| 赣中周潭群变质岩中石榴石的演化史及其地质意义 |
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| 引用本文： | 胡恭任.赣中周潭群变质岩中石榴石的演化史及其地质意义[J].矿物岩石,2007,27(2):33-38. |
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| 作者姓名： | 胡恭任 |
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| 作者单位： | 华侨学院环境科学与工程系,福建泉州,362021;南京大学内生金属矿床成矿机制研究国家重点实验室,江苏南京,210093 |
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| 基金项目： | 福建省自然科学基金(D0310017)，南京大学内生金属矿床成矿机制研究国家重点实验室开放基金 |
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| 摘 要： | 周潭群变质岩系中石榴石、十字石和黑云母微区化学成分变化明显,石榴石变斑晶具典型的生长环带,由晶体中心向两侧边缘XMg,XFe值递增,XCa,XMn值递减,反映增温过程,晶体最边缘的化学成分反映变质峰期的温度条件。变质岩系经历了角闪岩相变质作用,划分为3个变质阶段。各阶段石榴石的分布、形态、矿物组合、化学成分及其成因条件存在一定差异。通过成因矿物学的系统研究,确定本区变质岩系石榴石的结晶生长演化史及变晶变形序列。
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| 关 键 词： | 石榴石 微区成分 演化史 成因矿物学 周潭群 |
| 文章编号： | 1001-6872（2007）02-0033-06 |
| 修稿时间： | 2006-10-17 |
THE CHEMICAL COMPOSITION,MINERAL EVOLUTION AND THE SIGNIFICANCE OF GARNET FROM THE ZHOUTAN GROUP IN CENTRAL JIANGXI PROVINCE |
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| HU Gong-ren.THE CHEMICAL COMPOSITION,MINERAL EVOLUTION AND THE SIGNIFICANCE OF GARNET FROM THE ZHOUTAN GROUP IN CENTRAL JIANGXI PROVINCE[J].Journal of Mineralogy and Petrology,2007,27(2):33-38. |
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| Authors: | HU Gong-ren |
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| Institution: | 1. Department of Environmental Science and Engineering Huaqiao University,Quanzhou 362021,China 2. State Key Laboratory for Mineral Deposit Research, Nanjing University ,Nanjing 210093,China |
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| Abstract: | The micro-district composition variation of garnet,staurolite and biotite in Zhoutan Group shows obvious regularity.It displays typical growth zoning which reflects the process of crystallization and growth of garnet.The contact edge compositions of the coexisting Grt,Bi,Pl and St reflect the temperature and pressure at the peak metamorphic stage.High hornblende facies of metamorphic event is recognized in Zhoutan Group and can be divided into three metamorphic stages.The morphology,mineral assemblage,chemical composition and genetic condition of garnet are different among the three stages.On the basis of genetic mineralogy,mineral evolution,deformation and geothermometer-barometer,the crystallization-deformation sequence of garnet is determined. |
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| Keywords: | garnet vevolution histroy micro-district composition genetic mineralogy Zhoutan Group |
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