| 张鹏程,刘如琦,郭万超.辽东地区前寒武纪地体金矿化特征[J].地质找矿论丛,2003,(1):21-28 |
| 辽东地区前寒武纪地体金矿化特征 |
| CHARACTERISTICS OF Au MINERALIZATION IN PRECAMBRIAN TERRANES OF LIAODONG REGION |
| 投稿时间：2002-05-21 修订日期：2002-10-08 |
| DOI：10.6053/j.issn.1001-1412.2003.1. 004 |
| 中文关键词: 辽东地区金矿床 地球化学特征 韧性剪切带 构造控矿 剪切动力成矿作用 辽宁省 |
| 英文关键词:Au deposits in Liaodong region geochemical characteristics ductile shear zone structural control on ore deposit shearing dynamic metallogeny Liaoning province |
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| 中文摘要: |
| 辽东地区金矿床主要分布在丹东、青城子、营口—盖县、清原等4个金矿化集中区(带).S,Pb同位素特征显示金矿的成矿物质主要来源于下地壳和上地幔.成矿流体中的CO2与金矿成矿关系密切,在成矿过程中流体的盐度较低,且由弱酸性向弱碱性变化,金矿多为中低温矿床.韧性剪切带对金矿化的空间分布显示出多级有序的控制作用,同时对金矿的矿床类型和矿化类型也表现出显著的控制作用,构造应变场和地球化学场的改变,促使成矿元素迁移富集而形成金矿.研究认为,在元古宇分布区,在深部寻找脆韧性变形带中的金矿仍然具有较大远景,同时要注意寻找与BIF建造有关的金矿新类型. |
| 英文摘要: |
| Gold deposits in Liaodong region are mainly concentrated in Dandong, Qingchengzi, Yingkou-Gaixian and Qingyuan areas. S, Pb isotope analysis reveals ore materials from lower crust and upper mantle. Au ore formation is closely related to CO2 in the ore fluid which is in low salinity and changed from weak acidity to weak alkalinity. The Au deposits belong to mesothermal type. Shear zone orderly controls Au mineralization in multiple stages and obviously controls types of Au mineralization and deposit. Change of the strain field and geochemistry with shearing dynamics makes ore elements concentration to ore. Results of study in the paper imply big potentiality for Au ore exploration in ductile-brittle shear zones to depth and attention should be paid to Au deposits related to banded iron formation (BIF) in Liaodong region. |
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