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现代地质 ›› 2005, Vol. 19 ›› Issue (4): 608-614.

• 技术方法 • 上一篇    下一篇

中国大陆科学钻探主孔100~2 000 m测井磁化率和磁三分量分析

张红杰,潘和平,骆淼,李清松,赵卫平   

  1. 中国地质大学 地球物理与空间信息学院,湖北  武汉430074
  • 收稿日期:2005-05-10 修回日期:2005-09-10 出版日期:2005-04-20 发布日期:2005-04-20
  • 作者简介:张红杰,女,1983年出生,地球物理专业,主要从事测井资料解释工作。
  • 基金资助:

    中国地质调查局中国大陆科学钻探工程测井专题研究。

Analysis on Magnetic Susceptibility and Magnetic Tricomponent Data from Well Logging in the Main Hole (100-2,000 m) of CCSD

ZHANG Hong-jie, PAN He-ping, LUO Miao, LI Qing-song, ZHAO Wei-ping   

  1. Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan,Hubei430074, China
  • Received:2005-05-10 Revised:2005-09-10 Online:2005-04-20 Published:2005-04-20

摘要:

对比分析了中国大陆科学钻探(CCSD)主孔100~2 000 m测井磁化率与岩心样本磁化率的测量结果,二者具有较好的一致性。测井磁化率统计结果表明CCSD主孔100~2 000 m超高压变质岩的磁化率从高至低依次为:蛇纹岩、石英榴辉岩、金红石榴辉岩、正片麻岩、退变质榴辉岩、多硅白云母榴辉岩、副片麻岩、绿泥石角闪岩、角闪岩。由CCSD主孔100~2 000 m磁三分量测量数据得到磁异常的△BZ、△BH和△BT值,结合前人所做的岩石学研究分析发现:主孔530~575 m的磁异常主要由岩石的金红石矿化、钛磁铁矿化和磁铁矿化引起,604~643 m和652~678 m的磁异常主要由岩石的蛇纹石化引起;钻孔中岩层的磁化率对磁三分量异常起着主要的决定作用,高磁化率岩层都表现出较大的磁三分量异常。

关键词: 中国大陆科学钻探(CCSD), 超高压变质岩, 测井, 磁化率, 磁三分量

Abstract:

The study contrasted and analyzed magnetic susceptibility data obtained by well logging and core measurements from 100 to 2,000 m in the main hole of Chinese Continental Scientific Drilling (CCSD), the results were coherent. The statistical results of ultra-high pressure (UHP) metamorphic rocks- logging susceptibility indicated that the susceptibility  became low gradually from serpentinite to quartz eclogite, rutile-bearing eclogite, orthogneiss, retrograded eclogite, phengite eclogite, paragneiss, chlorite amphibolite and amphibolite.Magnetic anomaly △BZ、△BH and △BT were computed from the data of tricomponent magnetic survey from 100 to 2,000 m in CCSD main hole. According to  the previous petrologic research, it was shown that  the magnetic anomaly in 530575 m was induced by magnetite, rutile, titano-magnetite, and the magnetic anomalies in 610640 m and 655680 m were induced by serpentinized peridotite, and that magnetic anomalies were dominated mainly by rock's susceptibility, and rocks which had high susceptibility displayed clear anomalies in the borehole.

Key words: Chinese Continental Scientific Drilling (CCSD), ultra-high pressure (UHP) metamorphic rock, well logging, magnetic susceptibility, magnetic tricomponent

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