西北地质2018，Vol.51Issue(1)：13-22,10.
甘肃金川二矿区岩体橄榄石组构特征研究
Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province
摘要
Abstract
In No.2 mining area of the Jinchuan deposit,Gansu province,the olivine from maficultramafic rocks show the characteristics of minerals oriented arrangement.The fabric features of the olivines from lherzolite,plagioclase lherzolite and pyroxene dunite have been studied in this paper.The results show the characteristics of type-"A" [100] (010) fabric,the Nm [001] is the point maximum of the foliation and the slip direction is [001].Combined with the fabric characteristics of Ng [100] and Np [010],the slip plane should be the (100) and (010),and this belongs to the low temperature slip system ((100) [001] or (010) [001]).All of these characteristics mentioned above indicate that,these rocks may be formed under the shallow crust environment with low pressure and low stress state.The mafic-ultramafic rocks in the No.2 mining area were served as the products of the crystalline differentiation during the second stage of sulfide-bearing magma ascending in the Jinchuan deposit.Combined with the variation characteristics of tectonic stress field in this deposit,the olivine alignment has reflected the structure of the mineralization period,and the axis of olivine has a rotation from west to east.关键词
金川/二矿区/橄榄石/组构特征/应力分析Key words
Jinchuan/No.2 mining area/olivine/fabric features/stress analysis分类
天文与地球科学引用本文复制引用
王辰,刘建朝,王浩然,席志轩,冯伟,赵琳颍..甘肃金川二矿区岩体橄榄石组构特征研究[J].西北地质,2018,51(1):13-22,10.基金项目
中国地质调查局“整装勘查区深部找矿三维预测方法及示范研究”(12120113091400)、山东省地质调查项目“山东省三稀矿产资源潜力及找矿方向研究”(SDZS-2016-GTT01) （12120113091400）
