Development of the Witwatersrand Basin, South Africa
Development of the Witwatersrand Basin, South Africa
复制标题
南非威特沃特斯兰德盆地的开发
DOI：
10.1144/gsl.sp.1995.095.01.15
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Camille E. Spencer
中科院分区：
文献类型：
--
作者：
M. Coward;R. Spencer;Camille E. Spencer
威特沃特斯兰德盆地是在林波波板块边缘以南已经固结的陆壳上发育起来的一个大型内陆盆地，其形成于侏罗纪。它是一个挠曲盆地，形成于一个主要的厚皮冲断系统的东南部，并被东南部的第二个冲断系统所改造。对几千公里的地震数据的研究，加上地球物理模型和新的实地数据，使人们能够绘制逆冲断层及其相关的上盘隆起的地图，并根据中兰德时代的沉积物确定其年代。盆地随后在大型拆离断层上经历了伸展。相关的半地堑填充有普拉特贝格沉积物和中间火山岩的生长序列。这些地堑在后普拉特贝格和后德兰士瓦时代被倒置。对威特沃特斯兰德盆地的研究使我们能够建立起可用于解释新生代山脉的构造模型。
Abstract The Witwatersrand basin is a large hinterland basin of Archaean age developed on already consolidated continental crust south of the Limpopo plate margin. It is a flexural basin formed southeast of a major thick-skinned thrust system, modified by a second thrust system to the southeast. Studies of several thousand kilometres of seismic data, together with geophysical modelling and new field data, have allowed the thrusts and their associated hanging-wall uplifts to be mapped and dated, relative to sediments of Central Rand age. The basin subsequently underwent extension on large detachment faults. Associated half-grabens are infilled with growth sequences of Platberg sediments and intermediate volcanics. These grabens were inverted during post-Platberg and post-Transvaal times. Studies of the Witwatersrand Basin allow tectonic models to be developed for the Archaean which can be used to help interpret Cenozoic mountain belts.