GEOLOGICAL CHARACTERISTICS OF AND METALLOGENIC MODEL FOR LARGE-SCALE SAYAK COPPER ORE FIELD IN BALKHASH METALLOGENIC BELT, CENTRAL ASIA

CHEN Xuan-hua; WANG Zhi-hong; YANG Nong; CHEN Zheng-le; HAN Shu-qin

Volume 16 Issue 2

Jun. 2010

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Article Navigation > Journal of Geomechanics > 2010 > 16(2): 189-202

CHEN Xuan-hua, WANG Zhi-hong, YANG Nong, et al., 2010. GEOLOGICAL CHARACTERISTICS OF AND METALLOGENIC MODEL FOR LARGE-SCALE SAYAK COPPER ORE FIELD IN BALKHASH METALLOGENIC BELT, CENTRAL ASIA. Journal of Geomechanics, 16 (2): 189-202.

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GEOLOGICAL CHARACTERISTICS OF AND METALLOGENIC MODEL FOR LARGE-SCALE SAYAK COPPER ORE FIELD IN BALKHASH METALLOGENIC BELT, CENTRAL ASIA

1.
Key Laboratory of Neotectonic Movement & Geohazard, Ministry of Land and Resources, Beijijng 100081, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijijng 100081, China

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Abstract

Abstract

The Sayak ore field is the only area with the occurrence of large-scale skarn-type copper deposit in Balkhash metallogenic belt, Kazakhstan, Central Asia. In this paper the geological characteristics, ore-field structures and metallogenic model of Sayak ore field are described in detail. Sayak ore field is located in the Sayak graben-synclinorium, including several spatially isolated skarn copper deposits, porphyry Cu (Mo) deposits, Cu-Mo veins and a series quartz vein deposits, which consist of a metallogenic series with skarn-type and porphyry deposits as the two end deposits. The deposits in the ore-field are mainly located in the contact zone between the Middle Carboniferous limestones and the Late Carboniferous granitoids, with a special assemblage of skarn-type Cu-Au-Mo mineralizations. The metallogenic time of main copper deposits in Sayak ore-field is in the Middle to Late Hercynian, with the main and secondary metallogenic ages of 335±2 Ma and 308±10Ma, respectively. The ore bodies are mainly located in the saddle-top segments of locally developed anticlines in the graben-synclinorium, strongly controlled by the tectono-magmatism activities. The most relative granitoids with the copper metallogenesis in Sayak ore field are diorite with Cu content up to >1% and granodiorite up to >0.2%. The copper reserve in the Sayak ore field is estimated to be ~575 kt Cu.
- ore deposit geology,
- tectonic-magmatic activity,
- metallogenic model,
- Sayak ore field,
- Balkhash metallogenic belt

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References

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