大别—苏鲁区残余超高压构造及其动力学意义

索书田; 钟增球; 游振东; 周汉文

Volume 25 Issue 6

Jun. 2000

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Article Navigation > Earth Science > 2000 > 25(6): 557-563

Suo Shutian, Zhong Zengqiu, You Zhendong, Zhou Hanwen, 2000. RELIC UHP STRUCTURES IN DABIE-SULU REGION, CHINA: STRUCTURAL EXPRESSION AND GEODYNAMIC SIGNIFICANCE. Earth Science, 25(6): 557-563.

Citation:

Suo Shutian, Zhong Zengqiu, You Zhendong, Zhou Hanwen, 2000. RELIC UHP STRUCTURES IN DABIE-SULU REGION, CHINA: STRUCTURAL EXPRESSION AND GEODYNAMIC SIGNIFICANCE. Earth Science, 25(6): 557-563.

Suo Shutian, Zhong Zengqiu, You Zhendong, Zhou Hanwen, 2000. RELIC UHP STRUCTURES IN DABIE-SULU REGION, CHINA: STRUCTURAL EXPRESSION AND GEODYNAMIC SIGNIFICANCE. Earth Science, 25(6): 557-563.

Citation:

Suo Shutian, Zhong Zengqiu, You Zhendong, Zhou Hanwen, 2000. RELIC UHP STRUCTURES IN DABIE-SULU REGION, CHINA: STRUCTURAL EXPRESSION AND GEODYNAMIC SIGNIFICANCE. Earth Science, 25(6): 557-563.

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RELIC UHP STRUCTURES IN DABIE-SULU REGION, CHINA: STRUCTURAL EXPRESSION AND GEODYNAMIC SIGNIFICANCE

1.
Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China
2.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 2000-06-29
Publish Date: 2000-11-25

Abstract

Abstract

Structural and petrological research combined with the geological analysis of the isotopic dating references available now is used in this paper to demonstrate that the present day observed tectonic framework of the ultrahigh pressure (UHP) metamorphic belt in the Dabie Sulu region was formed dominantly in an extensional process at 200-170 Ma, on amphibolite facies conditions, following the Triassic collision between the Sino Korean and Yangtze cratons. The relic syn collision and UHP structures are preserved in the relatively large eclogite and other UHP metamorphic rock masses. Examples of the eclogite drawn from the Chengmagang and Hejiawan in Hubei Province, the Bixiling in Anhui Province, and Donghai in Jiangsu Province, are used to analyze and describe such relic UHP structures as the massive eclogite with weak foliations, the UHP shear zones and A type folds. It is stressed in the paper that only early UHP relic structural records may reflect the tectonic environment in the continental collision stage, and the corresponding relative dynamic features. On this basis, a kinematic model is proposed to represent the dynamic framework of the northward subduction of the Triassic (240-210 Ma) Yangtze craton under the Sino Korean craton and of their corresponding oblique collision.
- relic UHP structure,
- extensional process,
- compressive regime,
- stretching lineation,
- Dabie Sulu region

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References(38)

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