鲁西新泰地区孟家屯岩组岩石学、地球化学及原岩特征

基金项目: 地质矿产部跨世纪人才基金项目和同位素开放实验室基金项目联合资助.

Petrology, geochemistry and protoliths of the Mengjiatun Formation complex in the Xintai area, western Shandong, China

摘要: 孟家屯岩组为鲁西新太古代早期形成的一套表壳岩,代表性的岩石类型为石榴石英岩、黑云母石英片岩、斜长角闪岩等.对这些岩石的岩相学、稀土元素、微量元素地球化学的研究和斜长角闪岩Nd同位素的初步分析,表明孟家屯岩组的原岩建造为一套砂岩、富泥质砂岩和岛弧拉斑玄武岩组合.这一认识对探讨鲁西早前寒武纪地壳的形成和演化特征具有重要意义.
- 孟家屯岩组 /
- 岩相学 /
- 地球化学 /
- 原岩 /
- 鲁西
Abstract: The Mengjiatun Formation complex is a suite of supracrustal rocks formed in the early Neoarchean, and its typical rocks include garnet quartzite, biotite-quartz schist and amphibolite. Petrographic and REE and trace element geochemical studies of these rocks and Nd isotope analysis of amphibolite indicate that the protoliths of the Mengjiatun Formation complex are sandstone, mud-rich sandstone and island arc tholeiite. This view has great significance for the study of the formation and evolution of the early Precambrian crust in western Shandong.
- Mengjiatun Formation complex /
- lithofacies /
- geochemistry /
- protolith /
- western Shandong