| 与花岗岩有关的绿岩带再生型金矿床特征——以华北陆块北缘中段为例 |
| |
| 引用本文： | 沈保丰,李俊建,翟安民,曹秀兰.与花岗岩有关的绿岩带再生型金矿床特征——以华北陆块北缘中段为例[J].地质调查与研究,2001,24(3):129-144. |
| |
| 作者姓名： | 沈保丰 李俊建 翟安民 曹秀兰 |
| |
| 作者单位： | 天津地质矿产研究所,天津,300170 |
| |
| 基金项目： | 国土资源部科技攻关项目 (95 - 0 2 - 0 0 3)资助 |
| |
| 摘 要： | 华北陆块北缘中段广泛分布太古宙绿岩带 ,同时也是我国中生代岩浆活动最发育的地区。中生代强烈的陆内造山运动 ,对区内早期的绿岩带和其中的金及金矿床进行强烈的活化改造 ,形成壳源深熔花岗岩和有关的再生型金矿床。文中详细论述了区内与壳源深熔花岗岩有关的绿岩带再生型金矿床的地质特征 ,花岗岩和金矿床与太古宙绿岩带密切的空间分布和成因关系 ,并讨论了金矿的成矿模式。与成矿有关的花岗岩是造山带的产物 ,岩石富碱质、属钙碱性系列 ,形成深度较浅 ,塑性流变弱 ,常具似斑状结构 ,岩体常为多期次侵入 ,岩性多样 ,分异好 ,岩脉发育。硫、铅同位素组成显示花岗岩、金矿床和绿岩带具有亲缘关系。成矿流体富氯和富硫 ,盐度变化较大。金矿床形成在燕山早、中期。
|
| 关 键 词： | 华北陆块北缘中段 绿岩带 花岗岩 再生型金矿床 |
| 文章编号： | 1007-6956(2001)03-0129-16 |
| 修稿时间： | 2001年6月29日 |
The Characteristics of the Green Belt Regenerated Gold Deposits Related with Granite in the Middle North Margin of North China Block |
| |
| SHEN Bao-feng,LI Jun-jian,ZHAI An-min,CAO Xiu-lian.The Characteristics of the Green Belt Regenerated Gold Deposits Related with Granite in the Middle North Margin of North China Block[J].Geological Survey and Research,2001,24(3):129-144. |
| |
| Authors: | SHEN Bao-feng LI Jun-jian ZHAI An-min CAO Xiu-lian |
| |
| Abstract: | The Archean green belts are extensively distributed in the middle north margin of North China Block. And Mesozoic granite also well developed in the area. With the intense intracontinental orogenic movement in Mesozoic, the early green belts and the gold deposits have been reworked strongly, and formed crustal anatectic granite and regenerated gold deposits. The granite is rich in alkali, belonging to calc alkelic rock. It formed shallowly with weak plastic rheology and porphyroblastic like texture. The granites intruded multiplely with differentiation, and dikes develop well too. The compositions of and Pb apear that the granites and gold deposits have the relative relationship with the green belts. The salinity of the ore forming fluid changed frequently with much Cl and S in it. The mineralization era is in early and middle of Yanshang period. The modle of mineralization is disscuted in the paper. |
| |
| Keywords: | the middle morth margin of North China Block green beld granite regenerated gold deposit |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
