust deposited Pb, Zn, and Cd in soils from zinc smelting were readily mobilized, and were detrimental to soil quality mainly in respect of microbial biomass .

关键词： composite pollution index heavy metals microbial biomass saturation degree of metals sequential extrac- tion

Determination of disperse elements in black shale by inductively coupled plasma mass spectrometry

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chinese Science Bulletin 1999年第S2期44卷 173-174页

作者： QI Liang, HU Jing and DENG Hailing institute of geochemistry Ore Deposit Open Laboratory, chinese academy of sciences,{3., China institute of geochemistry Ore Deposit Open Laboratory Chinese Academy of Sciences Guiyang 550002 China

THE elements Se, Te, Ge, Re are easily evaporated out when HClO4, HNO3. HF are used as the opendigestion method. There is a great amount of organic and inorganic carbon in black shale, so it is necessary to use oxide ... 详细信息

THE elements Se, Te, Ge, Re are easily evaporated out when HClO4, HNO3./sub>, HF are used as the opendigestion method. There is a great amount of organic and inorganic carbon in black shale, so it is necessary to use oxide acid （HClO4, HNO3./sub>） to digest the samples, and the Cl will interfere the determinationof Se and Ge. In this note we reported a simple digestion method for black shale. The sample was digested with HNO3./sub> and HF in PTFE pressure bomb at 190 for 3.h, the rest HF was reacted with HBO, toprotect the introduction system of ICP-MS. After digestion, the samples were determined directly by ICP-MS. So the recoveries were better than the open digestion method. For 50 mg sample,1.5 mL HNO3./sub> and4 drops of HF can completely dissolve black shale. Inductively coupled plasma mass spectrometry has been successfully used for determination of As,Se, Te, bi in geological materials. In geological and biological samples, the concentrations of ele-

关键词： disperse elements black shale ICP-MS.

GRANITOIDS AND TETONIC EVOLUTION OF THE WEST KUNLUN OROGENIC BELT

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地学前缘 2000年第S1期7卷 228-229页

作者： Wang Yuanlong 1,bi Hua 2, Wang Zhonggang 2, Zhu Xiaoqing 2 (1.institute of Geology And Geophysics, chinese {3. of Science, Beijing 100029,China 2 institute of geochemistry, chinese {3. of Science, guiyang 550002,China)

The West Kunlun orogenic belt, one of the least studied areas in China, is located at the junction between the Qinghai—Tibetan Plateau and Tarim Basin and has undergone intense tectonic action and frequent *** West Kunlun orogenic belt can be divided into five tectonic\|magmatic evolution stages according to the character of the igneous rocks, metamorphic rocks, sedimentation mode, tectonic phases and isotopic ages(Fig 1).Active stages have dominated with only short intervening stable stages. This kind of evolution is not simply repeated but that a later stage is elevation and development of its former ***\|time distribution of granitoids varies with each different tectonic\| magmatic stage as well as within different periods of the same tectonic\| magmatism stage. Take time into condition , It is an important turning movement of tectonics\|magmatism evolution during the Indo\|Sinian movement, as space the middle fault (Jiang Chunfa 1982) of the West Kunlun orogenic belt is a significant border o f tectonics\|magmatism evolution. Granitoids formed before Indo\|Sinian movement are mainly distributed to the north of the middle fault of West Kunlun. These granitoids are mostly granites of early and middle Proterozoic, Caledonian and Hercynian ages. A unique control on the granitoid evolution is that they become younger from NE to SW, crossing the regional structure line. Granitoids formed after Indo\|Sinian movement are mainly distributed to the south of the middle fault. But distribution of granitoids of early Yanshan cycle cut across the middle fault of West Kunlun Mountain. Their age distribution shows a bidirectional control with the granitoids becoming younger across the regional structural lines from NE and SW boundary fault to the interior of the fracture belts.

关键词： the West Kunlun orogenic belt tectonic\|magmatic evolution gr anitoids

Distribution of mercury species in water and sediments in Caohai Lake, Guizhou Province

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Acta Geochimica 2006年第S1期 153-154页

作者： Xiaoli QIAN1,2, Xinbin FENG1, Xiangyang bi1,3.1 State Key Laboratory of Environmental geochemistry, {3. of geochemistry{3., guiyang 550002, China 2 Guizou University, guiyang 550025, China 3.Graduate School of the chinese academy sciences, Beijing 10003.,China

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华南中生代陆内成矿作用

地学前缘 2024年第1期31卷 226-238页

作者：胡瑞忠高伟付山岭苏文超彭建堂毕献武中国科学院地球化学研究所矿床地球化学国家重点实验室贵州贵阳550081 中国科学院大学地球与行星科学学院北京100049

陆内成矿机制是全球性科学难题。华南陆块中生代成矿大爆发,成矿作用远离活动大陆边缘,形成西部金锑铅锌低温成矿省和东部钨锡多金属高温成矿省,是研究陆内成矿的理想场所。因为空间上的分离,两个成矿省长期被认为是互为独立的体系。研... 详细信息

陆内成矿机制是全球性科学难题。华南陆块中生代成矿大爆发,成矿作用远离活动大陆边缘,形成西部金锑铅锌低温成矿省和东部钨锡多金属高温成矿省,是研究陆内成矿的理想场所。因为空间上的分离,两个成矿省长期被认为是互为独立的体系。研究发现,西部低温成矿(23.~200 Ma、160~13. Ma)与东部高温成矿时代一致并显示类似的地球化学指纹,印支期陆内造山和燕山期软流圈上涌是其共有成矿驱动机制,两个成矿省是具有成因联系的整体,共同构成面状展布的巨型多金属陆内成矿区;成矿后华南从西向东剥蚀程度的增强控制了目前近地表矿西部低温、东部高温的空间分布格局,低温成矿省东部区域的深部可能存在高温钨锡多金属矿床。在此基础上,建立了定位于陆内岩石圈先存薄弱区、陆壳供给矿源、高低温矿并重、成矿面状展布从而明显区别于板块边缘成矿机制的华南陆内成矿新理论。

关键词：华南陆块高温成矿省低温成矿省陆内成矿机制

Mobility of heavy metals from tailings to stream waters in local zinc smelting activities contaminated site

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Acta Geochimica 2006年第S1期 41-42页

作者： Taoze LIU1,2 , Yuangen YANG1, Bangyu LIU1,2 , Xiangyang bi1,2 , Feili LI1,2 1 State Key Laboratory of Environmental geochemistry, institute of geochemistry,{3., guiyang 550002, China 2 Graduate School of the{3., Beijing 10003., China

OROGENESIS-BASINOGENESIS IN THE LUSHAN MOUNTAIN-POYANG LAKE, NORTH JIANGXI PROVINCE,CHINA

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Geotectonica et Metallogenia 1997年第Z2期21卷 43-54页

作者： bi Hua TAN Keren and WU Qianhong(institute of geochemistry, Academia Sinica, {3., {3., China)(Changsha institute of Geotectonics, Academia Sinica, Hunan, 410013. China)

Many scientists used to study orogenesis and basinogenesis separately, and thought that the Lushan Mountain-Poyang Lake, North Jiangxi province, only formed in the Quaternary. On the basis of analysis of the regional deep-tectonic setting and main geological characteristics, the orogenesis-basinogenesis in the Lushan Mountain-Poyang Lake as a whole was studied, and its congenital, parturient and postnatal conditions were mainly discussed. On the above basis, four stages of orogeneis -basinogenesis in the Lushan Mountain -Poyang Lake were recognized: the presinian basic, the Sinian-Early Permain dormant, the Late Permain-Early Tertiary embryonic and the Late Tertiary-Quaternary forming stage, and the kinematic-dynamic characteristics of orogenesis-basinogenesis at each stage were discussed.

关键词： Orogenesis-basinogenesis kinematic-dynamic characteristics Lushan Mountain-Poyang Lake