| Formation of Strata—bound Ore Deposits in China：Studies on Fluid Inclusions |
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| 引用本文： | 卢焕章,刘从强.Formation of Strata—bound Ore Deposits in China：Studies on Fluid Inclusions[J].中国地球化学学报,1990,9(4):347-360. |
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| 作者姓名： | 卢焕章 刘从强 |
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| 作者单位： | [1]UniversityofQuebecatChicoutimi,Canada [2]DepartmentofChemistry,UniversityofTokyo,Japan |
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| 摘 要： | Fluid inclusion studies were made on the basis of the geological data on the strata-bound ore de-posits of China including those of Pb,Zn,Au,Ag,Sb,U,Hg,W,quartz-crystal and sparry-calcite.An attempt was made to approach the model of formation for each type of ore depos-its by considering the material sources,the migration of fluids and the conditions of mineralization.It is found that ore-forming fluids (especially H2O)originate as heated underground water reacts with the wallrocks and dissolves Na^ ,Ca^2 ,K^ ,Cl^ ,HCl^- and Mg^2 .The ore fluids are mainly of NaCl-Ca-HCO3-H2O system with salinities ranging from 4to 14wt.%.NaCl equivalent and densities ranging from 0.9 to 1.0g/cm^3.It may be concluded that the deposits were formed at temperatures ranging from 150 to 250℃ under pressures from 300 to 1000 bars.Ore deposition may have been controlled by temperature and pressure or by the mixing among different fluids.
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| 关 键 词： | 金属矿床 流体包裹体 中国 铅 围岩 锌 成因 地质构造 金 银 |
Formation of strata-bound ore deposits in China: studies on fluid inclusions |
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| Lu Huanzhang,Liu Congqiang.Formation of strata-bound ore deposits in China: studies on fluid inclusions[J].Chinese Journal of Geochemistry,1990,9(4):347-360. |
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| Authors: | Lu Huanzhang Liu Congqiang |
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| Institution: | (1) University of Quebec at Chicoutimi, Canada;(2) Department of Chemistry, University of Tokyo, Japan;(3) Institute of Geochemistry, Academia Sinica, China |
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| Abstract: | Fluid inclusion studies were made on the basis of the geological data on the strata-bound ore deposits of China including
those of Pb, Zn, Au, Ag, Sb, U, Hg, W, quartz-crystal and sparry calcite. An attempt was made to approach the model of formation
for each type of ore deposits by considering the material sources, the migration of fluids and the conditions of mineralization.
It is found that ore-forming fluids (especially H2O) originate as heated underground water reacts with the wallrocks and dissolves Na+, Ca2+, K+, Cl+, HCl− and Mg2+. The ore-forming elements and other components including sulfur are derived mainly from the wallrocks. The ore fluids are
mainly of NaCl−Ca−HCO3−H2O system with salinities ranging from 4 to 14 wt.% NaCl equivalent and densities ranging from 0.9 to 1.0 g/cm3. It may be concluded that the deposits were formed at temperatures ranging from 150 to 250°C under pressures from 300 to
1000 bars. Ore deposition may have been controlled by temperature and pressure or by the mixing among different fluids. |
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