MICROBIALITE DEVELOPMENT DURING THE PROTRACTED INHIBITION OF SKELETAL-DOMINATED REEFS IN THE ZHANGXIA FORMATION (CAMBRIAN SERIES 3) IN SHANDONG PROVINCE, NORTH CHINA
MICROBIALITE DEVELOPMENT DURING THE PROTRACTED INHIBITION OF SKELETAL-DOMINATED REEFS IN THE ZHANGXIA FORMATION (CAMBRIAN SERIES 3) IN SHANDONG PROVINCE, NORTH CHINA
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山东省张夏组（寒武系 3）骨控礁长期抑制过程中微生物岩的发育
DOI：
10.2110/palo.2016.097
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发表时间：
2017-09
期刊：
影响因子：
1.6
通讯作者：
Yan Zhen
中科院分区：
文献类型：
--
作者：
Ezaki Yoichi;Liu Jianbo;Adachi Natsuko;Yan Zhen
摘要：山东莱芜九龙山剖面张夏组下部（Crepicephalina带：寒武系3统Drumian）深水潮下环境中发育珊瑚虫-石屑海绵-微生物生物礁。这些珊瑚礁有几十厘米厚，形成于微生物来源的稳定基质上。的珊瑚礁是明确区分从demosonge-calcimmicrobial珊瑚礁和附生生物礁的树枝状血栓和直接覆盖的柱状层状叠层石的发展。海绵的微生物降解促进了泥晶、泥粒状和凝块碳酸盐的沉淀，导致形成含珊瑚虫的血栓质核心。而附生植物则倾向于向上生长，附生植物团块的聚集形成了树状血栓和覆盖在其上的柱状骨架。微生物岩结构的显著变化被认为反映了某种生态演替，可能是环境条件的变化。因此，生物礁是异养和光合自养微生物共同作用的结果。在凝块岩和柱状岩间的空间中，普遍存在向上凹的充填物和侧向桥，表明生物膜的侧向产物上存在幕式沉积，突出了柱状层状结构。珊瑚石海绵微生物礁的特点是先锋，稳定和高潮阶段的微生物演替。他们是特定年龄的功能，微生物为主的珊瑚礁从深潮下带的设置在Drumian阶段，当微生物为主的珊瑚礁被抑制全球范围内，早在早奥陶世周围的珊瑚礁建设的政权转变。
Abstract: Coralomorph-lithistid demosponge-microbial reefs are developed in deep subtidal settings of the lower part of the Zhangxia Formation (Crepicephalina Zone: Drumian of Cambrian Series 3) in the Jiulongshan section of the Laiwu area of Shandong Province, North China. These reefs are several tens of centimeters thick and formed upon stabilized substrates of microbial origin. The coralomorph-bearing reefs are clearly distinguishable from demosponge-calcimicrobial reefs and Epiphyton bioherms by the development of dendritic thrombolites and the immediately overlying columnar-layered stromatolites. The microbial degradation of sponges facilitated the precipitation of micritic, peloidal, and clotted carbonates, leading to the formation of coralomorph-bearing thrombolitic cores. In contrast, Epiphyton preferentially grew upward, and the accumulation of Epiphyton clumps formed the dendritic thrombolites and the overlying columnar frameworks of the stromatolites. Marked changes in the microbialite texture are considered to reflect some kind of ecological succession, possibly changing environmental conditions. Therefore, the reefs originated from both heterotrophic and photoautotrophic microbial activities. Concave-upward infillings and lateral bridges are common in the interthrombolite and intercolumnar spaces, suggesting episodic sedimentation on the lateral outgrowths of biofilms and highlighting the columnar-layered structures. The coralomorph-lithistid demosponge-microbial reefs are characteristic of the pioneering, stabilizing, and climax stages of a microbial succession. They are age-specific features of microbial-dominated reefs from deep subtidal settings in the Drumian Stage, when skeletal-dominated reefs were inhibited globally, long before the regime shift in reef construction around the Early Ordovician.
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影响因子：
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作者：
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DOI：
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DOI：
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发表时间：
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Physical review. E, Statistical, nonlinear, and soft matter physics
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DOI：
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