| Control of relay structure on mineralization of sedimentary-exhalative ore deposit in growth faults of graben systems |
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| 作者姓名： | 奚小双 汤静如 孔华 何绍勋 |
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| 作者单位： | SchoolofGeoscienceandEnvironmentalEngineering,CentralSouthUniversity,Changsha410083,China |
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| 摘 要： | Abstract: Based on the study of ore deposits and orebody structures of two sedimentary-exhalative ore deposits,i.e. , Changba and Xitieshan Ore Deposits, it is found that the structural patterns of metallogenic basin of seaftoor exhalative sulfide deposits in the ancient graben systems are controlled by relay structures in normal faults. The shapes of metallogenic basins are composed of tilting ramp, fault-tip ramp and relay ramp, which dominate migration of gravity current of ore-hosted fluid and shape of orebody sedimentary fan in the ramp. By measuring and comparing the difference of length-to-thickness ratios of orebody sedimentary fan, the result shows that the occurrence of the ramp has a remarkable impact on the shape of orebody.
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| 关 键 词： | 矿床 继电器 正断层 盆地 |
| 收稿时间： | 28 October 2004 |
| 修稿时间： | 28 November 2004 |
Control of relay structure on mineralization of sedimentary-exhalative ore deposit in growth faults of graben systems |
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| Xi Xiao-shuang , Tang Jing-ru , Kong Hua and He Shao-xun.Control of relay structure on mineralization of sedimentary-exhalative ore deposit in growth faults of graben systems[J].Journal of Central South University of Technology,2005,12(3):340-345. |
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| Authors: | Xi Xiao-shuang Tang Jing-ru Kong Hua and He Shao-xun |
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| Affiliation: | (1) School of Geoscience and Environmental Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | Based on the study of ore deposits and orebody structures of two sedimentary-exhalative ore deposits,i. e. , Changba and Xitieshan Ore Deposits, it is found that the structural patterns of metallogenic basin of seafloor exhalative sulfide deposits in the ancient graben systems are controlled by relay structures in normal faults. The shapes of metallogenic basins are composed of tilting ramp, fault-tip ramp and relay ramp, which dominate migration of gravity current of ore-hosted fluid and shape of orebody sedimentary fan in the ramp. By measuring and comparing the difference of length-to-thickness ratios of orebody sedimentary fan, the result shows that the occurrence of the ramp has a remarkable impact on the shape of orebody. |
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| Keywords: | exhalative ore deposits growth fault in graben systems relay ramp in normal faults metallegenesis of basins |
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