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首页> 外文期刊>Marine and Petroleum Geology >3D seismic analysis of karstified interbedded carbonates and evaporites, Lower Permian Gipsdalen Group, Loppa High, southwestern Barents Sea
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3D seismic analysis of karstified interbedded carbonates and evaporites, Lower Permian Gipsdalen Group, Loppa High, southwestern Barents Sea

机译：巴伦支海西南部Loppa High的下二叠系Gipsdalen组，岩溶化层状碳酸盐和蒸发岩的3D地震分析

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摘要

This paper presents a detailed seismic analysis of a hitherto undescribed Permian succession interpreted to consist of interbedded anhydrite and carbonate from the northern flank of the Loppa High, western Barents Sea. The Fafner succession forms a locally restricted transgressive unit down-dip on the rotated Loppa High. It is subdivided into four seismic sequences each interpreted to be composed of a basal transgressive anhydrite overlain by highstand carbonates. Fafner seismic sequences 2 and 3 include well-developed buildup complexes which in map view form polygonal patterns. Analysis of attribute maps indicates that the Fafner succession is overprinted by two dissolution systems related to two prominent events of subaerial exposure, creating numerous paleo-sinkholes, breccia-pipes, and collapsed composite cavern systems. The stratigraphical position of the Fafner succession, below the Mid Sakmarian-Artinskian Bjar-meland Group and above the Top 0rn unconformity, resembles that of the Lower Permian Gipshuken Formation on Spitsbergen, and the Fafner succession is thus regarded as its offshore equivalent.
机译：本文对迄今未描述的二叠纪演替进行了详细的地震分析，该二叠系被解释为由巴伦支海西部Loppa High北翼夹层的硬石膏和碳酸盐组成。 Fafner演替在旋转的Loppa High上形成了局部受限的海侵单元下倾。它分为四个地震序列，每个地震序列被解释为由高位碳酸盐覆盖的基底海侵硬石膏组成。 Fafner地震序列2和3包含完善的构造物，这些构造物在地图视图中形成多边形图案。对属性图的分析表明，Fafner序列被与两个重要的地下大气暴露事件相关的两个溶蚀系统覆盖，形成大量的古水坑，角砾岩管和坍塌的复合洞穴系统。 Fafner继承的地层位置在中萨克拉曼-阿丁斯基-比哈尔-梅兰组之下，在顶部0rn不整合面之上，类似于斯匹次卑尔根的下二叠纪Gipshuken组，因此，Fafner继承被认为是其海上等价物。

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