Tectonic Coupling and Segmentation of Marginal Structural Belt in Junggar Basin

Abstract

Abstract: Researches indicate that the marginal structural belt of Junggar basin undergone the phases of strong coupling of Hercynian, weak coupling and adjustment from Mesozoic to early Cenozoic as well as strong coupling of southern margin of Junggar basin since Neogene. The degree of activity of marginal structural belt of Junggar basin assumes obvious decline since Hercynian, weak adjustment in Mesozoic and reascending in Cenozoic with less level than in Hercynian. Such orogenic events allowed the hexagon marginal belt with distinct structural configurations of Junggar basin to be divided into 6 marginal structural segments such as west segment (free restricted thrust nappe)and east segment (strong restricted thrust nappe)of southern margin of the basin, western margin segment (EW compressiondeformation belt)of Zhundong (east Junggar)uplift, northeast segment or Ulungu segment (kink fault terrace and basement sags), northwestern margin segment or Zhayir segment (thrust-nappe superimposed system)and west Junggar marginal segment (kink belt structure).

Key words: Junggar basin, tectonic coupling, structural segmentation

CLC Number:

TE111.2

MA Zong-jin, QU Guo-sheng, LI Tao, ZHAO Rui-bin, XU Jian-dong. Tectonic Coupling and Segmentation of Marginal Structural Belt in Junggar Basin[J]. Xinjiang Petroleum Geology, 2008, 29(3): 271-277.

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