We performed on paleomagnetic investigation of the Upper Cretaceous red sandstones collected from Fujiau and Guangdong provinces. Significant characteristic directions were isolated by principal comPonent analysis fro...We performed on paleomagnetic investigation of the Upper Cretaceous red sandstones collected from Fujiau and Guangdong provinces. Significant characteristic directions were isolated by principal comPonent analysis from 22 of 25 and 9 of 14 sampling sites iu Fujian and Guangdong,respectively. Maximum concentration of global mean directions every province is achieved at 70 %and complete (100 % ) untilting for Fujian and Guangdong, respectively. We regarded these mean directions as the Late Cretaceous paleomagnetic directions and calculated virtual geomagnetic poles (VGPs); Fujian, Lat. /Lon. = 79. 4°N/210. 3°E (α95= 5. 1°) and Guangdong, Lat. /Lon. = 80. 1°N/193. 4°E (α95=8. 0°). These two VGPs are nearly equal to each other and to a mean VGP from Sichuan Province reported previously. This observation suggests no relative movement among three regions, Fujian, Guangdong and Sichuan, since the Late Cretaceous. Two VGPs from this study are significantly different from previously reported VGPs from the same regions. Further systematic paleomagnetic works are needed to clarify this difference of VGP Positions.展开更多
文摘We performed on paleomagnetic investigation of the Upper Cretaceous red sandstones collected from Fujiau and Guangdong provinces. Significant characteristic directions were isolated by principal comPonent analysis from 22 of 25 and 9 of 14 sampling sites iu Fujian and Guangdong,respectively. Maximum concentration of global mean directions every province is achieved at 70 %and complete (100 % ) untilting for Fujian and Guangdong, respectively. We regarded these mean directions as the Late Cretaceous paleomagnetic directions and calculated virtual geomagnetic poles (VGPs); Fujian, Lat. /Lon. = 79. 4°N/210. 3°E (α95= 5. 1°) and Guangdong, Lat. /Lon. = 80. 1°N/193. 4°E (α95=8. 0°). These two VGPs are nearly equal to each other and to a mean VGP from Sichuan Province reported previously. This observation suggests no relative movement among three regions, Fujian, Guangdong and Sichuan, since the Late Cretaceous. Two VGPs from this study are significantly different from previously reported VGPs from the same regions. Further systematic paleomagnetic works are needed to clarify this difference of VGP Positions.
