2017年6月第36卷第3期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10. 3969/J. ISSN.1000-3754.2017. 03. 026
June，2017 Vol. 36 Na. 3
四川盆地中新生代未发生旋转的古地磁证据
王千军’时保宏？
（1.中国石化胜利油田分公司西部新区研究院，山东东营257000；2.西安石油大学地球科学与工程学院，陕西西安710065）摘要：四川盆地中生代以来沉积中心经历弧形迁移，盆地是否发生旋转具有争议。根据古地磁数据计算古纬度表明，四川盆地晚二叠世以来主要经历了大规模北向漂移、南向漂移、快速北向漂移过程。以现有精度古地磁数据分析表明，四川盆地中生代以来，其相对于欧亚大陆、扬子地块旋转量都小于数据本身的误差值，相对于欧亚大陆和扬子地块都没有有效意义的旋转。综合分析认为，四川盆地中新生代沉积中心的弧形迁移，反映了周
缘造山带不同时期的构造活动对四川盆地沉降及沉积的控制。关键词：四川盆地；弧形迁移；古地磁；旋转；沉积中心
中图分类号：P318.4*4
文献标识码：A
文章编号：1000-3754（2017）03-0141-07
PALEOMAGNETICEVIDENCEOFTHENON-ROTATIONFOR
MESO-CENOZOICSICHUANBASIN
WANG Qianjun'，SHI Baohong
(1.Western New Prospect Research Institute,Sinopec Shengli Oifield Company,Dongying257000,China;
2. School of Earth Sciences and Engineering,Xi'an Shiyou University, Xi'an 710065, China)
Abstract: Since Mesozoic era, the sedimentary center of Sichuan Basin has undergone arcuate migration, but whether the basin has been rotated is still left in the air. The calculated paleolatitude by the paleomagnetic date shows that since Late Permian Epoch, the basin has undergone the following processes : large-size migration to the north, migration to the south and rapid migration to the north. According to the current precision analysis of the pal-eomagnetic date, since the Mesozoic era of Sichuan Basin, relative to the Eurasian Continent and Yangtze Block, the rotated amounts are less than the error values of the data themselves, and moreover there are no effectively sig nificant rotations. The comprehensive analysis shows that the arc migrations in the Meso-Cenozoic sedimentary cen-ters response the controls of the structural activities of the marginal orogenic belts in different periods on the settle-ment and sedimentation of Sichuan Basin.
Key words:Sichuan Basin; arcuate/arc/curvic migration; paleomagnetism; rotation; deposition/sedimentary center
四川盆地是中国中西部地区最为典型的叠合盆地之一，中生代以来发育了多期前陆盆地，并且以
收稿日期：2016-09-09
改回日期：2016-12-02
四川盆地中部为中心，沉积中心在盆地西部和北部经历了多次的弧形迁移与转换，沉积序列不断更替
（），
作者简介：王千军，男，1972年生，高级工程师，主要从事油气勘探与构造地质研究。
E-mail:wangqianjun3650@163.com
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