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author:

Xiao, Zheng (Xiao, Zheng.) [1] | Zheng, Jiahao (Zheng, Jiahao.) [2] (Scholars:郑佳浩) | Zhao, Junfeng (Zhao, Junfeng.) [3] | Chen, Juan (Chen, Juan.) [4] | Wu, Xiaolin (Wu, Xiaolin.) [5] | Liu, Wenyuan (Liu, Wenyuan.) [6] (Scholars:刘文元) | Lu, Lin (Lu, Lin.) [7]

Indexed by:

EI Scopus SCIE

Abstract:

The Hebaoshan gold deposit (41.5 t Au @ 3.5 g/t) is located in the southeastern region of the South China Block, central part of the Wuyishan metallogenic belt. The ore-hosting rocks in this area are predominantly Precambrian metasedimentary rocks and Caledonian granitic rocks. Two hydrothermal mineralization stages can be distinguished: a quartz-sericite-pyrite-native gold (stage I) and a chlorite-quartz-sericite-chalcopyrite-electrum (stage II), with hydrothermal monazite and rutile are firstly identified in separate stages. The complex geological history of the region has resulted in ongoing debates regarding the age of gold mineralization and the genesis of the major gold deposits in this area. In order to precisely constrain the mineralization age of the deposit and further establish a genetic model for the ore deposit, LA-ICP-MS U-Pb dating and trace element analysis on accessory minerals were conducted. Based on the textures mineral assemblages, and geochemical features of the accessory minerals, magmatic apatite, hydrothermal rutile, and both magmatic and hydrothermal monazite were identified. The U-Pb ages of magmatic apatite and monazite are determined to be 445.3 f 15.80, 441.3 f 15.10 Ma and 446.57 f 1.03 Ma, respectively, suggesting that these ages represent the emplacement ages of the Caledonian intrusive rocks. The ages of hydrothermal monazite and hydrothermal rutile are determined to be 238.46 f 2.01 Ma (single-mineral analysis), 238.46 f 2.01 Ma (in-suit analysis) and 179.54 f 7.28 Ma, respectively, suggesting that represent two mineralization events during the Late Triassic to early Jurassic in the Hebaoshan area. These data provide new constraints on the mineralization process in the Hebaoshan deposit and excludes the link between gold mineralization and the intrusion of the Caledonian granites. Regionally, It is speculated that the two mineralization events at Hebaoshan are respectively associated with intracontinental orogenic movements between the Yangtze Block and Cathaysia Block, the flat-slab subduction of the PaleoPacific Plate (stage I), and the subsequent extensional tectonics related to the collision between the Yangtze Block and Cathaysia Block (stage II). Our study indicates that the timing of multiple episodic mineralization can be constrained by analysis of accessory minerals, which provides a geological basis for better genetic model for the deposit and provide geological evidence for unraveling the relationships between magmatic activities and mineralization events in the region.

Keyword:

Apatite Hebaoshan Gold deposit Monazite Rutile U-Pb dating

Community:

  • [ 1 ] [Xiao, Zheng]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 2 ] [Zheng, Jiahao]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 3 ] [Chen, Juan]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 4 ] [Liu, Wenyuan]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 5 ] [Zhao, Junfeng]Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
  • [ 6 ] [Zhao, Junfeng]Univ Chinese Acad Sci, Beijing 100049, Peoples R China
  • [ 7 ] [Wu, Xiaolin]China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
  • [ 8 ] [Lu, Lin]Fujian Geol Explorat Inst Geol & Mine Bur, Fuzhou 350013, Peoples R China

Reprint 's Address:

  • [Liu, Wenyuan]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China;;

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Source :

ORE GEOLOGY REVIEWS

ISSN: 0169-1368

Year: 2024

Volume: 170

3 . 2 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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