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首页> 外文期刊>Facies >Internal structure and paleoecology of the lower Permian Uzunbulak reef complex of the Tarim Basin, Northwest China
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Internal structure and paleoecology of the lower Permian Uzunbulak reef complex of the Tarim Basin, Northwest China

机译：塔里木盆地下二叠统乌祖布拉克礁复合体的内部结构和古生态

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摘要

The internal construction and biotic communities of the Uzunbulak reef of the northwestern Tarim Basin are studied for the first time. The reef was built during the Sakmarian, while the reef substrate and capping beds are of latest Asselian and earliest Artinskian ages, respectively. The reef substrate beds are composed of skeletal and oncoid grainstone. Those fusulinid-dominated skeletal shoals and oncoid banks indicate a high-energy environment and produced local topographic highs on which the reef grew. Reef framework consists mainly of calcisponge bafflestone, calcisponge-Thartharella framestone, and Tubiphytes, Archaeolithoporella and Girvanella boundstones. Calcisponges were the primary frameconstructors that baffled high-energy currents. Archaeolithoporella, Tubiphytes, Girvanella and possibly microbes acted as the primary binders for the boundstone framework. Fusulinids and brachiopods were common reef dwellers. The interreef facies sediments are composed of skeletal-crinoid wackestone-packstone. Most of bioclasts have thick, micritized envelopes. The back-reef facies deposits consist of alternating skeletal packstone to wackestone and black shale. Sea-level fluctuations were probably accountable for the reef growth and demise.
机译：首次研究了塔里木盆地西北部乌祖布拉克礁的内部构造和生物群落。珊瑚礁建于萨克曼时期，而珊瑚礁基质和盖层分别是阿瑟利时代和阿尔丁斯基最早的时代。珊瑚礁基质床由骨骼和类瘤石组成。那些以镰刀状藻为主的骨骼浅滩和类瘤滩表明了高能环境，并产生了珊瑚生长的局部地形高点。礁石框架主要由钙镁合金挡板石，钙镁合金-沙氏菌框架石，土生植物，古细菌和Girvanella界石组成。钙盐是阻碍高能流的主要框架构造者。古生孢子菌，土生植物，长颈鹿和可能的微生物充当了界石骨架的主要粘合剂。梭形藻和腕足动物是常见的珊瑚礁居民。礁间相沉积物由骨架—类海蜡质砂岩—堆积石组成。多数生物破骨细胞都有较厚的微囊化包膜。礁后相沉积物由交替的骨架堆积石，瓦克石和黑色页岩组成。海平面的波动可能是珊瑚礁生长和灭绝的原因。

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