Timing and Source of the Hermyingyi W-Sn Deposit in Southern Myanmar, SE Asia: Evidence from Molybdenite Re-Os Age and Sulfur Isotopic Composition

Hai Jiang; Shao-Yong Jiang; Wenqian Li; Kuidong Zhao

doi:10.1007/s12583-018-0860-y

Volume 30 Issue 1

Jan 2019

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Journal of Earth Science > 2019 > 30(1): 70-79.

Hai Jiang, Shao-Yong Jiang, Wenqian Li, Kuidong Zhao. Timing and Source of the Hermyingyi W-Sn Deposit in Southern Myanmar, SE Asia: Evidence from Molybdenite Re-Os Age and Sulfur Isotopic Composition. Journal of Earth Science, 2019, 30(1): 70-79. doi: 10.1007/s12583-018-0860-y

Citation:

Hai Jiang, Shao-Yong Jiang, Wenqian Li, Kuidong Zhao. Timing and Source of the Hermyingyi W-Sn Deposit in Southern Myanmar, SE Asia: Evidence from Molybdenite Re-Os Age and Sulfur Isotopic Composition. Journal of Earth Science, 2019, 30(1): 70-79. doi: 10.1007/s12583-018-0860-y

Citation:

Hai Jiang, Shao-Yong Jiang, Wenqian Li, Kuidong Zhao. Timing and Source of the Hermyingyi W-Sn Deposit in Southern Myanmar, SE Asia: Evidence from Molybdenite Re-Os Age and Sulfur Isotopic Composition. Journal of Earth Science, 2019, 30(1): 70-79. doi: 10.1007/s12583-018-0860-y

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Timing and Source of the Hermyingyi W-Sn Deposit in Southern Myanmar, SE Asia: Evidence from Molybdenite Re-Os Age and Sulfur Isotopic Composition

doi: 10.1007/s12583-018-0860-y

Hai Jiang^1,2,
Shao-Yong Jiang^{1,2
,
,},
Wenqian Li^{3
,
,},
Kuidong Zhao^1,2

1.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, Collaborative Innovation Center for Exploration of Strategic Mineral Resources, China University of Geosciences, Wuhan 430074, China
3.
Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

Funds:

The National Natural Science Foundation of China 41503043

The National Key R & D Program of China 2017YFC0602405

The MOST Special Fund from the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences MSFGPMR03-2

The National Natural Science Foundation of China 91755208

More Information

Corresponding author: Shao-Yong Jiang; Wenqian Li
Received Date: 18 Jul 2018
Accepted Date: 11 Oct 2018
Publish Date: 01 Feb 2019

Abstract

Abstract

The Hermyingyi W-Sn deposit, situated in southern Myanmar, SE Asia, is a typical quartz-vein type W-Sn deposit. The ore-bearing quartz veins are mainly hosted by the Hermyingyi monzogranite which intruded into the Carboniferous metasedimentary rocks of Mergui Series. According to mineral assemblages and crosscutting relationships, four ore-forming stages are recognized:(1) silicate-oxide stage; (2) quartz-sulfide stage; (3) barren quartz vein stage; (4) supergene stage. Five molybdenite samples from the deposit yield Re-Os model ages ranging from 67.8±1.6 to 69.2±1.6 Ma (weighted mean age of 68.7±1.2 Ma), and a well-defined isochron age of 68.4±2.5 Ma (MSWD=0.18, 2σ). This Re-Os age is consistent with the previously published zircon U-Pb age of the Hermyingyi monzogranite (70.0±0.4 Ma) (MSWD=0.9, 2σ) within errors, which indicates a genetic link between the monzogranitic magmatism and W-Sn mineralization. The new high-precision geochronological data reveal that the granitic magmatism and associated W-Sn mineralization in southern Myanmar took place during the Late Cretaceous (70–68 Ma). The extremely low Re contents (22.9 ppb to 299 ppb) in molybdenite, coupled with sulfide δ³⁴S values in the range of +1.9‰ to +5.6‰ suggest that ore-forming metals were predominately sourced from the crustal-derived granitic magma.
- Hermyingyi W-Sn deposit,
- molybdenite Re-Os dating,
- sulfur isotopes,
- Myanmar,
- SE Asia

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References(58)

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