Geochemistry and Petrogenesis of the Lamprophyres Related to Gold Deposits in Qixia, Shandong Province

详细信息   

• 责任者：Geng Rui (School of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; un Fengyue
• 刊名：Geology and Resources
• 出版年：2012
• 卷期：21(2)
• 关键词：煌斑岩 ; lamprophyres ; 山东 ; Shandong Province
• 页码：p.229-233
• 图表：2 illus., 8 tables, 1 refs.
• 分类号：0801
• issnNo：ISSN1671-1947
• isbnNo：CN21-1458/P

摘要

The lamprophyres in Qixia area, Shandong Province are always closely associated with gold mineralization. The lamprophyres in the studied area are mainly calc-alkalic spessartite, characterized by high alkali （K） and low Ti, with enrichment of LILEs and LREEs, and depletion of HFSEs and HREEs. Study shows that the lamprophyre should be originated from the partial melting of enriched mantle, which was formed by the metasomatism of fluid in the subduction belt. The magma, formed in island arc ealc-alkalie environment, was not significantly mixed with the crustal material during its rising process. The formation of the lamprophyre is the joint effect of multiple dynamic factors.