摘要
寒武、奥陶纪，在扬子陆块东南缘，发育—条横垣两千多公里的古台缘斜坡带。本文综合研究了此斜坡带的沉积类型，计有重力滑塌、滑移沉积、重力流沉积（碎屑流、浊流、颗粒流）、等深流沉积、上升流沉积、风暴流沉积以深水瘤状灰岩和生物扰动灰岩。台缘斜坡带沉积序列所反映的大地构造背景为被动大陆边缘，当时华南小洋（或海）盆为—拉伸下沉盆地。
Located in the southeast sector of Yangtze platform, a Cambritan-ordovician palaeoslope extends more than 2000 km. The comprehensive research on the sedimentary types of palaeoslope zone covers the gravitational slump,slip,gravity flow including detrial flow,turbidity current and grain flow,contournite,raised flow,storm flow and deep water knobby limestone as well as bioturbed limestone. According to the sedimentary features and sequences from the Cambrian to the middle Ordovician period,the tectonic setting of the palaeoslope zone is passive continental margin and the South China ocean or sea basin belongs toan extensional subsidence basin. The research has an important theory and practical significances for thestudy of lower Paleozonic tectonic evolution in South China and for the prospecting of Petroleum and naturalgas.
出处
《江苏地质》
1996年第1期9-17,共9页
Jiangsu Geology
关键词
寒武纪
奥陶纪
古斜坡
沉积类型
扬子陆块
Cambrian Period Ordovician Period Palaeoslope zone Sedimentary type Southeast China
