کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4690602 | 1636155 | 2008 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
From detached to attached carbonate buildup complexes - 3D seismic data from the upper Palaeozoic, Finnmark Platform, southwestern Barents Sea
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
Carbonate buildups were abundant during the Palaeozoic. Three-dimensional seismic data from the Finnmark Platform, Barents Sea, has been used to reconstruct the evolution of laterally extensive carbonate buildup complexes in space and time. The results suggest that the location of Upper Palaeozoic warm- and cool-water carbonate buildups from the Finnmark Platform is controlled by faults and the sea floor morphology at the time of their growth. A fluctuating sea level affected the growth of the carbonate buildups, but they also influenced their own environment by forming lagoons, atoll-like ridges and possibly areas with restricted circulation. Warm-water carbonate buildups, forming ridges and isolated mounds, occur in the Gipsdalen Group (latest Serpukhovian-mid-Sakmarian), where they initially grew in a detached platform setting. The carbonate buildups are several tens of kilometres long, up to 2.5Â km wide and 300Â m thick, and interpreted to consist of vertically stacked complexes of sub-seismic scale carbonate buildups. Evaporites were deposited and later subject to karstification, possibly during a period of sub-aerial exposure, before a transgression and the subsequent carbonate deposition and buildup growth bridged the detached platform with the attached platform. In the Bjarmeland Group (Lower Permian) 0.35-4.8Â km wide, 1.5-27Â km long and 60-420Â m thick cool-water bryozoan-dominated straight, sinuous and continuous carbonate ridges or atoll-like ridges are located on top of the warm-water carbonate structures. Three-dimensional maps of Upper Palaeozoic carbonate buildups document their geomorphology, distribution and size through time. The lateral and vertical growth of carbonate buildups has been reconstructed, revealing how their distribution changed over time and with changing environmental settings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sedimentary Geology - Volume 206, Issues 1â4, 30 April 2008, Pages 17-32
Journal: Sedimentary Geology - Volume 206, Issues 1â4, 30 April 2008, Pages 17-32
نویسندگان
Bjarne Rafaelsen, Geir Elvebakk, Karin Andreassen, Lars Stemmerik, Arnout Colpaert, Tommy J. Samuelsberg,