喇嘛苏铜矿中酸性岩体岩石学特征
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摘要
采用费氏台五轴定位法和D C Noble等提出的求斜长石成分和有序度方法、鉴定图表,在喇嘛苏矿区三种中酸性岩体的岩石薄片中选择比较新鲜的、自形程度较好的斜长石,测得斜长石牌号χ(An)=24～56,有序度S=0.4～0.7,说明斜长石以中长石为主,属中温型,即在结晶过程中岩浆冷却的速度较快;斜长石环带有正常环带,也有韵律环带,表明在结晶过程中总体是正常结晶环境,而期间有上下反复运动和岩浆房内压力的反复变化。
Fishercher stokes five axis positioning method,plagioclase identification plot,the method for calculation of composition and order of plagioclase put forward by D.C.Noble to identify plagioclase in three kinds of acid-intermediate intrusive bodies in Lamasu copper deposit.Samples are relatively fresh with highly euhedral crystal of plagioclase in thin section.The identification is that An%of its plagioclase mostly is between 24 to 56 and degree of order S=0.4 to 0.7 that means the domination of andesine formed under condition of medium temperature,i.e.magma is cooled quickly during crystallization of the plagioclase.Normal and rhythmic girdle in the plagioclase shows that it is crystallized under normal condition with crystal ocillation during its crystallization process,the crystallographic environment generally is normal,and there has up and down movement and the pressure change in Magma chamber again and again occasionally.
Fishercher stokes five axis positioning method,plagioclase identification plot,the method for calculation of composition and order of plagioclase put forward by D.C.Noble to identify plagioclase in three kinds of acid-intermediate intrusive bodies in Lamasu copper deposit.Samples are relatively fresh with highly euhedral crystal of plagioclase in thin section.The identification is that An%of its plagioclase mostly is between 24 to 56 and degree of order S=0.4 to 0.7 that means the domination of andesine formed under condition of medium temperature,i.e.magma is cooled quickly during crystallization of the plagioclase.Normal and rhythmic girdle in the plagioclase shows that it is crystallized under normal condition with crystal ocillation during its crystallization process,the crystallographic environment generally is normal,and there has up and down movement and the pressure change in Magma chamber again and again occasionally.
引文
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[2]王京彬,徐新.新疆北部后碰撞构造演化与成矿[J].地质学报,2006,80(1):23-31.
[3]Chen Yan-Jing,Chen Hua-Yong,Khin Zaw,et al.Geodynamic settings and tectonic model of skarn gold deposit in china:An overview[J].Ore Geology Reviews,2007,31:139-169.
[4]Yang F Q,Mao J W,Bierlein F P.A review of the geological characteristics and geodynamic mechanisms of Late Paleozoic epithermal gold deposits in North Xinjiang,China[J].Ore Geology Reviews,2009,35:217-234.
[5]李永军,庞振甲,栾新东,等.西天山特克斯达坂花岗岩基的解体及钼找矿意义[J].大地构造与成矿学,2007,31(4):435-440.
[6]Zhang Z H,Wang Z L,Wang L S.Metallogenic epoch and ore-forming environment of the Lamasu skarn-porphyritic CuZn deposit,western Tianshan,Xinjiang,NW China[J].Acta Geological Sinica,2008,82(4):731-740.
[7]唐功建,王强,赵振华.西天山喇嘛苏成矿斑岩年代学、地球化学特征与成因初探[J].矿物岩石地球化学通报,2008,27(Z1):269-271.
[8]张东阳,张招崇,薛春纪,等.西天山喇嘛苏铜矿成矿斑岩的岩石学及成因探讨[J].岩石学报,2010,26(3):680-694.
[9]解洪晶,武广,朱明田,等.西天山喇嘛苏岩体年代学、地球化学及成矿意义[J].地学前缘(中国地质大学(北京),北京大学),2013,20(1):190-205.
[10]肖序常,汤耀庆,冯益民,等.新疆北部及其邻区大地构造[M].北京:地质出版社,1992:1-169.
[11]姜常义,穆艳梅,白开寅,等.南天山花岗岩类的年代学、岩石学、地球化学及其构造环境[J].岩石学报,1999,15(2):298-308.
[12]张增杰,陈衍景,陈华勇,等.天山海西期不同类型花岗岩类岩石化学特征及其地球动力学意义[J].矿物岩石,2003,23(1):15-24.
[13]李锦轶,何国琦,徐新,等.新疆北部及邻区地壳构造格架及其形成过程的初步探讨[J].地质学报,2006,80(1):148-168.
[14]Wang B,Shu L S,Cluzel D.Geochemical constraints on Carboniferous volcanic rocks of the Yili Block(Xinjiang NW China):Implication for the tectonic evolution of Western Tianshan[J].Journal of Asia Earth Sciences,2007,29:148-159.
[15]Wang Bo,Dominique Cluzel,Shu Liangshu,et al.Evolution of calc-alkaline to alkaline magmatism through Carboniferous convergence to Permian transcurrent tectonics,western Chinese Tianshan[J].International Journal of Eath Sciences,2009,98:1275-1298.
[16]Xiao W J,Han C M,Yuan C.Middle Cambrian to Permian subduction-related accretionary orogenesis Northern Xinjiang NW China:Implications for the tectonic evolution of central Asia[J].Journal of Asia Earth Sciences,2008,32:102-117.
[17]Xiao Wenjiao,Huang Baochun,Han Chunming,et al.A review of the western part of the Altaids:A key to understanding the architecture of accretionary orogens[J].Gondwana Research,2010,18:253-273.
[18]Jong K,Wang B,Faure M.New40 Ar/39 Ar age constraints on the late Palaeozonic tectonic evolution of the western Tianshan(Xinjiang Northwestern China),with emphasis on Permian fluid ingress[J].International Journal of Eath sciences,2009,98:1239-1258.
[19]夏换,陈根文,刘群,等.西天山吐拉苏盆地大哈拉军山组火山岩地球化学特征及构造意义[J].大地构造与成矿学,2011,35(3):429-438.
[20]李宁波,单强,张永平,等.西天山阿吾拉勒地区A型流纹斑岩的初步研究[J].大地构造与成矿学,2012,36(4):624-633.
[21]车自成,刘良,刘洪福,等.论伊犁古裂谷[J].岩石学报,1996,12(3):478-489.
[22]Sun L H,wang Y J.Fan W M.Post-collisional potassic magmalism in the Southern Awulale Mountain,western Tianshan Orogen,petrogenetic and tectonic implications[J].Gondwana Rearch,2008,14:383-394.
[23]顾连兴,胡受奚,于春水,等.东天山博格达造山带石炭纪火山岩及其形成地质环境[J].岩石学报,2000,16(3):305-316.
[24]Xiao L Q,Xu X Y,Xia Z C.Petrogenesis of Carboniferous rift-related volcanic rocks in the Tianshan,northwestern,China[J].Geological Society of America Bulletin,2004,116:419-433.
[25]夏林圻,夏祖春,徐学义,等.天山及邻区石炭纪-早二叠世裂谷火山岩岩石成因[J].西北地质,2008,41(4):1-68.
[26]毛政利.喇嘛苏铜矿区中酸性岩体微量元素特征及其成因分析[J].金属矿山,2014(2):108-111.
[27]常丽华.费德洛夫法简明教程[M].北京:地质出版社,1993:36-58.
[28]V.马莫著.袁廷佐,吴庆荣译.花岗岩岩石学与花岗岩问题[M].北京:地质出版社,1979:163-237.
[29]林景仟.岩浆岩成因导论[M].北京:地质出版社,1987:142-186.
[30]邱家骧.应用岩浆岩岩石学[M].武汉:中国地质大学出版社,1991:220-256.
[31]赖健清,彭省临,王核,等.喇嘛苏铜矿区铅同位素的特征及其意义---铅同位素年龄计算的一种新思路[J].中南工业大学学报(自然科学版),1999,30(4):364-367.
[32]邵拥军,彭省临,赖健清.新疆喇嘛苏铜矿床的同位素地球化学特征[C]∥戴塔根.湖南矿物岩石地球化学论丛(1999).长沙:中南大学出版社,1999:163-167.