CAJ | 학술논문

针对中国西部及中亚地区以红色陆相沉积岩为主的白垩纪—新生代地层中普遍存在古地磁数据磁倾角偏低的现象，对青藏高原东南缘川滇地块中部大姚地区古近纪陆相红层进行了磁倾角偏低研究。实验结果表明，川滇地块内部古近纪陆相红层古地磁数据不存在明显的磁倾角偏低的现象。结合前人对川滇地块内部古地磁数据及周缘新生代走滑断裂的活动演化历史研究，确定川滇地块自中中新世以来川滇地块内部表现为刚性旋转，楚雄地区则发生局部构造旋转叠加。
침대중국서부급중아지구이홍색륙상침적암위주적백성기—신생대지층중보편존재고지자수거자경각편저적현상，대청장고원동남연천전지괴중부대요지구고근기륙상홍층진행료자경각편저연구。실험결과표명，천전지괴내부고근기륙상홍층고지자수거불존재명현적자경각편저적현상。결합전인대천전지괴내부고지자수거급주연신생대주활단렬적활동연화역사연구，학정천전지괴자중중신세이래천전지괴내부표현위강성선전，초웅지구칙발생국부구조선전첩가。
A paleomagnetic experiment was carried out on Paleocene red beds of Dayao basin in Chuan-Dian Fragment for studying the common phenomenon of inclination shallowing in western China and Central Asia. Paleomagnetic researches demonstrate that in?clination shallowing of Paleogene red beds does not obviously exist in the study area. Combined with previous paleomagnetic studies and Cenozoic peripheral fault structures, the authors hold that Chuan-Dian Fragment has rotated as a rigid block with a little south?ward escape since middle Miocene, though magnitudes of tectonic rotation are significantly different in Chuxiong area, where there has occurred local structural rotation superimposition.