Major and Trace Element Characteristics of Apatites in Granitoids from Central Kazakhstan:Implications for Petrogenesis and Mineralization
作者单位：Key Laboratory of Mineral ResourcesInstitute of Geology and GeophysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2012年度（第12届）学术年会》
会议日期：2013年
学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学]
基 金：supported by the CAS Knowledge Innovation Project(Grant number kzcx2-yw-107) the National 305 project of China(Grant number 2006BAB07B08)
关 键 词：apatite Central Kazakhstan granitoid magmatic differentiation metallogenetic processes redox states
摘 要：This paper presents abundances of major and trace elements of apatites in granitic rocks associated with different types of ore deposits in Central Kazakhstan on the basis of electron probe microanalysis and laser ablation inductively coupled plasma mass *** results demonstrate that the concentrations and ratios of elements in apatites from different granitoid rocks show distinct features,and are sensitive to magma evolution,petrogenetic and metallogenetic *** in the rocks associated with Mo-W deposits have high content of F and MnO,low content of Cl,which may be indicative of sedimentary sources,while apatites from a Pb-Zn deposit show relatively high content of Cl and low F content,which possibly suggest a high water content In these apatites,Sr contents decrease,while Mn and Y contents increase with magma *** relationship reflects that these elements in apatites are related with the degree of magmatic *** types of REE patterns in apatites are *** 1 character of highest(La/Yb) in apatites of Aktogai porphyry Cu-Mo deposit,Sayak-I skarn Cu deposit and Akzhal skarn Pb-Zn depposit is likely produced by the crystallization of heavy REE-enriched *** 2 character of upward-convex light REE in apatite of Aktogai porphyries likely results from La-enriched mineral *** 3 feature of Nd depletion in apatites of East Kounrad and Zhanet deposits both from Mo-W deposits primarily inherits the character of *** 4 apatites of Aktogai deposit and Akshatau W-Mo deposit with wide range of REE contents may suggest that apatites crystallize under a wide temperature *** types of apatite with distinct redox states are identified based on Eu *** Aktogai apatite with slight negative Eu anomaly displays the most oxidized state of the magma,and the apatites of other samples at Aktogai,East Kounrad and Akzhal with moderate negative Eu anomaly show moderate oxidizing conditio