Late Paleozoic Concentrated Mineralization of Balkhash-Junggar Metallogenic Belt in the Western Part of the Central Asian Metallogenic Domain(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第03期
- Page:
- 285-305
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Late Paleozoic Concentrated Mineralization of Balkhash-Junggar Metallogenic Belt in the Western Part of the Central Asian Metallogenic Domain
- Author(s):
- CHEN Xuan-hua; CHEN Zheng-le; BAI Yan-fei; HAN Shu-qin; DING Wei-cui; LI Jiang-yu; SHI Wei; YE Bao-ying
- 1. SinoProbe Center, Chinese Academy of Geological Sciences, Beijing 100037, China; 2. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China; 3. Shanxi Hydroelectric Investigation and Design Institute, Taiyuan 030024, Shanxi, China; 4. Institute of Geological Survey, China University of Geosciences, Beijing 100083, China
- Keywords:
- Late Paleozoic; crustal growth; division of metallogenic belt; metallogenic series; mineralization; thermal-chronology; Balkhash-Junggar metallogenic belt; Central Asian metallogenic domain
- PACS:
- P612
- DOI:
- -
- Abstract:
- The Balkhash-Junggar metallogenic belt consists of Balkhash, West Junggar and East Junggar metallogenic belts in the western part of the Central Asian metallogenic domain. It is an important metallogenic belt with occurrence of many wellknown super-large and large porphyry Cu-Mo deposits (such as Kounrad, Aktogai, Borly and Baogutu), large skarn Cu deposits (such as Sayak), large rare metal deposits (such as East Kounrad, Zhanet and Akshatau) and large orogenic Au deposits (such as Hatu). Zircon U-Pb dating, Re-Os dating of molybdenite, 40Ar/39Ar thermochronology of hornblende, muscovite, biotite and K-eldspar, and fission track and (U-Th)/He dating of zircon and apatite and thermal history modeling, provide a multidisciplinary approach to constrain the whole thermo-history of metallic deposits from their formation in the deep to the exhumation in the surface. It reveals the arc-related granitic magmatism and the metallogenesis of skarn Cu, porphyry Cu-Mo, quartz-vein/greisen W-Mo and orogenic Au in Late Paleozoic, the medium-temperature regional cooling history in Late Paleozoic-Early Mesozoic, and the low-temperature exhumation of the deposits in Mesozoic. The timing combined with geochemistry of granitoids suggests a transition of tectonic environment from subduction and volcanic arc in Late Carboniferous to post-orogenic extension in Early Permian, and the concentrated mineralization of Cu, Mo, rare metals and Au during this tectonic transition. The complete metallogenic series for Late Paleozoic concentrated mineralization of Balkhash-Junggar metallogenic belt in the western part of the Central Asian metallogenic domain are skarn Cu, porphyry Cu-Mo, quartz-vein/greisen Mo-W, and orogenic (quartz-vein) Au deposits.
Last Update: 2016-06-02