摘要
哈尔里克山南坡塔水河一带花岗质岩体的锆石SHRIMPU-Pb定年结果显示:钾长花岗岩中的锆石8个测点的206Pb/238U加权平均年龄为(462±9)Ma;花岗闪长岩中的锆石8个测点的206Pb/238U加权平均年龄为(447±11)Ma;石英闪长岩中的锆石8个测点的206Pb/238U加权平均年龄为(448±7)Ma。这些年龄值是在哈尔里克古生代复合岛弧带首次获得的中—晚奥陶世中酸性侵入岩的时代,为探讨该古生代复合岛弧带的构造发展历史提供了新的资料。
SHRIMP dating of zircons from granitic bodies in the Tashuihe area on the southern slope of the Karlik Mountains shows that 8 spots of zircons from moyite, 8 spots of zircons from granodiorite and 8 spots of zircons from quartz diorite give weighted mean ^206Pb/^238U ages of 462±9, 447±±11 and 448±7 Ma respectively. These ages are ages of Mid-Late Ordovician intermediate-acid intrusive rocks obtained for the first time from the Paleozoic Karlik composite island arc zone, which furnish new data for the study of the tectonic history of this Paleozoic composite island arc zone.
出处
《地质通报》
CAS
CSCD
北大核心
2006年第8期923-927,共5页
Geological Bulletin of China
基金
新疆维吾尔自治区项目<1:5万琼库尔幅
代普台日幅
塔水河幅3幅联测>(编号:XJQD2003-08)部分成果。
