| “金三角”地区砂金矿富集规律及成矿模式研究 |
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| 引用本文： | 邵晓东.“金三角”地区砂金矿富集规律及成矿模式研究[J].地质与资源,2000,9(3):144-148. |
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| 作者姓名： | 邵晓东 |
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| 作者单位： | 沈阳地质矿产研究所, 辽宁 沈阳 110032 |
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| 摘 要： | "金三角"地区砂金矿主要分布于6个岩金矿集中区附近,勉县-平武深大断裂带附近,NW-NNW向次级裂隙带与主干深大断裂带的交汇部位,本区西北部的中低山区向东南部的低山丘陵区转换的部位,支流与干流交汇部位的下方,石英脉发育地区附近的水系中;成矿模式是高含金地质体→外动力改造高含金地质体,使金物质脱离母体呈显粒金、胶体金、悬浮金以及离子金等形式→由高位搬运迁移到沟谷水系中,迁移过程中显微粒金可有部分转化为显粒金→在沟谷水系中沉积成矿→再改造进行搬运迁移到现在的位置形成规模砂金矿床.
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| 关 键 词： | 砂金 分布规律 成矿模式 陕、甘、川接壤地区 |
| 文章编号： | 1002-4182(2000)03-0144-05 |
| 收稿时间： | 2000-05-09 |
| 修稿时间： | 2000年5月9日 |
STUDY ON THE CONCENTRATION REGULARITY AND METALLOGENICMODEL OF PLACER GOLD DEPOSITS IN THE "GOLDEN TRIANGLE" AREA |
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| SHAO Xiao-dong.STUDY ON THE CONCENTRATION REGULARITY AND METALLOGENICMODEL OF PLACER GOLD DEPOSITS IN THE "GOLDEN TRIANGLE" AREA[J].Geology and Resources,2000,9(3):144-148. |
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| Authors: | SHAO Xiao-dong |
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| Institution: | Shenyang Institute of Geology and Mineral Resources, Shenyang 110032, China |
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| Abstract: | The placer gold deposits of the "golden triangle" area are distributed mainly in the followingpositions: 1) near the Mianxian-Pingwu deep-large fault zone; 2) the intersection of NW-trending subsidiaryfractural zone and the major deep-large fault zone; 3) the transforming position of northwestern low-to-middlemountainous area to southeastern hills; 4) the lower parts of the intersection of main stream and branches; and 5) the drainage near the developed area of quartz veins. The metallogenic model is as follow: high gold-containing geologic body→reformed by ectodynamic process, gold separated from its parent and occurred asfine-grained gold partly transferred from micrograined to fine-grained→deposited in drainage→reformed andmigrated to the present position, and formed placer gold deposit with certain scale at last. |
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| Keywords: | placer gold distribution metallogenic model junction area of Shaanxi Gansu and Sichuan Provin |
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