An Integrated Study of the Earth's Environmental and Metallogenic Histories

地球环境和成矿历史的综合研究

• 批准号: 12440144
• 负责人: KAJIWARA Yoshimichi
• 金额: $ 8.32万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12440144/
• 关键词: sulfur isotopes; metallogenesis; paleoenvironment; oceanic anoxic event; mass extinctions; structurally substituted sulfate; isotope stratigraphy; biogenic carbonate; 生物大量絶滅境界; 海洋無酸素事変(OAE); 炭酸塩構造置換態硫酸; 硫黄同位体; 地球化学; 古環境論; 大量絶滅; 構造置換態硫酸; 同位

An integrated systematic study has been carried out on the earth's environmental and metallogenic histories, in the hope of verifying and further developing the author's original working-hypothesis linking derivation of both the syngenetic Kuroko-type heavy metal deposits and the crude oil deposits in the Miocene Green Tuff region of Japan to a common sedimentary organic source material named PUMOS presumably accumulated in association with an intense oceanic anoxia in the back-arc basin of paleo-Japan Sea. Present intensive sulfur isotope studies on some major biological mass extinction boundaries (PC/C, F/F, G/L, P/T, C/T and K/T) and also on some major time-restricted strataboud-type syngenetic mineralizations (Kieslager cupriferous pyritic deposits, bedded manganese deposits, and Kuroko-type massive sulfide deposits) from various localities in the world have revealed that these biological and metallogenetic events almost always concur with, or sometimes predate and/or postdate, the … More occurrence of intense oceanic anoxia throughout the geologic history This finding would provide evidence for the larger-than-expected intimate genetic relationship of the earth's environmental evolution to the economically important heavy metal mineralizations as well as hydrocarbon resource formation. Another important result is a fundamental contribution to the sulfur isotope stratigraphy. A number of analyses for the SSS (structurally substituted sulfate) of modern biogeic carbonate shells and skeletons (mollusks, brachiopods, urchins and corals) have yielded isotopic compositions similar to the average values of ambient dissolved seawater sulfates. This would provide sound evidence that the biogenic SSS in the geologic record can be utilized as a good proxy for the isotopic composition of ancient coeval seawater sulfate. Applying the SSS-based isotope stratigraphy to limestone sections (Cambro-Ordovician, Devonian, Carboniferous, Permo-Triassic, Cretaceous) from various localities in Asia and Europe, additional information has been successfully obtained to make up for the higher-order oceanic isotope evolution and the marine redox environmental change during the Phanerozoic time Less

对地球环境史和成矿史进行了综合系统的研究，为了验证和进一步发展笔者最初提出的将日本中新世绿凝灰岩地区同生黑古古型重金属矿床和原油矿床与一种称为PUMOS的共同沉积有机物质相联系的工作假设，该物质可能与古日本海弧后盆地强烈的海洋缺氧有关。目前，对世界各地主要的生物大灭绝边界（PC/C、F/F、G/L、P/T、C/T和K/T）以及主要的具有时间限制的层状同生成矿作用（Kieslager铜黄铁矿、层状锰矿、kuroko型块状硫化物矿床）进行了大量的硫同位素研究，结果表明，这些生物和成矿事件几乎总是同时发生，有时早于或晚于。这一发现将为地球环境演化与具有重要经济意义的重金属矿化和油气资源形成的密切成因关系提供超出预期的证据。另一个重要的结果是对硫同位素地层学的基础性贡献。对现代生物碳酸盐壳和骨骼（软体动物、腕足动物、海胆和珊瑚）的SSS（结构取代硫酸盐）进行了大量分析，得出的同位素组成与环境溶解海水硫酸盐的平均值相似。这将为地质记录中的生物成因SSS可以作为古同时期海水硫酸盐同位素组成的良好代表提供有力证据。通过对亚洲和欧洲不同地区（寒武—奥陶系、泥盆纪、石炭系、二叠纪—三叠纪、白垩纪）石灰岩剖面的sss同位素地层学研究，成功地获得了更多的信息，弥补了显生宙时期海洋高阶同位素演化和海洋氧化还原环境的变化

项目成果

Kajiwara, Y.: "Isotopic compositions of trace sulfate and sulfiole in a lower Bashkirian coralline carbonate clast from Japan"Annual Report, Institute of Geoscience, University of Tsukuba. 29. 31-35 (2003)

Kajiwara, Y.：“日本下巴什基里安珊瑚碳酸盐碎屑中微量硫酸盐和硫硫醇的同位素组成”年度报告，筑波大学地球科学研究所。

Espi, J.: "Paragenesis of Alferation,Ore and Gangue Minerals at Nena High-Sulfidation Cu-Au Deposit,Frieda River,PNG"Proceedings of International Symposium on Gold and Hydrothermal Systems. 19-24 (2001)

Espi, J.：“巴布亚新几内亚弗里达河内纳高硫化铜金矿床的烧蚀、矿石和脉石矿物的共生”金与热液系统国际研讨会论文集。

Nishimura, Y: "Sulfur isotope fractionation of carbonate structurally substituted sulfate in modern marine mollusk shells"Annual Report, Institute of Geoscience, University of Tsukuba. 26. 37-40 (2000)

Nishimura, Y：“现代海洋软体动物壳中碳酸盐结构取代的硫酸盐的硫同位素分馏”年度报告，筑波大学地球科学研究所。

Eguchi, A.: "Sulfur content and isotopic ratio of modern coral skeletons from the Pacific coast of Shikoku, Japan"Annual Report, Institute of Geoscience, University of Tsukuba. 29. 27-30 (2003)

Eguchi, A.：“日本四国太平洋沿岸现代珊瑚骨骼的硫含量和同位素比”年度报告，筑波大学地球科学研究所。

Komuro, K.: "Trace fossils and sulfur isotopes in mudstones around the Kuroko deposits in the Hokuroku basin, NE Japan"Resource Geology. in press. (2004)

Komuro, K.：“日本东北部北鹿盆地黑子矿床周围泥岩中的痕量化石和硫同位素”资源地质学。