皖南休宁县里东坑似斑状花岗闪长岩成岩成矿特征分析

Translated title of the contribution: Rock-forming and ore-forming characteristics of the Lidongkeng porphyritic granodiorite in Xiuning County, south Anhui Province

Zi Wei Chen, Xin Qi Yu*, Xiang Zhou, Guo Sheng Hao, Jun Ting Qiu, Peng Ju Li

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The Lidongkeng molybdenum deposit is located in Xiuning County, south Anhui Province. Accompanied by detailed geological description, this paper presents new ages and bulk-rock geochemistry for the Lidongkeng deposit. The LA-MC-ICP-MS zircon U-Pb age of 153.01 ± 0.90 Ma (MSWD = 1.14) for the ore-bearing porphyritic granodiorite and the Re-Os model age of 144.9 ±1.9 Ma (MSWD =2.0) for the molybdenite suggest that both of the ore body and the porphyry occurred during the Early Yanshanian period. According to the analyses of elements, the rock is rich in Si and K but poor in Mg, Ca and P and is characterized by high Rb and low Yb +Ta values, suggesting a collision environment. The porphyry is geochemically characterized by slight negative Eu anomaly. The porphyry shows I -type granite affinity. The molybdenite samples have Re content from 24.17 to 27.92 μ g.g-1 which implies that the molybdenum in the Lidongkeng deposit might have been derived from the crust with partial mixture of mantle materials.

Original languageChinese
Pages (from-to)1762-1776
Number of pages15
JournalGeology in China
Volume40
Issue number6
Publication statusPublished - 2013
Externally publishedYes

    Fingerprint

Keywords

  • I-type granite
  • Lidongkeng Mo deposit
  • Mixture of the crust and the mantle
  • Re-Os dating
  • Zircon u-Pb dating

Cite this

Chen, Z. W., Yu, X. Q., Zhou, X., Hao, G. S., Qiu, J. T., & Li, P. J. (2013). 皖南休宁县里东坑似斑状花岗闪长岩成岩成矿特征分析. Geology in China, 40(6), 1762-1776.