| 西秦岭马脑壳金矿床构造变形特征 与成矿关系研究 |
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| 引用本文： | 王良果,陈龙,张华,蒲刚,赵军,陈中操,蒋尚志.西秦岭马脑壳金矿床构造变形特征 与成矿关系研究[J].地质科学,2019,54(4):1383-1398. |
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| 作者姓名： | 王良果 陈龙 张华 蒲刚 赵军 陈中操 蒋尚志 |
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| 作者单位： | 重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100;重庆市地质矿产勘查开发局205地质队 重庆永川 402100 |
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| 基金项目： | 重庆市地质矿产勘查开发局205地质队项目资助 |
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| 摘 要： | 马脑壳金矿床构造变形复杂且研究薄弱，作者通过野外地质填图并结合矿山生产勘探，以构造解析为研究方法，对马脑壳金矿床的变形特征与金成矿关系进行了研究。构造解析表明区内地层在成岩期遭受了同生变形，成岩后先后遭受了NE-SW向的挤压褶皱逆冲变形（T33]）、左行走滑变形并伴随伸展塌陷变形（J1-2），宏观上表现为推覆—走滑控矿，即印支末期推覆作用形成的变形样式整体控制着金矿体的产出和分布，后期走滑作用叠加改造导致的张性破裂样式控制着金矿化强度，成矿作用主要发生在左行走滑变形阶段（J1-2），成矿机制是燕山早中期（J1-2）西秦岭地区由强烈的挤压动力体制向弥散间隔密集的走滑动力体制转换，导致含矿热液沿构造薄弱带（如区内F2断裂）上升迁移并在构造动力体制转换强烈的区域发生大规模金沉淀。西秦岭地区和松潘—甘孜地区的微细浸染型金矿极有可能形成于燕山早期（J1-2）由挤压向走滑构造动力体制转过程中。
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| 关 键 词： | 构造变形特征 构造动力体制转换 金矿床 马脑壳 西秦岭 |
| 收稿时间： | 2019-04-11 |
The relationship between deformation characteristics and metallogenesises of Manaoke gold deposit in western Qinling Mountains |
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| Wang Liangguo Chen Long Zhang Hua Pu Gang Zhao Jun Chen Zhongcao Jiang Shangzhi.The relationship between deformation characteristics and metallogenesises of Manaoke gold deposit in western Qinling Mountains[J].Chinese Journal of Geology,2019,54(4):1383-1398. |
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| Authors: | Wang Liangguo Chen Long Zhang Hua Pu Gang Zhao Jun Chen Zhongcao Jiang Shangzhi |
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| Institution: | 205.Geological Team of Chongqing Geological and Mineral Exploration and Development Bureau, Yongchuan, Chongqing 402100 |
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| Abstract: | The deformation characteristics of the Manaoke gold deposit in Northwest Sichuan is complex and research weak. This paper analysis the relationship of deformation characteristics and metallogenesises by regional geological survey and productive exploration. The deformation structural revealed the diagenesis suffered the contemporaneous deformation, after that suffered the compression of NE-SW direction, sinistralstrike-slip and extensional collapse in turn, so the lithofacies transformation was obvious in the study area. Macroscopically, the orebodies are jointly controlled by nappe structures and translation structures, the deformation patterns formed by nappe controlled that output and distribution of gold orebodies, the deformation patterns by translation controlled that mineralization intensity of gold. Therefore, the gold mineralization mainly occurs in the stage of left strike-slip deformation, the metallogenic mechanism is that compressive deformation changes to strike-slip deformation, which results in the upward migration of ore-bearing hydrothermal fluid and large-scale gold precipitation. The micro-disseminated gold deposits in southern Qinling and Songpan-Garze are likely to be formed in the Early Yanshanian period（J1-2）during the transformation from compression deformation to strike-slip deformation. |
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