Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province

WANG Chen; LIU Jianchao; WANG Haoran; XI Zhixuan; FENG Wei; ZHAO Linying

Northwestern Geology > 2018 > 51(1): 13-22.

WANG Chen, LIU Jianchao, WANG Haoran, et al. Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province[J]. Northwestern Geology, 2018, 51(1): 13-22.

Citation:

WANG Chen, LIU Jianchao, WANG Haoran, et al. Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province[J]. Northwestern Geology, 2018, 51(1): 13-22.

Citation:

WANG Chen, LIU Jianchao, WANG Haoran, et al. Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province[J]. Northwestern Geology, 2018, 51(1): 13-22.

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Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province

1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China;
2. No.2 Institute of Geological & Mineral Resources Survey of Henan, Zhengzhou 450001, Henan, China

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Received Date: March 26, 2017
Revised Date: September 13, 2017
Available Online: July 28, 2022
Published Date: March 04, 2018

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Abstract

Abstract

In No.2 mining area of the Jinchuan deposit, Gansu province, the olivine from mafic-ultramafic 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.
- Jinchuan,
- No.2 mining area,
- olivine,
- fabric features,
- stress analysis

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Fabric Characteristics of the Olivine from No.2 Mining Area in the Jinchuan Deposit, Gansu Province

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