Plankton from Early Cambrian black shale series on the Yangtze Platform, and its influences on lithologies

作     者：Andreas BRAUN 1* and CHEN Junyuan 2(1. Institute of Paleontology, University of Bonn, Nussallee 8, D 53115 Bonn, Germany 2. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China) 

作者机构：Institute of Paleontology University of Bonn Nussallee 8 D-53115 Bonn Germany Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2003年第10期

页      面：57-62页

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina(GrantNo.40132010)andtheDeutscheForschungsgemeinschaft(DFG) 

主　　题：Black shale Cambrian Plankton Yangtze Platform China. 

摘      要：Black shales, cherts, and associated lithologies in the Early Cambrian of the Yangtze Platform yielded abundant phytoplankton, the earliest well preserved skeletons of zooplankton (radiolarians) and abundant phosphatic ovoid bodies, probably representing fecal pellets, produced by Mesozooplankton grazing on phytoplankton. The oceanic food chain in surface waters is therefore considered to be more complete than known up to now with respect to primary and secondary consumers in the Early Cambrian plankton ecosystem. On the basis of primary sedimentary compositions preserved in phosphorite concretions and chert layers it is shown that biosiliceous sedimentation mixed with organic substance played a significant role within the black shale sequence of the Hetang and Niutitang formations. The resulting lithology corresponds closely in character to the bituminous Alum shale and Lydite sequences of Lower Silurian (Llandoverian) age along northern Gondwana (e.g. Thuringia, Bohemia).