新疆卡克地區(qū)上石炭統(tǒng)別根他烏組沉積相分析
[Abstract]:In this paper, the sedimentary facies of the Upper Carboniferous Beitawu formation in Kak area, Xinjiang, have been systematically studied. The main achievements and understandings are as follows: 1. The carbonate rocks of the Begentawu formation are divided into 9 main rock types: microcrystalline limestone, bioclastic microcrystalline limestone, and bioclastic microcrystalline limestone. Bioclastic microcrystalline limestone, containing bioclastic bright grained like globular limestone, sparkling bioclastic limestone, bioclastic gravelly limestone, sandy gravelly limestone, There are 10 main rock types of continental clastic rocks: conglomerate, calcareous sandstone, calcareous coarse sandstone, quartz sandstone, calcareous sandstone, quartz fine sandstone, calcareous sandstone. Calcareous siltstone, argillaceous siltstone and calcareous mudstone. Lithologic assemblage 1-1: the lower unit is mainly composed of thin calcareous sandstone or thin layer sandy limestone, the upper unit is mainly calcareous mudstone, and the lower unit is mainly composed of gray and black sandy gravel limestone, and the upper unit is mainly composed of calcareous mudstone and calcareous mudstone. The upper unit is mainly grayish-white silt-medium sandy lime-rock, the lithologic assemblage is 2-1: the lower unit is bioclastic bright crystalline spherulite, the upper unit is quartz sandstone, and the lithologic combination 2-2: the lower unit is calcareous mudstone. The upper unit is mainly composed of gray-black thin layer bioclastic microcrystalline limestone or bioclastic bright crystal globular limestone, and the lithologic assemblage is 3-1: the lower unit is mainly marl. The upper unit is dominated by gray-black thin layer bioclastic microcrystalline limestone. Four sedimentary facies have been identified in the Begentawu formation, namely, barrier coast, open platform, platform edge and platform margin slope, and 6 subfacies, namely, tidal flat, tidal channel, lagoon, etc. The sedimentary facies models of the Guintaowu formation, including barrier coast model and platform gentle slope model, have been established for the study of platform shoal, upper slope and lower slope, and 11 microfacies. 5.
【學位授予單位】:中國地質(zhì)大學(北京)
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:P512.2;P534.45
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