Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (6): 1735-1756.doi: 10.13278/j.cnki.jjuese.201506115

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Geochronological Framework of Granitoids in Dayaoshan Metallogenic Belt,Eastern Guangxi Province

Qin Ya1, Zhang Qingwei1, Kang Zhiqiang1, Li Saisai1, Feng Zuohai1, Yang Qijun1, Pang Baocheng1, Bai Ling'an1, Xie Yongbin2, Ye Ming1   

  1. 1. Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541004, Guangxi, China;
    2. Guangxi Zhuang Autonomous Region Geological Environmental Monitoring Station, Chongzuo 532200, Guangxi, China
  • Received:2015-05-13 Published:2015-11-26

Abstract:

The Dayaoshan metallogenetic belt is a gold-polymetallic ore-bearing genetic belt extended in nearly EW, and exists in the Cambrian weakly metamorphic rocks.In this metallogenentic belt, different granitoids are dominated, including granodiorite, granite porphyry, monzonite granite, and granodiorite porphyry. They appear as dikes or pipes in the field, a results of magmatic intrusion. The authors studied the chronology of these granitoids in the plutons of Dawangding, Da'an, Gulong, Dacun, Sheshan, and Siwei by using LA-ICP-MS. In combination with the previous geochronological data, the geochronological framework of the granitoids in Dayaoshan metallogenentic belt is reconstructed. The results show that the granitoids in Dayaoshan metallogenetic belt were mainly formed in Caledonian (444.8±2.5 Ma), Early Yanshanian (Jurassic; 164.2±2.8 Ma), and Late Yanshanian (Late Cretaceous; 96.6±1.1 Ma). The gold and polymetallic mineralization ages are consistent with the ages of these granitoids.

Key words: granitoids, geochronology, LA-ICP-MS dating, Dayaoshan metallogenetic belt

CLC Number: 

  • P588.12

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