大别山东麓前寒武纪二长花岗质片麻岩抬升冷却过程的递进变形

张家声; 江来利; 许建东

大别山东麓前寒武纪二长花岗质片麻岩抬升冷却过程的递进变形

- 1.
  中国地震局地质研究所, 北京, 100029
- 2. 安徽省地质调查院, 合肥, 230001

收稿日期: 2002-04-29

修回日期: 2002-06-03

刊出日期: 2003-01-28

PROGRESSIVE DEFORMATION OF PRECAMBRIAN ADAMELLITIC GNEISSES RESPONSE TO AN UPLIFT-RELATED COLLING IN EASTERN DABIE MOUNTAINS, CENTRAL CHINA

- 1.
  Institute of Geology, China Seismological Bureau, Beijing 100029
- 2. Geological Survey of Anhui Province, Hefei 230001

Received Date: 29 April 2002

Revised Date: 03 June 2002

Publish Date: 28 January 2003

摘要

摘要: 大别山东麓北段结晶基底中的二长花岗质岩石具长石应力支撑结构,早期高级变质作用条件下的韧性推覆以长石类矿物普遍晶质塑性变形和同构造重结晶作用为典型特征,晚期在发育糜棱岩的低级韧性剪切变形阶段处于脆性状态,在其内部和边缘形成了包括微角砾岩、假玄武玻璃、黑色超糜棱岩和熔结超碎裂岩等脆性断层岩石.二长花岗质岩石中不同类型韧性和脆性断层岩石的成因和构造联系,记录了大别地体的抬升冷却历史和不同阶段构造变动的性质.
- 递进变形 /
- 抬升冷却 /
- 糜棱片麻岩和糜棱岩 /
- 微角砾岩 /
- 大别山东麓
Abstract: The adamellitic gneisses in the basement in northern segment of eastern Dabie Mountains were characterized by feldspars stress-suppporting framework in response with deformation. All feldspars in the rocks involved into an earlier high-grade ductile thrusting were sheared by crystal plasticity mechanism. The adamellitic gneisses were in brittle state during a late low-grade ductile shearing when various brittle fault rocks, including micro breccia, pseudotachylyte, black ultramylonite and sintered cataclasite, were formed within or on the rim of the adamellitic gneisses. Origin of the various ductile to brittle deformation rocks and their structural relationships recorded an uplift-related cooling history of the Dabie terrain and the deformation process in different stages.
- Progressive deformation /
- Uplift-related cooling /
- Mylonitic gneiss and mylonites /
- Microbreccia /
- Eastern Dabie Mountains

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大别山东麓前寒武纪二长花岗质片麻岩抬升冷却过程的递进变形

PROGRESSIVE DEFORMATION OF PRECAMBRIAN ADAMELLITIC GNEISSES RESPONSE TO AN UPLIFT-RELATED COLLING IN EASTERN DABIE MOUNTAINS, CENTRAL CHINA

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