摘要：In order to understand redox variations and organic matter accumulation on the Yangtze carbonate platform during the Late Ediacaran-Early Cambrian, petrological and geochemical studies of several wells were carried out in this work. Our data suggest that depositional environments were dominated by oxidizing bottom water conditions during the late Ediacaran, and evolved to anoxic conditions, triggered by blooms of microbial organisms in surface waters during the earliest Cambrian. Subsequently, massive release of H2S derived from both anaerobic recycling of organic matter and, probably, hydrothermal venting promoted a sulfidic ocean. The discovery of a Ni-Mo sulfide ore layer in the basal Cambrian implies that such a sulfidic condition spread onto the Yangtze carbonate platform interior during the late Cambrian Stage 2. Further, transgressive flooding led to widespread black shale deposition and persistently anoxic conditions, as indicated by geochemical proxies. During the late Ediacaran to earliest Cambrian, local and widespread phosphogenesis indicates that organic matter accumulation was intimately associated with microbial (especially cyanobacterial) blooms driven by phosphorus cycling. The organic matter accumulations in early Cambrian black shales, however, were in connection with anoxic bottom water conditions and intermittent replenishment of recycled organic phosphorus to surface waters. (C) 2016 Elsevier B.V. All rights reserved.

关键字：Black shale Ni-Mo sulfide ore Organic carbon isotopes Primary productivity South China

ISSN号：0031-0182

卷、期、页：卷: 450 页: 91-110

发表日期：2016-05-15

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,SCIE（科学引文索引网络版）

发表期刊名称：PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY

参与作者：贾承造,Young, Allison,汪泽成,王铜山

通讯作者：高平,张鹏伟,王大鹏

第一作者：柳广弟

论文类型：期刊论文

论文概要：高平,柳广弟,贾承造,Young, Allison,汪泽成,王铜山,张鹏伟,王大鹏，Redox variations and organic matter accumulation on the Yangtze carbonate platform during Late Ediacaran-Early Cambrian: Constraints from petrology and geochemistry，PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY，2016，卷: 450 页: 91-110

论文题目：Redox variations and organic matter accumulation on the Yangtze carbonate platform during Late Ediacaran-Early Cambrian: Constraints from petrology and geochemistry