| 马瑞.辽宁省营口地区玉隆铅锌矿床成因探讨[J].地质找矿论丛,1995,(3):33-42 |
| 辽宁省营口地区玉隆铅锌矿床成因探讨 |
| ORIGIN OF THE YULONG LEAD-ZINC DEPOSIT,YINGKOU, LIAONING, CHINA |
| 投稿时间：1995-04-06 修订日期：1995-06-29 |
| DOI：10.6053/j.issn.1001-1412.1995.3. 004 |
| 中文关键词: 角砾状矿床 高压区 低压区 构造控矿 |
| 英文关键词: |
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| 中文摘要: |
| 玉隆铅锌矿的成因是一个颇有争议的问题,笔者通过野外地质测量及矿区、矿点的详细研究,提出该矿的成因与构造有着密切的联系,其成矿物质的迁移和富集,均受特定的构造运动所制约,是前寒武纪构造控矿类型的典型范例。指出该角砾状铅锌矿的成矿过程实际上是成矿物质在压力梯度作用下活化重就位的过程。 |
| 英文摘要: |
| The Yulong lead-zinc deposit in Yingkou,Liaoning mainly comprises breccia ores. Understanding of its origin is of significance for Pb-Zn exploration in the Pb-Zn belt,eastern Liaoning. The breccia Pb-Zn ores are bosted in the banded tremolite marbles in Dashiqiao formation, Liaohe Group. Pb isotopic composition of galena suggested a ancient mormal lead source.with a model age of 1810 Ma,which is consistent with the age of the liaohe Group. Sulfur isotopic composition of the pyrite is analogous with the pyrite from other units in the Liaohe Group(8-14 per mille), suggesting sedimentary origin for the sulfides. The tremolite marbles are their hosting beds. The major structural controls on the ores are the mid-late Luliang Ductile-brittle structures which are marked by the W-E ductile compressional belts and flaniking parallel dilation zones. The ores are exclusively hosted in the dilation zones. Field and microscope work indicate that the W-E ductile compressional belts (high energy area)and the dilation zone (low energy area) were formed by intensive N-S compression during the mid-late Luliang orogeny. The dispersed metals in the source rocks were remobilized in the high energy areas and transported and precipitated in the low energy areas. Thus the mineralization resulted from remobilization under the influence of pressure gradients. |
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