北准噶尔杜热一带晚古生代岩浆岩地球化学、年代学及地质意义  

Geochemistry, Chronology and Geological Significance of Late Paleozoic MagmaticRocks in Dure Area, Northern Junggar, Xinjiang

作　　者：李咸阳 滕宇翔 郑飞 王哲 Li Xianyany;Teng Yuxiang;Zheng Fei;Wang Zhe(Xinjiang Institute of Geological Survey,Urumqi,Xinjiang,830000,China)

机构地区：[1]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000

出　　处：《新疆地质》2024年第1期75-80,共6页Xinjiang Geology

基　　金：中央引导地方科技资专项资助项目(ZYYD2023A12);新疆维吾尔自治区自然科学基金资助项目(2022D01A288)联合资助。

摘　　要：北准噶尔杜热地区大面积被第四系覆盖,出露少量基性岩体,通过岩石化学、地球化学、同位素年代学,探讨杜热一带新发现辉长岩、闪长岩复合岩体成矿意义,分析该区找矿潜力。辉长岩微量元素显示富集Rb,K,La,Sr,Ti,亏损Th,Ta,Zr,Hf;闪长岩显示富集Rb,K,La,Sr,亏损Nb,Ta,辉长岩、闪长岩稀土元素显示岛弧火山岩特征。测试获得辉长岩和闪长岩形成年龄分别为(383.9±3.3)Ma和(386.2±3.8)Ma。there are a few basic rocks in the Quaternary overlying area of the dure area,northern Junggar.In this paper,a new composite rock body of gabbro and diorite has been discovered in the dure area,based on petrochemistry,geochemistry and isotopic chronology,its significance for mineralization and prospecting potential are discussed.The gabbro micronutrient show enrichment of Rb,K,La,Sr,TI and deficiency of Th,Ta,Zr,HF,while the diorite shows enrichment of Rb,K,La,SR and deficiency of NB,Ta,the rare earth elements of gabbro and diorite show the characteristics of island arc volcanic rocks.The ages of gabbro and diorite are(383.9±3.3)Ma and(386.2±3.8)Ma,respectively.

关 键 词：北准噶尔 锆石U-PB测年 杜热 

分 类 号：P588.1[天文地球—岩石学] P59[天文地球—地质学]