东昆仑雪山峰地区构造混杂岩带岩浆岩地球化学、年代学特征及地质意义

Geochemistry, Chronological Characteristics and Geological Significance of Magmatic Rocks in Tectonic Melange Belts in the Xueshanfeng Area, East Kunlun

为揭示雪山峰地区构造混杂岩带构造演化及岩浆岩成矿作用特征,对雪山峰地区构造混杂岩带中岩浆岩进行了锆石U-Pb定年及地球化学研究。根据结果显示,并结合区域资料,推测混杂岩形成时代为奥陶纪-志留纪。全岩地球化学数据显示其侵入岩属基性岩类,火山岩属中性岩类,原岩形成于不同的大地构造环境,该套地层中蚀变辉长岩和蚀变角闪岩中成矿可能性较大。

In order to reveal the tectonic evolution and magmatic rock mineralization characteristics of the tectonic melange belt in the Xueshanfeng area, zircon U-Pb dating and geochemical studies were carried out on the magmatic rocks in the tectonic melange belt of the Xueshanfeng area. According to the results, combined with regional data, it is speculated that the age of melange formation is Ordovician-Silu. The geochemical data of the whole rock shows that the intrusive rocks are basic rocks, and the volcanic rocks are of neutral rocks, and the original rocks are formed in different tectonic environments. It is more likely to be mineralized in the altered gabbro and altered amphibolites in the formation.