新疆石油地质

新疆石油地质 ›› 1994, Vol. 15 ›› Issue (4): 289-297.

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准噶尔盆地早古生代陆壳存在的证据

彭希龄   

  1. 教授级高工 石油地质 新疆石油管理局勘探开发研究院 克拉玛依 834000
  • 收稿日期:1994-03-17 发布日期:2020-08-27

EVIDENCE FOR THE PRESENCE OF EARLY PALEOZOIC CONTINENTAL CRUST IN JUNGGAR BASIN

Peng Xiling   

  1. Professor of Fmgineering. Petrcleum Geclogy. Research Instute of Exploration &. Derelopment. Xin jiang Petroleum Administration Bureau. Karamay 834000
  • Received:1994-03-17 Published:2020-08-27

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摘要： 根据：准噶尔盆地分布最广的上古生界火山碎屑岩系的岩石地球化学成分都证明其形成于大陆边缘的火山岛弧区：准噶尔北部的奥陶系为陆棚台地相碳酸盐岩，志留系中也发现类似的灰岩巨型滑塌体，表明海盆的基底为稳定陆块；东准噶尔发现了19亿年的古老混合岩：晚古生代至中新生代盆地一直处于陆盆发育阶段，因而得出结论，准噶尔地区早古生代为大陆地壳而非大洋地壳。

关键词: 准噶尔盆地, 早古生代, 陆壳

Abstract: It is concluded that Junggar area is a continental ctust rather than an oceanic crust during Early Paleozoic. based on the following evidences: geochemical components of the most widely-distributed Upper Paleozoic volcaniclastic in Junggar basin formed in the volcanic island arc area of continental margin: the Ordovician in the northern Junggar area is Composed of continental shelf platform carbonate. and similar limestone decollement was discovered in the Silurian. indicating that the basement of ocean basin is a stable continental block ; composite rocks (1 900ma) were found in the eastern Junggar area; the basin is at the stage of continental basin evolution during the Late aleozoic to middle Cenozoic.

Key words: Junggar basin, Early Paleozoic, Continental crust