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Sulfur isotopic composition of Yellow and Yangtze rivers and uplift of the Qinghai-Xizang Plateau

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Chinese Science Bulletin 1999年第S2期44卷 120-122页

作者： HONG Yetang, GU Ailiang, WANG Hongwei and HONG Bing State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE sulfur isotopic composition of dissolved sulfate in any rivers has been recognized as a mixture of thesulfur derived from the soil, bedrock and the atmosphere. The measurement of the sulfur isotopic composition in a river water can provide background information on the biogeochemical cycling of sulfur in theriver basin. So far, however, little work has been done on sulfur isotope in the watersheds of the majorrivers of the world. In particular, no information of the sulfur isotope of the major rivers in Asian conti-

关键词： sulfur isotopic composition Yellow and Yangtze rivers uplift Qinghai-Xizang Plateau.

The source of CO_2 in lamprophyres from Laowangzhai gold orefield, Yunnan Province, China

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Chinese Science Bulletin 1999年第S2期44卷 201-203页

作者： HUANG Zhilong, LIU Congqiang and XIAO Huayun Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinses Academy of Sciences, Guiyang 550002. China Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinses Academy of Sciences Guiyang 550002 China

CARBONATES in lamprophyres have various occurrences. The source of CO2 in lamprophyres provides animportant clue for us to understand the relationship between lamprophyres and gold *** et *** the C and O isotopic composition of various carbonates from Mesozoic lamprophyres in Transdanubian Range of Hungary, and suggested that the carbonates with different occurrences were different in origin. That is to say, the CO2 in lamprophyres has various sources. TheLaowangzhai gold deposits, Yunnan Province, China, is a typical orefield where lamprophyres are temporally and spatially related to gold mineralization. The CO2 contents of relatively fresh lampropyres from theorefield （the range of content is 5.10%-9.56%, averaging 7.45% ） are obviously higher than that ofprimary lamprophyres （about 0.5%）. Huang et *** that the CO2 in relatively fresh lam-

关键词： source of CO2 lamprophyres gold field Yunnan Province.

Mobility of elements during lamprophyre alteration and altered fluid characteristics in the Zhenyuan gold deposit

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Chinese Science Bulletin 1999年第S2期44卷 254-256页

作者： HUANG Zhilong, LlU Congqiang and XlAO Huayun Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

LAMPROPHYRES are one of the rock types which are easily subject to alteration. Alteration can not onlychange their texture and mineral assemblage, but also influence their geochemistry properties. The mostavailable data show that alteration will directly influence the content of Au in lamprophyre. For example,in the Superior area of Canada and the Yilgan area of Australia relatively fresh lamprophyres are bothlow in Au contents (3.9×10-9 and 1.7×10-9, respectively), but the contents of Au in altered lamprophyres from both areas are double increased (38×10-9 and 20×10-9 on average). Lamprophyres arewidely exposed in the Zhenyuan gold deposit, Yunnan Province and they are closely associated with goldmineralization both in space and in time. So the lamprophyres in the Zhenyuan gold deposit can be citedas the most typical example both at home and abroad. Lamprophyres in the mining district have undergonevarying-degree alteration and partly experienced mineralization. On the basis of the mass equilibrium e-

关键词： element mobility altered fluid lamprophyre Zhenyuan gold deposit.

Effects of fluids on migration of quartz——Experimental studies at low temperatures

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Chinese Science Bulletin 1999年第S2期44卷 55-57页

作者： XIAO Huayun~(1,2), HUANG Zhilong~(1,2), LIU Congqiang~1, ZHU Jianming~1 and WU Xueyi~(1,2) 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Open Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Open Laboratory of Ore Deposit Geochemistry Chinese Academy of Sciences Guiyang 550002 China

QUARTZ is present mainly as the species H4SiO4 in fluid. The currently accepted values for quartz solubility at low temperatures are low. At 300℃, quartz solubility is about 600×10-6 in the quartz-fluid system. Therefore, the migration of quartz should not be evident at low temperatures. However, thepresent note shows that quartz can be enriched and migrate significantly at 300℃. The solid/fluid ratio（S/F） of the experiments is only about 10 g/mL.

关键词： fluid migration of quartz experimental studies low temperature.

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 Geochemistry, Chinese Academy of Sciences, 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

Effect of Pb, Hg and Cd in soil on scavenging system of activated oxygen in tobacco leaves

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Chinese Science Bulletin 1999年第S2期44卷 91-93页

作者： YAN Chongling~(1,2), HONG Yetang~1, WANG Shijie~1, LIN Peng~3, YANG Xianke~2, FU Shunzhen~2, ZHU Keyong~2 and WU Shanqi~2 1. State Key Laboratory of Environmental Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Guizhou Institute of Environmental Protection, Guiyang 550002, China 3. Department of Biology, Xiamen University, Xiamen 361005, China State Key Laboratory of Environmental Geochemistry Chinese Academy of Sciences Guiyang 550002 China Guizhou Institute of Environmental Protection Guiyang 550002 China Department of Biology Xiamen University Xiamen 361005 China

Pb, Hg and Cd will affect human health by vegetative chain. In recent years, people more and more are concerned about heavy metal pollution of the soil-plant system. Many researchers studied the effect of single heavy metal on growth, photosynthesis, respiration and quality of plants, but few systematicstudies of the effect of heavy metals on the scavenging system of activated oxygen of plants. This note systematically studies the effect of Pb, Hg and Cd in soil on the scavenging system of activated oxygen in tobacco leaves. 1 Material and methods Material: Tobacco (Nicoticana tabacum L). Methods: Cultivating and measuring methods were according to reference. 2 Results Results of this study indicate that the common effect of Pb, Hg and Cd on activity of CAT is obvi-

关键词： Pb Hg and Cd scavenging system of activated oxygen tobacco.

GEODYNAMICS OF SUPERLARGE DEPOSITS IN CHINSES YUNNAN-GUIZHOU-GUANGXI ON THE EASTERN MARGIN OF THE QINGZANG PLEAUTAN

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地学前缘 2000年第S1期7卷 413-415页

作者： Fang Weixuan, Hu Ruizhong, Su Wenchao[WT5,5”BX](LOOG Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002,China)

Interest in the ore\|forming histories of basins has grown rapid since 1960 and is now intensive. The main reason behind the acceleration is the increasing awareness that the natural processes responsible for generating metal deposits in the sedimentary basin from the source rocks of the beneath the basin and intensively hydrothermal activity in the basin. Observations made in different continental margin basin systems and superlarge deposits in Chinese Yunnan\|Guizhou\|Guangxi Province on the eastern margin of the Qingzang (Himalaya—Karakoram—Tibet) were investigated in terms of geodynamics of basin formation. Geotectonically, the area is situated in the conjoint between the Tethys—Himalaya and the Marginal\|Pacific tectonic domain, characterized by very complex geological structure, typical basin\|mountain tectonics, abundant Superlarge deposits.

关键词： superlarge deposits geodynamics, extensional tectonics sedimentary basin mantle plume extension of lithosphere Chinese Yunnan\|Gui zhou\|Guangxi Province

Palaeoclimatic cycles and new glacial periods induced by the impact of extraterrestrial bodies

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Chinese Science Bulletin 1999年第S2期44卷 128-130页

作者： WANG Shijie, OUYANG Ziyuan, XIAO Zhifeng and LI Chunlai State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China. State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE consequence of "nuclear winter" induced by nuclear war and climatic catastrophe induced by extraterrestrial impact were widely studied for fear of the potential danger of the basic nuclear war (the totalexplosive equivalent 5 000Mt TNT). Using zero-dimensional energy balance model authors reportedthe short-term climatic effect induced by six huge Cenozoic bolide-impact events (65, 34, 15, 2.4,1.1, 0.73 MaBP). However, only the direct climatic effect of dusts yielded by the impact was considered in the previous study. In this note, based on the previous simulation results the effect of variance ofglobal reflectance with temperature on the long-term climatic change was further taken into *** with the strata records of palaeoclimatic change the relationship of impact energy with its in-

关键词： bolide impact events palaeoclimatic cycle formation of new glacial period simulating calculation Cenozoic.

Experimental study on the interaction between peat,lignite and germanium-bearing solution at low temperature

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Science China Earth Sciences 2005年第9期48卷 1411-1417页

作者： QI Huawen1,2, HU Ruizhong1 & QI Liang1 1. Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Department of Earth Science, Nanjing University, Nanjing 210093, China Key Laboratory of Ore Deposit Geochemistry Chinese Academy of Sciences Guiyang China Department of Earth Science Nanjing University Nanjing Chin

The interaction between peat, lignite and germanium(Ge)-bearing solution with an initial Ge concentration of 5 mg/L was studied at 25―100℃ and at pH 2.96―12.08. The results show that the apparent transfer ratios of peat and lignite for Ge in the solution were positively correlated with temperature in acid environment (initial pH=2.96), and the ratios (up to 86.5%) of lignite were obviously higher than those (up to 58.5%) of peat, but the organic transfer ratios of lignite were lower than those of peat. The activation energy values for interaction between peat, lignite and Ge-bearing solution are 30.96 and 15.67 kJmol?1, respectively. The strong acid (initial pH=2.96) and the strong alkaline (initial pH=12.08) environment contribute to the transfer of Ge in the solution. At 4

关键词： low temperature, peat, lignite, Ge4+, complexation.