摘要
寒武—奥陶纪时,在中国南方曾经存在一个十分壮观的大陆斜坡,现今主要沿着无锡—皖南—赣西北—鄂东南—湘西—黔东—广西呈—带状分布。据研究,该大陆斜坡发育完好,无论其规模还是矿藏拥有量均为国内外所罕见。因此,进一步加强斜坡的基础地质研究,对于阐明其形成机理和演化发展就显得尤为重要。本文在这里仅讨论九种确定古大陆斜坡方向(倾向)的方法,旨在为恢复岩相古地理以及解释斜坡沉积物的成因提供理论依据和基础地质资料。
During the Cambrian to Ordovinian period,there was a very magnificent continental slope,which is band-shaped distributing along the line Shanghai, Wuxi, southern Anhui. north west Jiangxi,southeast Hubei,western Hunan ,eastern Guizhou and Guangxi. The study shows that this continental slope developed very well,both the slope scale and the quantities of mineral resources are rare in China and abroad. Therefore,it is specially important to strengthen further basic geological studies in order to clarify formational mechanism and evolution of the slope. In this article,nine kinds of methods of determining paleoslope direction are discussed only. The aim is to furnish theoretical evidence and basic geological data so as to recovering lithofacies paleogeography and accounting for origin of slope sediments. Nine kinds of methods are as follows: slumping folds, clastic fabric of slumping breccias, synsedimentary boudins, trace fossiles, structures of beded plane, intraformational truncation structures, cross-bedding, lithofacies and palaeontologic distribution.
出处
《矿物岩石》
CAS
CSCD
1993年第2期78-84,共7页
Mineralogy and Petrology
关键词
大陆斜坡
方向
寒武-奥陶纪
continental slope
direction
Cambrian-Ordovinian period
