Chronological-Geochemical Characteristics of the Shujiadian Intrusion, Tongling Ore Cluster Field: Its Significance to Metallogenesis
详细信息
- 责任者：Lai Xiaodong (School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Yang Xiaoyong
- 刊名：Acta Geologica Sinica
- 出版年：2012
- 卷期：86(3)
- 关键词：辉石闪长岩 ; pyroxene diorite ; 成矿作用 ; metallogenesis ; 安徽 ; Anhui Province
- 页码：p.470-485
- 图表：10 illus., 3 tables, 117 refs.
- 分类号：1001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Summary name="EnDivSummary">
The LA-ICP-MS zircon U-Pb dating results reveal that the Shujiadian pyroxene dioritic intrusion is (140.5±1.4) Ma. The metallogenetic epoch of the Shujiadian pyroxene diorite is slightly younger than 140.5 Ma. Geochemical characteristics present that SiO2 contents of the Shujiadian pyroxene diorite are c.a.50%, belonging rather basic classification, the trace elements have features of LILE enrichments such as Ba, Sr, Th, Pb and depletions of HFSE, such as Zr, Nb, Hf. Then, the authors proposed that the magma of the Shujiadian pyroxene dioritic intrusion was possibly due to ascend and emplacement of magmatic evolution derived from mantle wedge with partial melting and melt metasomatism caused by subducted oceanic slab.