DOI: 10.1016/j.palaeo.2014.12.015
论文题名: Microbial community from the Lower Permian (Artinskian-Kungurian) paleoclimatic transition, mid-Panthalassan Akiyoshi atoll, Japan
作者: Nakazawa T. ; Ueno K. ; Nonomura N. ; Fujikawa M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 420 起始页码: 116
结束页码: 127
语种: 英语
英文关键词: Akiyoshi atoll
; Early Permian
; Microbialite
; Mid-Panthalassa
; Oncoid
; Reef community
英文摘要: Large oncoids (up to 14. cm) and microbialites are abundant in the Artinskian (Lower Permian) section of mid-Panthalassan Akiyoshi atoll carbonates. The oncoids and microbialites consist mainly of a tubular microproblematicum, girvanellid cyanobacterial filaments, microbial micrite crusts, and pore-filling sparry calcite cements. They are surrounded by intraclastic-bioclastic grainstone/rudstone, indicative of moderate- to slightly high-energy subtidal conditions. The microbial community was the primary boundstone-forming organisms on the Akiyoshi atoll during this time. It represents a transitional stage in a mid-Panthalassan reef succession between a cooler-water autotrophic Palaeoaplysina-microencruster community in the Gzhelian-Asselian and a warmer-water heterotrophic calcareous sponge-microencruster community in the Middle Permian. The flourishing mid-Panthalassan microbial community during the late Early Permian is related to enhanced alkalinity, increasing nutrient levels, elevated sea-surface temperatures, and the absence of major reef-building metazoans, which resulted from Gondwanan deglaciation, climatic changes, and a pulse of active volcanism. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69032
Appears in Collections: 过去全球变化的重建
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作者单位: Geological Survey of Japan, AIST, 1-1-1 Higashi, Tsukuba, Japan; Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka, Japan; Akiyoshi-dai Museum of Natural History, Shuho-cho, Mine, Japan
Recommended Citation:
Nakazawa T.,Ueno K.,Nonomura N.,et al. Microbial community from the Lower Permian (Artinskian-Kungurian) paleoclimatic transition, mid-Panthalassan Akiyoshi atoll, Japan[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,420