胶东乳山金矿蚀变岩中绢云母40Ar/39Ar年龄及其对金成矿事件的制约

Translated title of the contribution: The 40Ar/39Ar dating age of sericite from altered rocks in the Rushan lode gold deposit, Jiaodong Peninsula and its constraints on the gold mineralization

Fang Fang Hu*, Hong Rui Fan, Jin Hui Yang, Fei Wang, Ming Guo Zhai

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The Rushan gold deposit, which is located in the Jiaodong Peninsula, is Currently the largest lode type gold deposit in china in terms of gold resources in single lode. It is characterized with multi-stage mineralization. In order to study the time of early alteration/ mineralization, the 40Ar/39 Ar dating method is employed to analyze sericite from quartz-sericite-pyrite alteration zone beside the auriferous quartz lodes of the Rushan gold deposit. The result shows that the quartz-sericite-pyrite alteration occurred at ca. 129 Ma, 10 Ma earlier than that of the main gold mineralization. This means that the Rushan gold deposit was formed through multi-stage hydrothermal events. As the age of quartz-sericite-pyrite alteration (129 Ma) is within the age range (120 ± 10 Ma) of a large hydrothermal metallogenic event, it is suggested that the hydrothermal alteration and mineralization of the Rushan gold deposit are still related to that single large metallogenic event. It is proved that the Rushan deposit and other gold deposits in the Jiaodong Peninsula were formed in Mesozoic under the condition of tectonic regime transaction, strong thinning of lithosphere, and large-scale metallogeny. This new data helped us to understand much moor of the gold metallogeny and geodynamic settings in the Jiaodong Peninsula.

Original languageChinese
Pages (from-to)109-114
Number of pages6
JournalBulletin of Mineralogy Petrology and Geochemistry
Volume25
Issue number2
Publication statusPublished - Apr 2006
Externally publishedYes

Keywords

  • Ar/Ar chronology
  • Jiaodong Peninsula
  • Rushan gold deposit
  • Sericite
  • Sericitolite

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