Carbonate deposition/dissolution and environmental changes through the earth histroy

地球历史上的碳酸盐沉积/溶解和环境变化

• 批准号: 05303001
• 负责人: MATSUMOTO Ryo
• 金额: $ 4.61万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05303001/
• 关键词: Carbonate rocks; Isotopic compositions; Sea level changes; Chemical weathering; Coral reef; Strontiumu isotopes; 微量元素; カルスト; 石灰洞; 生物礁; 酸素同位体組成; トロマイト; 大気二酸化炭素

1.Research ActivitiesNumber of research meetings and seminars were held to stimulate discussions and exchange of information. Paperd read at these meetings have been published as an annual report or abstract volums. We also established a data-base for carbonate study(CADBA), which includes approximately 180,000 articles.2.Highlights of the ProjectWe revealed that the carbon isotopic composition of carbonates shows strong netagive anomly just below the Precambrian/Cambrian boundary, and strong positive anomaly just above the boundary. This implies that the shallow sea water was enriched in organic carbon derived carbonate species just before the boundary. Based on the strontiumu isotope stratigraphy, dolomitization of the Miocene reefal limestonewas found to have been occurred by the mixing of sea-water and meteoric waters during the period of low sea levels.We have suggested the possibility that ooids might have been formed under strong influence of bacterial activity(bacterial induced carbonates), based on the electron microscope observations.3.Impact of the projectSeveral cooperative research projects have been initiated and stimulated through the descussion and cooperation at the meetings. This project has made clearl that the elucidation of a vital effects in biomineralization and disequibrium precipitation of inorganic carbonates are crucial for the fuller understanding of carbonate precipitation and dissolution.

1.进行研究会议和研讨会的研究活动，以刺激讨论和信息交流。在这些会议上阅读Paperd已作为年度报告或摘要卷发表。我们还建立了一个用于碳酸盐研究（CADBA）的数据库，其中包括约180,000篇文章。2。Projectwe的高光显示，碳酸盐的碳同位素组成显示出强烈的网络质量，在前寒武纪/寒武纪的下方和强阳性静脉差异下在边界上方。这意味着在边界之前的有机碳衍生的碳酸盐物种富集了浅海。基于额叶同位素地层学，中新世礁石灰岩的白云岩已被发现是由于海水和陨石水平的混合而发生的。基于电子显微镜观测值的细菌活性（细菌诱导的碳酸盐）。3.ProjectSeveral合作研究项目的影响是通过会议上的下降与合作启动和刺激的。该项目已经清楚地表明，阐明无机碳酸盐生物矿化和不等降水的重要作用对于对碳酸盐沉淀和溶解的充分理解至关重要。

项目成果

Yamamoto,S.: "Accreted Mesozoic pelagic seamount in Chirai quarry Hokkaido,Japan" Paleo geography,paleoclimatology paleo ecology. 105. 125-137 (1993)

Yamamoto,S.：“日本北海道 Chirai 采石场增生的中生代远洋海山”古地理学、古气候学、古生态学。

狩野 彰宏,吉田 靖: "秋吉帯石灰岩の不連続的堆積" 地質学雑誌. 100. 731-742 (1994)

Akihiro Kano，Yasushi Yoshida：“Akiyoshi 带石灰岩的不连续沉积”地质杂志 100. 731-742 (1994)。

Yoshimura, Kazuhisa: "Role of carbonate dissolution in CO2-cylce." Chikyuu-Kagaku(Geochemistry). 27. 21-28 (1993)

Yoshimura、Kazuhisa：“碳酸盐溶解在 CO2 循环中的作用。”

茅根 創: "後氷期のサンゴ礁への炭酸カルシウム堆積速度" 地球化学. 27. 37-42 (1993)

Hajime Kayane：“冰期后珊瑚礁上的碳酸钙沉积率”地球化学 27. 37-42 (1993)。

吉村和久: "CO_2循環における炭酸塩溶解の役割" 地球化学. 27. 21-28 (1993)

Kazuhisa Yoshimura：“碳酸盐溶解在 CO_2 循环中的作用”地球化学 27. 21-28 (1993)。