| 甘晓春.闽北麻源群变质岩的流体包裹体研究：岩石抬升过程的p－T－t[J].地质找矿论丛,1995,(1):38-47 |
| 闽北麻源群变质岩的流体包裹体研究：岩石抬升过程的p－T－t |
| A STUDY OF FLUID INCLUSIONS ON METAMORPHIC ROCKS OF MAYUAN GROUP, NORTHERN FUJIAN PROVINCE:UPLIFT p－T－t PATHS |
| 投稿时间：1994-11-01 |
| DOI：10.6053/j.issn.1001-1412.1995.1. 005 |
| 中文关键词: 流体包裹体 p－T－t轨迹 麻源群 福建 |
| 英文关键词: |
| 基金项目: |
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| 摘要点击次数: 1266 |
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| 中文摘要: |
| 根据闽北麻源群变质岩流体包裹体的世代关系和显微测温研究,获得了麻源群变质峰期之后抬升过程p-T-t轨迹,推测岩石遭受剪切变形事件的温压条件为p=85～100MPa,T=265～285℃。本区流体演化早期以CO2为主,晚期以水溶液为主。 |
| 英文摘要: |
| Fluid inclusions are studied in quartz veins and migmatitic veins in Mayuan Group, Northern Fujian province.Three types of fluid inclusions, CO2, CO2-H2O and aqueous inclusion are identified.Petrographic studies of fluid inclusions show that they are of different generations.Based on the isochores of fluid inclusion according to the microthermometries and their time sequence of entrapment, the uplift pT-t paths of Manshan Formation after peak metamorphism and Dajinshan Formation after migmatization have been inferred.They display a clockwise direction and convex toward the temperature axis.The P-T condition at which the shear deformation of quartz veins occurred is P=85-100MPa, T=265-285℃.The fluid composition evolved from CO2-rich fluid in the early period to aqueous fluid later.CO2 is derived from host rocks. |
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