| 灵丘小青沟银、锰矿床地质地球化学特征及矿床成因 |
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| 引用本文： | 余金杰,孟瑞发,李泽.灵丘小青沟银、锰矿床地质地球化学特征及矿床成因[J].矿床地质,1996,15(1):53-63. |
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| 作者姓名： | 余金杰 孟瑞发 李泽 |
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| 作者单位： | 中国地质科学院矿床地质研究所 |
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| 摘 要： | 小青沟银、锰矿床产于长城系高于庄组南北向破碎带中，属中低温热液矿床。本文研究了小青沟矿床地质、稳定同位素、微量元素特征、认识矿床成矿物质来源很复杂银来源于五台群、高于庄组白云质灰岩及次火山岩体，锰主要来源于高于庄组二段含锰灰岩。小青沟矿床经历了矿源层形成和燕山期成矿二个过程，作者建立了矿床的成矿模式。
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| 关 键 词： | 锰矿床 地球化学特征 银矿床 成因 |
Geological-geochemical characteristics and genesis of the Xiaoqinggou Ag-Mn deposit, Shanxi Province |
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| Abstract: | The Xiaoqinggou deposit, a large-sized Ag-Mn deposit, is present in a NS-trending fault within Gaoyuzhuang Formation. The ore-forming process can be divided into two epochs and three stages, with strong enclosing rock alteration. Sulfur isotopes suggest that sulfur mainly came from magma, with the entry of materials from inclosing rocks. Ore lead, quartz porphyry lead and dolomite lead of Changcheng System have similar and relatively stable composition, implying that they might have been derived from the lower crust with the addition of some mantle and orogen materials, Sources of ore-forming materials seem very complex. Ag mainly came from Wutai Group, Gaoyuzhuang Formation and subvolcanic rocks; Mn mainly came from the second section of Gaoyuzhuang Group. The formation of the Xiaoqinggou deposit embraces formation of the source bed and mineralization of Yanshanian period. lt is considered that the Xiaoqinggou deposit is a mesothermal-epithermal nydrothermal deposit related to subvolcanic rocks. A metallogenic model has been established in this paper. |
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| Keywords: | Xiaoqinggou deposit Geological and geochemical characteristics genesis |
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