Record of Meso-and Paleozoic environmental change and biotic evolution in calci-microbial sedimnent

钙质微生物沉积物中中古生代环境变化和生物进化记录

• 批准号: 13440149
• 负责人: SANO Hiroyoshi
• 金额: $ 9.79万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13440149/
• 关键词: calci-microbes; shallow-marine carbonates; paleoclimate; sea-level change; mass-extinction; metazoan reef-builders; シアノバクテリア; 炭酸塩堆積物; 進化; 大量絶滅; 炭酸塩アトラス; 古環境変動; 生物進化; 海山型石灰岩; 礁生態系; パンサラッサ海

Part of results of this research program have been published in relevant journals and presented at many conferences and meetings. Major results are summarized as follows ;1.Highly diverse calci-microbes, mainly of cyanobacteria, were recognized at many stratigraphic levels of shallow-marine carbonate units in Japan, but also in South China, western Canada, Ws confirmed their occurrence ranges in age from Silurian to Quaternary(Recent) through the field and microscopic examination.2.Calci-microbes were recognized in a wide range of shallow-marine carbonate facies, and occurs as significant sediment-producer in varied environments and sediment-stabilizer and -binder of reefal fades.3.Calci-microbes flourished especially in several geologic periods of decline and demise of metazoan reef-builders(e.g., Permo-Triassic boundary interval, Late Carboniferous prolonged and severe icehouse climate) and played a significant role as rock-forming biotas in these environment-devastated periods.4.Various types of calci-microbial reefal facies and related organo-sedimentary structures were reported from shallow-marine carbonate sediments of many geologic ages. These microbial sediments are considered as having built up small-scale topographic highs of reefa facies, along with submarine cements.Our results suggest that geochemical approaches needed in order to more thoroughly and quantitatively delineate temporal changes of environmental factors(temperatures, salinity, atmospheric CO_2 pressure, sea-level fluctuation, etc) in relation to flourish of calci-microbes. Some investigators of our research project have already begun hew researches with this aim.

本研究项目的部分成果已在相关期刊上发表，并在多个会议上发表。主要研究结果总结如下：1。在日本、华南、加拿大西部等地的浅海碳酸盐单元地层中均发现了种类繁多的钙微生物，主要以蓝藻菌为主，通过野外和显微检查，确定了它们的赋存年龄范围为志留系至第四纪（最近）。钙微生物广泛存在于浅海碳酸盐相中，在不同的环境中具有重要的产沙作用，是礁滩沉积的稳定剂和粘结剂。钙微生物的繁盛，特别是在几个地质时期的衰落和灭绝的后生礁建造者(如：在这些环境破坏时期，二叠-三叠纪界线期、晚石炭世漫长而严峻的冰窖气候)对造岩生物群起了重要作用。在不同地质年代的浅海碳酸盐沉积物中发现了不同类型的钙-微生物礁相及相关的有机沉积构造。这些微生物沉积物被认为与海底胶结物一起建立了珊瑚礁相的小规模地形高点。我们的研究结果表明，为了更全面和定量地描述与钙微生物繁殖期有关的环境因子（温度、盐度、大气co2压力、海平面波动等）的时间变化，需要地球化学方法。我们研究项目的一些研究人员已经为此目的开始了新的研究。

项目成果

Y.Ezaki, J.Liu, N.Adachi: "Earliest Triassic microbialite micro- to megastructures in the Huaying area of Sichuan Province, South China"PLAIOS. 18巻. 388-402 (2003)

Y.Ezaki，J.Liu，N.Adachi：“四川省华蓥地区最早的三叠纪微生物岩微巨型结构”PLAIOS Vol. 18. 388-402 (2003)

Wang, X.D., Sugiyaina, T.: "Permian coral faunas of the eastern Cimmerian Continent and their biogeographical implications"Jour. Asian Earth Sci.. 20. 589-597 (2002)

Wang, X.D., Sugiyaina, T.：“西梅里安大陆东部二叠纪珊瑚动物群及其生物地理意义”Jour。

Sano, Hiroyoshi: "Facies interpretation of Middle Carboniferous to Lower Permian Pope succession limestone of Cache Creek Group, Fort St. James, central British Columbia"Canadian Journal of Earth Science. 38. 535-550 (2001)

Sano, Hiroyoshi：“不列颠哥伦比亚省中部圣詹姆斯堡 Cache Creek 群中石炭纪到下二叠纪 Pope 演替石灰岩的相解释”《加拿大地球科学杂志》。

大清水岳史, 井龍康文: "沖縄本島勝連半島沖の島々に分布する琉球層群"地質学雑誌. 108. 318-335 (2002)

Takeshi Oshimizu，Yasufumi Iryu：“琉球群分布在冲绳本岛胜莲半岛附近的岛屿上”地质杂志 108. 318-335 (2002)。

Ezaki, Y., Liu, J.B., Adachi, N.: "Earliest Triassic Microbialite Micro-to Macrostructures in the Huaying Area of Sichuan Province, South China : Implications for the Nature of Oceanic Conditions after the End-Permian Extinction."Palaios. 18. 388-402 (200

Ezaki, Y., Liu, J.B., Adachi, N.：“华南四川省华蓥地区最早的三叠纪微生物岩微观到宏观结构：对二叠纪末灭绝后海洋条件性质的影响。”Palaios。