| 辽西医巫闾山变质核杂岩拆离断裂带金矿成矿构造物理特征 |
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| 引用本文：孟宪刚,邵兆刚,曲玮,王津,朱大岗.2005.辽西医巫闾山变质核杂岩拆离断裂带金矿成矿构造物理特征[J].地球学报,26(4):343-348. |
| DOI：10.3975/cagsb.2005.04.09 |
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| 基金项目:国土资源部定向基金项目“辽宁阜新地宫-建设金异常区控矿构造研究”（编号：98-04）;国土资源部科技司项目（编号：992049）;国土资源部地质力学开放研究实验室基金项目（编号：dlkf-9808） |
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| 中文摘要:本文通过对辽西医巫山变质核杂岩拆离滑脱带-韧性剪切带的动力变质温度、差应力、应变速率和成矿温度、压力和深度等方面的研究，进而探讨了该区金矿成矿的构造物理特征。利用声发射法得到区内7期历史最大主应力值；利用石英动态重结晶和亚颗粒法测量出区内变形岩石差应力值在13～48MPa之间；利用包裹体测温实测计算了排山楼金矿成矿温度在100～180℃、和210～346℃两个区间，岩石应变速率在10^-14s^4至10^-19s^4之间。阐明了金矿形成时的温压条件是该区岩石的形变-相变及成矿的决定性要素。 |
| 中文关键词:变质核杂岩 拆离断裂带 构造物理 医巫阊山 金矿 |
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| Tectonophysical Characteristics of Gold Deposits in the Detachment Zone of the Yiwulushan Metamorphic Core Complex |
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| Abstract:This paper deals mainly with the tectonophysical characteristics of gold deposits formed in the detachment-ductile shear zone of the Yiwulushan metamorphic core complex, such as the dynamical metamorphic temperature, differential stress, deformation rate and the ore-forming temperature, pressure and depth. The ES method reveals seven stages of historical maximum stress, and both dynamical recrystallization method and quartz sub-grain method yield the differential stresses ranging from 13 MPa to 48 MPa. Fluid inclusion measurement yields the ore-forming temperatures varying from 100 ℃ to 180 ℃ and 210 ℃ to 346 ℃, and the deformation rates are from 10-14s-1 to 10-19s-1. The results suggest that the temperature and pressure are two crucial factors that control the deformation of rocks and ore-forming process in this area. |
| keywords:metamorphic core complex detachment zone tectonophysics Yiwulushan gold deposit |
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