Terreneuvian small shelly faunas of East Yunnan (South China) and their biostratigraphic implications
Terreneuvian small shelly faunas of East Yunnan (South China) and their biostratigraphic implications
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DOI：
10.1016/j.palaeo.2013.07.003
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Ben Yang;M. Steiner;Guoxiang Li;H. Keupp
中科院分区：
文献类型：
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作者：
Ben Yang;M. Steiner;Guoxiang Li;H. Keupp
讨论了滇东(梅树村、先锋和会泽地区)陆相小壳化石(SSF)组合的详细组成。所描述的剖面代表了扬子地台的浅水沉积，其中包括许多地层沉积。已报道的SSF组合可归属于区域SSF生物带I-III(Anabarites trisulcatus-Protohertzina anabarica集合带；Paragloborilus sublobosus-Purella Squamulosa集合带；Watsonella cross by i集合带)。根据新数据略微重新定义了II区和III区。在此提出了第二带的两个亚带，即：Annelitellus yangtzzens-Obtusoconus honorablis亚带和Maikhanella cambriana-Oelandiella korobkovi亚带，Claviconchella qanyiigen。ET sp.11月和Bubiites Simpleexgen。ET sp.11月都被报道过。在这里，我们还为著名的梅树村部分提供了SSF分发的关键修订。滇东地区的对比方案记录了地层分层的范围和持续时间。SSFS的分布和岩性特征表明，碳酸盐岩台地暴露导致沉积破裂和可能的岩溶作用的三大事件。这促使人们对以前描述的浅层台地地层的稳定同位素地层学进行了新的思考。考虑到陆相地史的复杂性和地貌的独特性，地体地貌的研究需要将沉积学、地球化学学和古生物学相结合。
The study discusses the detailed composition of Terreneuvian small shelly fossil (SSF) assemblages of eastern Yunnan Province (Meishucun, Xianfeng and Huize regions). The described sections represent shallow water deposits of the Yangtze Platform that include a number of stratigraphical hiati. The reported SSF assemblages can be assigned to the regional SSF biozones I–III (Anabarites trisulcatus–Protohertzina anabaricaAssemblage Zone;Paragloborilus subglobosus–Purella squamulosaAssemblage Zone;Watsonella crosbyiAssemblage Zone). Zones II and III are slightly redefined based on new data. Two subzones of Zone II are proposed here, namely,Annelitellus yangtzensis–Obtusoconus honorabilisSubzone andMaikhanella cambriana–Oelandiella korobkoviSubzone.Claviconchella qianyiigen. et sp. nov. andBubiites simplexgen. et sp. nov. are reported. Here we also provide a critical revision of the SSF distribution for the well-known Meishucun section. The correlation scheme for East Yunnan documents the extent and duration of stratigraphical hiati. The distribution of SSFs and the lithological characterization indicate three major events of exposure of the carbonate platform resulting in sedimentary breaks and possible karstification. This prompts new consideration of the previously described stable isotope stratigraphy of shallow platform strata. Considering the complexity of the Terreneuvian Earth history as well as the uniqueness of SSF, an integration of sedimentology, geochemistry and paleontology is needed for future SSF study.