Geochemistry,Chronology and Geological Significance of Late Paleozoic Magmatic Rocks in Dure Area,Northern Junggar,Xinjiang
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,geo-chemistry and isotopic chronology,its significance for mineralization and prospecting potential are discussed.The gab-bro micronutrient show enrichment of Rb,K,La,Sr,TI and deficiency of Th,Ta,Zr,HF,while the diorite shows enrich-ment 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.
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