摘要
本文以某些大胆设想、结合当代地学科学前沿研究,分析了发育于早石炭世的玄武质火山岩和热液活动时空分布特征和已有的古地磁资料相印证,论述地壳热膨胀与沉积基底地貌的关系;通过沉积物厚度获取的沉积速率时空分布,探讨了沉积基底形变程度和性质;认为全球海平面变化、地壳热膨胀引起地壳微型扩张及中上扬子在石炭纪纬度的迁移等是控制沉积古地理的主要因素,并以此对中上扬子石炭纪进行沉积古地理宏观演化分析。
In this paper gives an analysis on the time_spatial distribution of basaltic volcanic rock and hydrothermal activity in early Carbonic by comparison with the paleomagnetic data, and introduces to the relation between the crustal thermal expansion and the sedimentary basement landforms. According to the time_spatial distribution of sedimentary rate available from the thickness of sedimentation, the author discusses the deforming degree of sedimentary basement and its character. It may be considered that the changing of global sea level, the crustal microexpansion caused by crustal thermal expansion and latitude displacement of Carboniferous system in middle_upper Yangzi should to be the critical factor on controlling the sedimentary paleogeograph.On the basis of the above study the macro revolution analysis of paleogeography of Carbonic in the middle_upper Yangzi is conducted
出处
《贵州地质》
1999年第4期294-300,共7页
Guizhou Geology
