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物探与化探  1988, Vol. 12 Issue (3): 224-228    
  论文 本期目录 | 过刊浏览 | 高级检索 |
四川盆地雅安至天全白垩系一下第三系古地磁研究
庄忠海1, 蒋兴治1, 马醒华2, 任希飞3, 徐树金3, 田端孝3
1. 成都地质矿产研究所;
2. 地质力学研究所;
3. 西南石油地质局地质综合研究大队
A PALEOMAGNETIC STUDY ALONG THE YAAN-TIANQUANCRETACEOUS-EOGENE SECTION IN SICHUAN BASIN
Zhuang Zhonghai1, Tian Duanxiao1, Ma Xinghua2, Ren Xifei3, Jiang Xingchi3, Xu Shujin3
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摘要 

对采自四川雅安新开店至天全始阳剖面白垩系21个采点197块样品、下第三系15个采点129块样品进行了古地磁研究。由特征剩磁方向统计,分别获得了采样区白垩纪和早第三纪的古纬度为32.5°N和31.7°N;古地磁极点位置分别为φ=172°E,λ=81.8°N和φ=75.7°E,λ=88.1°N;建立了白垩系和下第三系的磁极性地层剖面,并提出了有关地层划分和对比的意见。根据各个时期磁偏角的变化特征和古地磁极的游移轨迹可以看出,从白垩纪开始至早第三纪中晚期,采样区地块先顺时针方向旋转,然后又逆时针方向旋转。

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Abstract

197 Cretaceous samples from 21 sites and 129 Eogene samples from 15 si-tes along the Yaan-Tianquan section in Sichuan basin are studied paleomagneti-cally. Based on statistical analysis of the characteristic directions of remanen-ce, it is obtained that the paleolatitudes of Cretaceous and Eogene are respec-tively 32. 5°Nand 31. 7°N, and the paleopole positions are repectively φ= 172°E λ = 81. 8°Nand φ= 75. 7°E, λ = 88.1°N. In addition, the magneto-stratigraphicsequence of Cretaceous-Eogene is established, and some ideas about stratigraph-ic division and correlation are suggested.From the variation characteristics of dechnations and the wandeling pathof the paleopole, it is conciuded that, during the period from Cretaceous to Eo-gene, the sampling area must have first rotated clockwise and then counter-clockwise.

     出版日期: 1988-06-24
引用本文:   
庄忠海, 蒋兴治, 马醒华, 任希飞, 徐树金, 田端孝. 四川盆地雅安至天全白垩系一下第三系古地磁研究[J]. 物探与化探, 1988, 12(3): 224-228.
Zhuang Zhonghai, Tian Duanxiao, Ma Xinghua, Ren Xifei, Jiang Xingchi, Xu Shujin. A PALEOMAGNETIC STUDY ALONG THE YAAN-TIANQUANCRETACEOUS-EOGENE SECTION IN SICHUAN BASIN. Geophysical and Geochemical Exploration, 1988, 12(3): 224-228.
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