地震地质 ›› 1999, Vol. 21 ›› Issue (4): 301-308.

• 构造地质 • 上一篇    下一篇

天山北麓岩石漆显微层理层序的初步建立及其年代学意义

周本刚1, 柳覃卓2, 张裕明1   

  1. 1. 中国地震局地质研究所 北京 100029;
    2. Lamont-Doherty Earth Observatory of Columbia University, NY 10964-8000 USA
  • 收稿日期:1998-08-31 修回日期:1999-06-30 出版日期:1999-12-08 发布日期:2009-11-25
  • 基金资助:
    地震联合基金资助(95233);中国地震局地质研究所论著99B0050.

ROCK VARNISH MICROLAMINATIONS FROM THE NORTHERN TIAN SHAN,XINJIANG AND THEIR CHRONOLOGICAL IMPLICATIONS

Zhou Bengang1, Liu Tanzhuo2, Zhang Yuming1   

  1. 1. Insitute of Geology, China Seismological Bureau, Beijing 100029;
    2. Lamont Doherty Earth Observatory of Columbia university, Palisades, NY10964, USA
  • Received:1998-08-31 Revised:1999-06-30 Online:1999-12-08 Published:2009-11-25

摘要: 对天山地区的调查发现天山北麓有较好的岩石漆发育。利用特殊的超薄片磨制技术,在对100 个岩石漆超薄切片的显微影象分析对比后,初步建立了研究区内晚更新世以来岩石漆显微层理的标准层序,经过年代校正后,给出了该层序的大致年代控制。并对其在估计河流阶地、断层陡坎等地貌面时代方面的应用作了探讨。

关键词: 相对年代学, 天山, 岩石漆, 显微层理

Abstract: We collected 100 rock varnish samples from the northern Tian Shan for ultra-thin sectioning. Laterally continuous dark and orange microlaminations are observed in these ultra-thin sections of rock varnish. Microprobe chemical analyses indicate that dark layers in the varnish are rich in Mn and orange layers are poor in Mn. Microscopic examinations of varnish ultra-thin sections reveal a lamination pattern that is regionally consistent and comparable. Based on paleoclimatic and geomorphic age control,the Late Pleistocene varnish lamination sequence is tentatively established and its chronological impications are explored as well.

Key words: Related chronology, Tian Shan, Rock varnish, Microlamination