山东栖霞地区与金矿有关的煌斑岩地球化学特征及成因探讨

详细信息

收稿日期: 2012-03-12

刊出日期: 2012-04-30

GEOCHEMISTRY AND PETROGENESIS OF THE LAMPROPHYRES RELATED TO GOLD DEPOSITS IN QIXIA, SHANDONG PROVINCE

Received Date: 12 March 2012

Publish Date: 30 April 2012

摘要: 山东栖霞地区煌斑岩常与金矿密切共生，本次研究的煌斑岩为一套高碱（高K）低钛的钙碱性闪斜煌斑岩，其富集轻稀土元素和大离子亲石元素，明显亏损重稀土元素以及高场强元素.该煌斑岩来源于俯冲带流体交代作用而形成的富集地幔的部分熔融，岩浆在上升过程中没有受到明显的地壳物质混染，形成于岛弧钙碱性环境下.煌斑岩的形成是多种动力因素综合作用的结果.
- 煌斑岩 /
- 地球化学 /
- 岩石成因 /
- 栖霞地区 /
- 山东省
Abstract: 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 calc-alkalic 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.
- lamprophyre /
- geochemistry /
- petrogenesis /
- Qixia area /
- Shandong Province