| 甘肃北山榴辉岩矿物特征及温压条件 |
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| 引用本文： | 于海峰,梅华林,陆松年,李铨.甘肃北山榴辉岩矿物特征及温压条件[J].吉林大学学报(地球科学版),1999,29(2):110-115. |
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| 作者姓名： | 于海峰 梅华林 陆松年 李铨 |
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| 作者单位： | 中国地质科学院天津地质矿产研究所,天津,300170 |
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| 基金项目： | 国土资源部资源与环境科技攻关项目;950201102; |
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| 摘 要： | 甘肃北山榴辉岩中矿物组合形成于四个不同阶段：（１）以柯石英为代表的早期超高压阶段，（２）以绿辉石＋石榴石平衡共生组合为代表的主期高压阶段，（３）以单斜辉石＋角门石＋斜长石交生组合为代表的晚期较高压退变阶段，（４）以绿泥石＋绿帘石＋科长石为代表的后期叠加阶段。前三个阶段反映了相辉岩相变质作用的主要过程。后一阶段，反映了榴辉岩在地壳浅部层次绿片岩相环境下遭受轻微的叠加改造。
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| 关 键 词： | 榴辉岩 矿物特征 温压条件 甘肃北山 |
| 修稿时间： | 1998-06-23 |
MINERAL CHARACTERISTICS AND TEMPERATURE-PRESSURE CONDITIONS OF BEISHAN ECLOGITE,GANSU PROVINCE |
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| Yu Haifeng,Mei Hualin,Lu Songnian,Li Quan.MINERAL CHARACTERISTICS AND TEMPERATURE-PRESSURE CONDITIONS OF BEISHAN ECLOGITE,GANSU PROVINCE[J].Journal of Jilin Unviersity:Earth Science Edition,1999,29(2):110-115. |
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| Authors: | Yu Haifeng Mei Hualin Lu Songnian Li Quan |
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| Abstract: | The mineral assemblages of the Beishan eclogites, Gansu Province, are formed in fourdifferent stages: (1)the earlier super--high pressure stage represented by the exist of coesite, (2) themain high pressure stage represented by the equilibrium paragenesis of garnet and omphacite, (3)thelater high pressure retrogresive stage represented by the symplectitic assemblage of clinopyroxene +hornblende+plagioclase around the earlier omphacite and garnet, (4)the latest superimposed stage represented by the assemblage of chlorite+episode+plagioclase. The former three stages reflect the majorprocess of eclogite factes metamorphism and the latest stages the light overprinting of greenschist faciesretrometamorphism at the shallow level of crust. |
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| Keywords: | eclogite mineral characteristics temperature--pressure condition Beishan area of Gansu Province |
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