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| 新疆拜城县波孜果尔A型花岗岩类矿物学特征及岩浆形成的温度条件 | |
| 引用本文： | 刘春花,尹京武,吴才来,蔡佳,邵兴坤,杨海涛,郜源红,雷敏,徐海明,王军.新疆拜城县波孜果尔A型花岗岩类矿物学特征及岩浆形成的温度条件[J].岩石矿物学杂志,2012,31(4):589-602. |
| 作者姓名： | 刘春花 尹京武 吴才来 蔡佳 邵兴坤 杨海涛 郜源红 雷敏 徐海明 王军 |
| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037 2. 中国地质大学,北京,100083 3. 中国地质科学院矿产资源研究所,北京,100037 |
| 基金项目： | 国家专项(SinoProbe-05-05);自然科学基金项目(40921001,49772106,40472034,40672049);中国地调局项目(1212010918007,1212010818090,1212010611803,1212010711816,1212011120160) |
| 摘 要： | 新疆拜城县波孜果尔A型花岗岩类为富含铌、钽、锆等有用元素的含矿岩体。通过偏光显微镜、电子探针(EPMA)化学成分分析、电子探针背散射(BSE)对波孜果尔A型花岗岩类的矿物学特征进行了研究,并对岩浆形成的温度条件与构造背景进行了讨论。结果表明,波孜果尔A型花岗岩类包括霓石钠闪石英碱性长石正长岩、霓石钠闪碱性长石花岗岩、黑云母碱性长石正长岩3种岩石类型。主要造岩矿物包括石英、钠长石、钾长石、霓石、钠铁闪石和铁叶云母。副矿物包括锆石、烧绿石、钍石、萤石、独居石、氟碳铈镧矿、磷钇矿等。岩浆平均温度832~839℃,形成于非造山的板内构造环境,且具高温、无水、低氧逸度的成岩特点。 |
| 关 键 词： | 碱性岩 A型花岗岩类 矿物学 波孜果尔 |
| 收稿时间： | 2011/12/18 0:00:00 |
| 修稿时间： | 2012/5/17 0:00:00 |
Mineralogy and temperature of magma generation for A-type granitoids in Boziguoer, Baicheng County, Xinjiang |
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| LIU Chun-hu,YIN Jing-wu,WU Cai-lai,CAI Ji,SHAO Xing-kun,YANG Hai-tao,GAO Yuan-hong,LEI Min,XU Hai-ming and WANG Jun.Mineralogy and temperature of magma generation for A-type granitoids in Boziguoer, Baicheng County, Xinjiang[J].Acta Petrologica Et Mineralogica,2012,31(4):589-602. | |
| Authors: | LIU Chun-hu YIN Jing-wu WU Cai-lai CAI Ji SHAO Xing-kun YANG Hai-tao GAO Yuan-hong LEI Min XU Hai-ming and WANG Jun |
| Institution: | 1.Institute of Geology,CAGS,Beijing 100037,China;2.China University of Geosciences,Beijing 100083,China;3.Institute of Mineral Resources,CAGS,Beijing 100037,China) |
| Abstract: | The Boziguoer A-type granitoids in Baicheng County of Xinjiang are ore-bearing rocks with abundant useful elements such as Nb,Ta and Zr.The petrological and mineralogical characteristics of the A-type granitoids were investigated on the basis of observation under polarized microscope,chemical analysis and detailed BSE images using EPMA,followed by the discussion on the p-T conditions of A-type magma generation and the tectonic setting.The results indicate that these A-type granitoids could be divided into three types,namely aegirine arfvedsonite quartz alkali feldspar syenite,aegirine arfvedsonite alkali feldspar granite and biotite alkali feldspar syenite.The major rock-forming minerals are quartz,albite,K-feldspar,aegirine,arfvedsonite and siderophyllite,whereas the accessory minerals include mainly zircon,pyrochlore,thorite,fluorite,monazite,bastnaesite and xenotime.The average temperatures of the magma are 832～839℃.A-type granitoids might have been formed in an anorogenic intraplate tectonic setting by which they generally show such features as hightemperature,anhydrous nature and low fugacity. |
| Keywords: | alkaline rocks A-type granitoids mineralogy Boziguoer |
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