1. Differential exhumation histories between Qulong and Xiongcun porphyry copper deposits in the Gangdese copper metallogenic Belt: Insights from low temperature thermochronology
- Author
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Yalin Li, Jingen Dai, Ju-Xing Tang, Chengshan Wang, Aorigele Zhou, and Han-Ao Li
- Subjects
020209 energy ,Geochemistry ,chemistry.chemical_element ,Geology ,02 engineering and technology ,010502 geochemistry & geophysics ,Fission track dating ,01 natural sciences ,Copper ,Two stages ,Apatite ,Porphyry copper deposit ,Thermochronology ,chemistry ,Geochemistry and Petrology ,visual_art ,0202 electrical engineering, electronic engineering, information engineering ,visual_art.visual_art_medium ,Prospecting ,Economic Geology ,0105 earth and related environmental sciences ,Zircon - Abstract
The Qulong and Xiongcun porphyry deposits in the Gangdese Copper (Molybdenum) Metallogenic Belt (GCMB) are both giant porphyry deposits. They were located in the eastern and the central GCMB (about 400 km apart), and were generated in the Miocene and the Jurassic, respectively. In order to reveal why the two asynchronous deposits could occur in the same metallogenic belt, the in-situ zircon U-Pb, zircon and apatite fission track (ZFT and AFT), and apatite (U-Th)/He (AHe) dating were conducted. Their associated exhumation amounts and histories were compared, and finally the prospecting significance was evaluated. AHe ages of the Qulong deposit indicate it underwent an amount of at least 1.3–2.8 km exhumation since 13.8–13.1 Ma. However, AFT data and modeling results reveal that the Xiongcun deposit experienced two stages of rapid cooling at 20–13 Ma and 13–8 Ma, respectively. The temperature decreases from 160 °C to 40 °C after ∼20 Ma and the corresponding exhumation amount is about 4–6 km. Integrated the regional thermochronological data, exhumation amounts of 4–6 km and
- Published
- 2019
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