新疆石油地质 ›› 2011, Vol. 32 ›› Issue (1): 7-10.

• 油气勘探 • 上一篇    下一篇

准噶尔盆地西北缘中拐凸起—五、八区火山岩岩相特征

张顺存1, 姚卫江2, 邢成智2, 贾春明2, 史基安1, 李兵1   

  1. 1.中国科学院油气资源研究重点实验室,兰州730000;
    2.中国石油新疆油田分公司勘探开发研究院地球物理研究所,乌鲁木齐830014
  • 收稿日期:2010-07-07 发布日期:2020-08-07
  • 作者简介:张顺存(1973-),男,甘肃定西人,博士,地球化学,(Tel)0931-4960898(E-mail)zhangshuncun@126.com.
  • 基金资助:
    国家科技重大专项(2008ZX05008-003-04)

Lithofacies of Volcanic Rocks from Zhongguai Swell to District-5 and District-8 in Northwestern Margin of Junggar Basin

ZHANG Shun-cun1, YAO Wei-jiang2, XING Chen-zhi2, JIA Chun-ming2, SHI Ji-an1, LI Bing1   

  1. 1. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
    2. Institute of Geophysics, Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Urumqi, Xinjiang 830014, China
  • Received:2010-07-07 Published:2020-08-07

摘要: 通过岩心观察、薄片鉴定、测井和录井等资料分析,结合地震资料解释,对准噶尔盆地西北缘中拐凸起—五、八区石炭系、二叠系的火山岩岩相进行了研究,在单井相分析、剖面相分析的基础上,作出了研究区石炭系和二叠系佳木河组下亚组的岩相分布平面图:石炭系主要是火山岩,在东北部、中部和西南角为安山岩,东部广大区域和南部为凝灰岩,西南部为火山–沉积岩,西北部为安山岩、凝灰岩、火山–沉积岩等多种岩性,火山角砾岩和玄武岩零星分布于西部偏北部位。二叠系佳木河组下亚组分为2段,从下到上,岩性与石炭系虽然有一定的继承性,但其上段岩相表现为火山–沉积岩增多而凝灰岩减少、安山岩增多而玄武岩减少,可能是火山活动趋于减弱和停止的缘故。

关键词: 准噶尔盆地, 西北缘, 中拐凸起, 石炭系, 二叠系, 火山岩

Abstract: The core observation, slices appraisal, well-logging and logging data analysis are conducted for study of volcanic lithologies of Carboniferous and Permian from Zhongguai swell to District-5 and District-8 in northwestern margin of Junggar basin, combining with seismic data interpretation. On the basis of single well facies and section facies analyses, the plane distribution map of lithofacies of Carboniferous and sub-group of Jiamuhe formation of Permian is plotted. The Carboniferous in this area is dominated by volcanic rocks, with some andesites in the northeast, central and southwest; tuff in vast east area and the south, volcanic-sedimentary rocks in the southwest, these multi-rocks in the northwest, and volcanic breccia and basalt scattered near the west. The sub-group of Jiamuhe is also divided into two sections, from bottom to top, the rocks has some continuity with Carboniferous, but the lithofacies of upper section shows increase of andesite and volcanic-sedimentary rocks, and decrease of basalt and tuff, which may owing to volcanic activity tending to diminish and cease.

Key words: Junggar basin, northwestern margin, Zhongguai swell, Carboniferous, Permian, volcanic rock

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