Thermal History of the Naruo Porphyry Deposit in the Duolong Ore District, Western Tibet: Evidence from U-Pb, 40Ar/39Ar and (U-Th)/He Thermochronology

被引：7
作者：
Yang, Huanhuan [1 ]
Fang, Xiang [2 ]
Song, Yang [1 ]
Lin, Bin [1 ]
LI, Yanbo [3 ]
Wang, Qin [4 ]
Liu, Zhibo [1 ]
He, Long [5 ]
Zhang, Qi [6 ]
Fu, Xuelian [4 ]
机构：
[1] Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
[2] Chinese Acad Geol Sci, Beijing 100037, Peoples R China
[3] 5 Geol Brigade Tibet Bur Geol & Mineral Explorat &, Golmud 816000, Qinghai, Peoples R China
[4] Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China
[5] 606 brigade Sichuan Met Geol Explorat Bur, Chengdu 611730, Peoples R China
[6] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
来源：
ACTA GEOLOGICA SINICA-ENGLISH EDITION | 2022年 / 96卷 / 06期
基金：
中国国家自然科学基金;
关键词：
U-Pb age; 40Ar; 39Ar; (U-Th); He; magmatic-hydrothermal history; Naruo porphyry deposit; Tibet; MAGMATIC-HYDROTHERMAL EVOLUTION; CU-AU; CRETACEOUS MAGMATISM; ACCRETIONARY WEDGE; TECTONIC EVOLUTION; METALLOGENIC BELT; COPPER-DEPOSIT; AREA EVIDENCE; RE-OS; EXHUMATION;
D O I：
10.1111/1755-6724.14955
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The Naruo porphyry copper deposit containing more than 2 Mt of copper is located in the Duolong ore district in the west of the Bangongco-Nujiang belt in central Tibet. New zircon U-Pb, biotite 40Ar/39Ar, zircon (U-Th)/He ages, published age data together with thermal modeling were presented in this paper to investigate the thermal history of Naruo deposit. Thermal modeling reveals a prolonged magmatic-hydrothermal evolution firstly cooling from similar to 700 degrees C to similar to 350 degrees C at 120 Ma, then cooling to 230 degrees C at 106 Ma and maintaining at 200 degrees C from 106 to 90 Ma which is attributed to multiple magmatic events and thermal effect of strike-slip fault. Affected by thrust nappe structure, the sample was consistent with 120 degrees C from 70 to 63 Ma. The Naruo deposit started to experience exhumation at a rate of similar to 0.07 km/Myr since 60 Ma which is related to India-Asia collision. The prolonged magmatic-hydrothermal evolution process might have important influence on the Naruo deposit. The ore-related intrusions preserved in the foot walls of strike-slip fault and thrust nappe structure are the objects of future exploration in the Duolong ore district.
引用
收藏
页码：2015 / 2027
页数：13
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