吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (5): 1405-1415.doi: 10.13278/j.cnki.jjuese.20170119

• 地质与资源 • 上一篇    下一篇

塔里木盆地麦盖提斜坡皮山北新1井白云质角砾岩地层时代厘定

罗少辉1, 李九梅2,3, 王辉1   

  1. 1. 中国石化西北油田分公司勘探开发研究院, 乌鲁木齐 830011;
    2. 河北工程大学河北省资源勘测研究重点实验室, 河北 邯郸 056038;
    3. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249
  • 收稿日期:2017-12-27 发布日期:2018-11-20
  • 作者简介:罗少辉(1979-),男,工程师,主要从事油气勘探工作,E-mail:luoshaohui1@163.com
  • 基金资助:
    国家科技重大专项（2011ZX05049-001-002）

Age Determination of Dolomite Breccia in Well PSBX1 of Markit Slope in Tarim Basin

Luo Shaohui1, Li Jiumei2,3, Wang Hui1   

  1. 1. Institute of Exploration and Development of Northwest Oil Branch, SINOPEC, Urumqi 830011, China;
    2. Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, Hebei, China;
    3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
  • Received:2017-12-27 Published:2018-11-20
  • Supported by:
    Supported by Major National R & D Projects (2011ZX05049-001-002)

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摘要： 本文结合岩石薄片、古生物孢粉、同位素、铂族元素、野外露头剖面等资料，对塔里木盆地麦盖提斜坡皮山北新1井钻遇的一套白云质角砾岩地层时代进行了厘定。结果认为：6 884~7 068 m段归属古近系吐依洛克组，化石含量较少；7 068~7 150 m段归属白垩系依格孜牙组，孢粉化石丰富。该井古近纪与白垩纪地层界线深度7 068 m，该位置碳同位素的突变指示海洋环境的剧烈变化，这可以与全球K/E界线处对比。同时，铂族元素在该深度见到明显的异常，其含量明显增大，尤其以Rh、Ru、Ir、Os等最为明显。通过此次厘定，丰富了对麦盖提斜坡晚白垩世—古近纪早期沉积格局的认识。

关键词: 塔里木盆地, 麦盖提斜坡, 皮山北新1井, 白云质角砾岩, 地层时代厘定

Abstract: The dolomitic breccia strata is drilled in Well PSBX1, Maigaiti slope, Tarim basin. Its age is determinated based on the data of thin section, paleontology sporopollen, isotope, platinum group elements and outcrop profiles. The results show that the 6 884-7 068 m well interval belongs to the Paleogene Tuyiluoke Group, which has very few fossils, 7 068-7 150 m well interval belongs to the Upper Cretaceous Yigeziya Group, which has a lots of sporopollen fossils. The Paleogene-Cretaceous boundary of this well lies at 7 068 m with an abrupt difference in carbon isotope, indicating a dramatic change of marine environment, which can be compared with the global K/E boundary. At this depth, the platinum group elements has obvious anormalies, their contents increase significantly, especially Rh, Ru, Ir, Os and so on. Through this determination, we have enriched our uderstanding of the sedimentary pattern of the Markit slope during the Late Cretaceous to the Early Paleogene.

Key words: Tarim basin, Markit slope, Well PSBX1, carbonate rocks, stratigraphic age determination

中图分类号: 

  • P59
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