周浩,朱江建,林舸,曾乔松,汪树栋.广东河台金矿应力场演化研究[J].矿产勘查,2014,5(2):275-280 |
广东河台金矿应力场演化研究 |
Stress field revolution of the Hetai gold deposit, Guangdong |
投稿时间:2013-09-30 |
DOI: |
中文关键词: 河台金矿 糜棱岩 剪切应变 应力场 水平主压应力 |
英文关键词: Hetai gold deposit mylonite shear strain stress field horizontal principal compressive stress |
基金项目:老矿山项目(编号:121200113086300)资助。 |
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中文摘要: |
为了确立河台金矿应力场的演化模式,对河台金矿进行了糜棱岩化过程的数值模拟实验研究及节理产状的统计分析。Reidel简单剪切系统模式表明河台金矿糜棱岩化期受到略大于100°方位的水平主压应力,数值模拟研究则确立了糜棱岩化期受到108°方位的水平主压应力。河台金矿糜棱岩化之后的水平主压应力表现为两期,一期的水平主压应力方位为90°~114.5°;另一期的水平主压应力方位为162.5°。其中90°~114.5°方位的水平主压应力表现为继承了糜棱岩化时期应力场的特征,推断其形成时间早于162.5°方位的水平主压应力。 |
英文摘要: |
In order to study the stress field revolution of the Hetai gold deposit, the authors carried out numerical simulations on mylonitization process and statistical analysis of joint structures. In terms of Reidel's model, the horizontal principal compressive stress is a little more than 100°. Based on numerical simulations, the horizontal principal compressive stress is 108°, which is consistent with the result of Reidel's model. After the mylonitization, there are two stages of the stress field. One of the horizontal principal compressive stresses is along 90°~114.5°, the other is along 162.5°. The horizontal principal compressive stress of 90°~114.5° is consistent with the horizontal principal compressive stress of mylonitization (108°~288°) and it should be earlier than the horizontal principal compressive stress of 162.5°. |
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