Alluvial fan sedimentation and structure of the southern Molasse Basin margin, Lake Thun area, Switzerland
Alluvial fan sedimentation and structure of the southern Molasse Basin margin, Lake Thun area, Switzerland
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DOI：
10.5169/seals-167260
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
F. Schlunegger;A. Matter;Mange
中科院分区：
文献类型：
--
作者：
F. Schlunegger;A. Matter;Mange
图恩地区的Chattian下淡水Molasse （USM）由一系列厚厚的大陆沉积物组成，这些沉积物分布在亚高山Molasse的三个叠瓦状逆冲片（Steffisburg, Zulg-Hombach, Blueme）和原生高原Molasse的大片地区。露头岩相分析、砾岩碎屑计数、砂岩岩相学、重矿物分析、两口深探井数据和地震数据的补充，使冲积层的结构恢复、亚高山和原生超重力体的对比以及冲积扇系统的几何形状和相演化得以重建。在构造最高的蓝脉逆冲层中保存了最完整的序列，长度超过4500米
The Chattian Lower Freshwater Molasse (USM) of the Thun area comprises a thick series of continental sediments which occur in three imbricate thrust sheets (Steffisburg, Zulg-Hombach, Blueme) of the Subalpine Molasse and over wide areas of the autochthonous Plateau Molasse. Facies analysis of outcrops, complemented by conglomerate clast counts, sandstone petrography, heavy mineral analysis and data from two deep exploration wells and seismics permit structural restoration of the thrust sheets, correlation of subalpine and autochthonous USM and consequently the reconstruction of the geometry and facies evolution of the alluvial fan systems. The most complete succession measuring more than 4500 m is preserved in the structurally highest Blueme thrust sheet