地质论评Issue(3)：651-663,13.DOI:10.16509/j.georeview.2015.03.018
西乌珠穆沁旗巴彦呼舒花岗闪长岩锆石 U-Pb LA-ICP-MS 年龄、地球化学、Hf 同位素特征及其地质意义
Zircon U-Pb LA-ICP-MS Dating,Geochemical,Hf Isotopic Characteristics of Bayanhushu Granodiorite in West Ujimqin Banner and Geological Significance
摘要
Abstract
The granodiorite of the article reports located in 10km east of Bayanhushu Inner Mongolia.The tectonic position belongs to Late Paleozoic fold belt of Xilinhaote of the middle in central Asian orogenic.The age of this pluton is 236.1 3.4Ma by using LA-ICP-MS U-Pb zircon dating method.In this granodiorite,the content of SiO2 is 66.93% ~67.22%,Al2 O3 is 15.13% ~15.53%,K2 O is 2.47% ~2.56%,Na2 O is 4.35% ~4.46%, and the A /CNK is 0.94 ~0.95,this petrochemistry data indicate that the granodiorite belongs to the Partial aluminum and calc—alkaline series,and depleted in high field strength elements,the content of Sr is (416.6 ~425.7)10 -6 ,Sr/Y is 42 ~49,this geochemical characteristic is the same as high Sr low Y of the adakite or high Sr granite.The εHf(t)values and two staged Hf model age of the granodiorite is 13.3 ~15.7,249 ~356Ma and 258 ~422Ma.Synthetical analyze shows,The granodiorite is the product of the thickening of partial melting of crust after closed by Siberian plate and North China plate.关键词
巴彦呼舒/锆石 U-Pb 定年/Hf 同位素特征/花岗闪长岩/西伯利亚板块/华北板块Key words
Bayanhushu/zircon U-Pb dating/Hf isotope/granodiorite/Siberian plate/North China plate引用本文复制引用
熊光强,刘敏,赵洪涛,张达,王浩然,王忠,胡兆初..西乌珠穆沁旗巴彦呼舒花岗闪长岩锆石 U-Pb LA-ICP-MS 年龄、地球化学、Hf 同位素特征及其地质意义[J].地质论评,2015,(3):651-663,13.基金项目
本文为中国地质地质调查局项目中蒙边境东段深部结构及成矿条件对比研究（编号1212011085490），中国地质地质调查局项目内蒙古1∶5万巴拉格尔农业分场幅、阿拉腾格勒公社幅、猴头庙幅、阿拉腾敖包大队幅区域地质调查（编号1212011120700）。 （）
