An analysis of mineralogical characteristics and mineralization temperature of the Daxiao Pb-Zn deposit in Dongchuan, Yunnan Province

NONG Yangxia; GAO Jianguo; WANG Wenyuan; CHEN Xinbin

2017 Vol. 36, No. 6

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NONG Yangxia, GAO Jianguo, WANG Wenyuan, CHEN Xinbin. An analysis of mineralogical characteristics and mineralization temperature of the Daxiao Pb-Zn deposit in Dongchuan, Yunnan Province[J]. Geological Bulletin of China, 2017, 36(6): 1077-1087.

Citation:

NONG Yangxia, GAO Jianguo, WANG Wenyuan, CHEN Xinbin. An analysis of mineralogical characteristics and mineralization temperature of the Daxiao Pb-Zn deposit in Dongchuan, Yunnan Province[J]. Geological Bulletin of China, 2017, 36(6): 1077-1087.

An analysis of mineralogical characteristics and mineralization temperature of the Daxiao Pb-Zn deposit in Dongchuan, Yunnan Province

Department of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

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Corresponding author: GAO Jianguo, 335150686@qq.com

Received Date: 16 February 2016

Revised Date: 22 September 2016

Publish Date: 25 June 2017

Abstract

Abstract

The Daxiao Pb-Zn deposit is located on the secondary level uplift along the middle east part of the Kang-Dian axis, in Dongchuan, Yunnan Province.Its orebodies show veined and stratoid forms, and occur in interstratified crack and plume-like frac-ture of Wangchang Formation in Kunyang Group which lies in the south of Baihechang anticline.The ore minerals are composed of galena, native silver and a small quantity of sphalerite and pyrite, and the gangue minerals include quartz and calcite.Their textures mainly consist of euhedral-subhedral-anhedral granular texture, metasomatic relict texture and crystalloblastic texture, while main structures are disseminated structure, massive structure, banded structure and vein structure.Mineralization of this deposit could be di-vided into hydrothermal metallogenesis and supergenetic oxidation period, the former was made of three mineralization stages and the most important stage for Pb-Zn was the second stage, its metallogenic temperature ranged from 140℃ to 220℃, while metallogenic epoch was late Indosinian.Industrial ore was formed by the driving force of Indosinian movement that prompted activation-mix-ing-migration-accumulation of ore-forming elements to form the deposit.The genetic type of the ore deposit belongs to sedimenta-ry reformation hydrothermal ore deposit.
- geological characteristics of the deposit /
- mineralogical characteristics /
- mineralization /
- sedimentary reformation hydrother-mal ore deposits /
- Dongchuan

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