Geology, Geochronology, and Hf Isotopic Composition of the Pha Lek Fe Deposit, Northern Laos: Implications for Early Permian Subduction-Related Skarn Fe Mineralization in the Truong Son Belt

Geology, Geochronology, and Hf Isotopic Composition of the Pha Lek Fe Deposit, Northern Laos: Implications for Early Permian Subduction-Related Skarn Fe Mineralization in the Truong Son Belt

The Truong Son metallogenic belt in central Laos and Vietnam is an important Fe-Cu-Sn-Au polymetallic ore district. The Pha Lek Fe deposit is closely related to Late Carboniferous- Early Permian I-type granitic magmatism, and contains >50 Mt @ 45% to 50% of Fe ore. Ore minerals occur mainly as ma...

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Veröffentlicht in:Journal of earth science (Wuhan, China) China), 2019-02, Vol.30 (1), p.109-120
Hauptverfasser: Hou, Lin, Liu, Shusheng, Guo, Linnan, Xiong, Fuhao, Li, Chao, Shi, Meifeng, Zhang, Qiming, Xu, Siwei, Wu, Songyang
Format: Artikel
Sprache:eng
Schlagworte:
Biogeosciences
Carbonates
Carboniferous
Continental crust
Copper
Dating
Devonian
Earth and Environmental Science
Earth Sciences
Geochemistry
Geochronology
Geology
Geotechnical Engineering & Applied Earth Sciences
Gold
Hematite
Iron ores
Lead
Magma
Magnetite
Melting
Mineralization
Permian
Pyrite
Radiometric dating
Rhenium isotopes
Subduction (geology)
Tin
Triassic
Zircon
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Zusammenfassung:The Truong Son metallogenic belt in central Laos and Vietnam is an important Fe-Cu-Sn-Au polymetallic ore district. The Pha Lek Fe deposit is closely related to Late Carboniferous- Early Permian I-type granitic magmatism, and contains >50 Mt @ 45% to 50% of Fe ore. Ore minerals occur mainly as magnetite and hematite in the skarn alteration zone between a granitic pluton and metamorphosed Middle-Upper Devonian carbonates. The granitic pluton comprises granodiorite and granite, with zircon U-Pb dating indicating synchronous emplacement at 288.2±1.3 and 284.9±1.2 Ma, respectively. Zircons from these granitoids have ε Hf ( t ) values of 2.9-11.2 and relatively young T DM2 ages (
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-018-0864-7