西南石油大学学报(自然科学版) ›› 2007, Vol. 29 ›› Issue (1): 34-36.DOI: 10.3863/j.issn.1000-2634.2007.01.010

• 地质勘探 • 上一篇    下一篇

塔中北部中下奥陶统鹰山组白云岩特征及成因

李凌1 谭秀成1 陈景山1 赵永刚1 何碧竹2

  

  1. 1.西南石油大学资源与环境学院,四川 成都,610500; 2.中原油田分公司西部勘探项目经理部,河南 濮阳,457000
  • 收稿日期:2006-09-12 修回日期:1900-01-01 出版日期:2007-04-20 发布日期:2007-04-20
  • 通讯作者: 李凌

CHARACTERISTICS AND ORIGIN OF DOLOSTONES IN YINGSHAN FORMATION, LOWER AND MIDDLE ORDOVICIAN, NORTH OF CENTRAL TARIM BASIN

LI Ling TAN Xiu-cheng CHEN Jing-shan ZHAO Yong-gang HE Bi-zhu

  

  1. Southwest Petroleum University, Chengdu Sichuan 610500,China
  • Received:2006-09-12 Revised:1900-01-01 Online:2007-04-20 Published:2007-04-20
  • Contact: LI Ling

摘要:

塔里木盆地塔中北部中下奥陶统鹰山组中白云岩和白云石化作用相当普遍,由台地相多种白云岩、灰质白云岩、白云质灰岩和灰岩的不等厚互层组成。其中的白云岩主要包括结晶白云岩、残余颗粒白云岩、残余灰质白云岩和隐藻白云岩等类型。通过对这些白云岩的产状、岩矿和地球化学等特征的分析,认为本区鹰山组白云岩以近地表蒸发海水交代成因为主,可以用潮坪环境蒸发白云石化作用模式和回流渗透白云石云化作用模式来解释。

关键词: 白云岩, 成因, 奥陶系, 鹰山组, 塔里木盆地

Abstract: There are large amount of dolostone and wide spread dolomization in Yingshan Formation of Lower and Middle Ordovician in North of central Tarim basin,the strata is composed of all kinds of dolostone, limy dolostone, dolomited limestone and limestone which are interbedded with different thickness and deposited on carbonate platform . The dolostone includes sparry dolostone, residualgrained dolostone, residual limy dolostone and algae dolostone. By analyzing the attitude, minerlogy and geochemistry of the dolostone, the origin of dolostone is regarded as a kind of replaced one at nearsurface in evaporated sea water which can be interpreted in such model as tidal evaporating dolomiteforming and flowingdown dolomiteforming.

Key words: dolostone, origin, ordovician, Yingshan Formation, Tarim basin

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