气候变化领域集成服务门户(CCPortal): Mesozoic-Cenozoic tectonic evolution and metallogeny in Myanmar: Evidence from zircon/cassiterite U-Pb and molybdenite Re-Os geochronology

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DOI	10.1016/j.oregeorev.2018.10.009
	Mesozoic-Cenozoic tectonic evolution and metallogeny in Myanmar: Evidence from zircon/cassiterite U-Pb and molybdenite Re-Os geochronology
	Li, Jin-Xiang; Zhang, Li-Yun; Fan, Wei-Ming; Ding, Lin; Sun, Ya-Li; Peng, Tou-Ping; Li, Guang-Ming; Sein, Kyaing
通讯作者	Li, JX (通讯作者)
发表日期	2018
ISSN	0169-1368
EISSN	1872-7360
起始页码	829
结束页码	845
卷号	102
英文摘要	It is well known that there are many Sn-W-Mo and Cu-Au metal resources in Myanmar. However, the absence of precise mineralization ages for these deposits significantly hinders to understand the close genetic relationship among metallogeny, ore-bearing intrusions, and tectonic evolution. In this study, two groups of consistent molybdenite Re-Os and zircon U-Pb ages indicate that the Dapingba Mo-W deposit in northern Myanmar (Tengchong terrane) formed at Early Cretaceous (similar to 119 Ma and similar to 114 Ma). The Dapingba ore-bearing granitic magmas were mainly derived from melting of ancient Tengchong crust on the basis of zircon Hf isotopic compositions (epsilon Hf(t) = 9.3 to 2.5). Moreover, the first reported cassiterite U-Pb ages of similar to 60 Ma for the Bawapin and Kalonta Sn-W deposits in southern Myanmar (western Sibumasu terrane) suggest that the two deposits formed at Paleocene. Whereas the precise molybdenite Re-Os age for the Shangalon porphyry Cu-Au deposit in the West Burma terrane indicates that this deposit formed at Eocene (similar to 39 Ma). Importantly, combined with previous studies on tectonic evolution and magmatic petrogenesis in Myanmar and southwest China, a comprehensive Mesozoic-Cenozoic tectono-magmatic and metallogenic model are proposed. Two periods of Early Cretaceous (similar to 120-114 Ma) and Late Cretaceous (similar to 75-70 Ma) crust-derived felsic melts and related Mo-Sn-W deposits from the Tengchong and western Sibumasu terranes likely formed in a continental arc during subduction of the Meso- and Neo-Tethys oceanic lithosphere, respectively. Subsequently, Paleocene-Eocene (similar to 60-50 Ma) Sn-W deposits and coeval ore-bearing granites in the western Sibumasu terrane possibly formed during roll-back of the Neo-Tethys oceanic slab. After similar to 50 Ma India-Asia collision, Eocene (similar to 41-39 Ma) porphyry Cu-Au (West Burma terrane) and Sn-W deposits (western Sibumasu terrane) likely formed during the Neo-Tethys oceanic slab tear and break-off in a collisional setting. Whereas Miocene (similar to 19-14 Ma) high sulfidation epithermal Cu deposit in the West Burma terrane possibly formed in an arc setting during oblique subduction of the Indian oceanic lithosphere.
关键词	HF ISOTOPIC CONSTRAINTS LATE CRETACEOUS MAGMATISM ZIRCON REFERENCE MATERIAL PORPHYRY COPPER BELT A-TYPE GRANITES SOUTHERN TIBET WESTERN MYANMAR TENGCHONG BLOCK CALC-ALKALINE TIN BELT
英文关键词	Mesozoic-Cenozoic; Geochronology; Metallogeny; Tectonic evolution; Myanmar
语种	英语
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000453493100042
来源期刊	ORE GEOLOGY REVIEWS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259247
推荐引用方式 GB/T 7714	Li, Jin-Xiang,Zhang, Li-Yun,Fan, Wei-Ming,et al. Mesozoic-Cenozoic tectonic evolution and metallogeny in Myanmar: Evidence from zircon/cassiterite U-Pb and molybdenite Re-Os geochronology[J]. 中国科学院青藏高原研究所,2018,102.
APA	Li, Jin-Xiang.,Zhang, Li-Yun.,Fan, Wei-Ming.,Ding, Lin.,Sun, Ya-Li.,...&Sein, Kyaing.(2018).Mesozoic-Cenozoic tectonic evolution and metallogeny in Myanmar: Evidence from zircon/cassiterite U-Pb and molybdenite Re-Os geochronology.ORE GEOLOGY REVIEWS,102.
MLA	Li, Jin-Xiang,et al."Mesozoic-Cenozoic tectonic evolution and metallogeny in Myanmar: Evidence from zircon/cassiterite U-Pb and molybdenite Re-Os geochronology".ORE GEOLOGY REVIEWS 102(2018).