Collaborative Research: Origin and Isotopic Signature of Neoproterozoic Post-Glacial Cap Carbonates, Australia

合作研究：澳大利亚新元古代冰后盖碳酸盐的起源和同位素特征

• 批准号: 9418294
• 负责人: Nicholas Christie-Blick
• 金额: $ 6.29万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-04-01 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418294&HistoricalAwards=false
• 关键词: Collaborative; Research; Origin; Isotopic; Signature

9418192 Derry An integrated stratigraphic, sedimentological and geochemical study of thin but laterally persistent "cap carbonate" rocks that overlie each of two main glacial units in the Neoproterozoic of Australia. The association of such carbonate rocks with glacial deposits in the Neoproterozoic is now recognized as a global phenomenon, and in many sections the glacial to post-glacial transition appears to contemporaneity. The widespread association of distinctive facies and pronounced 13C excursions that has been taken as evidence for contemporaneity. The widespread association of distinctive facies and pronounced 13C excursions argues for a genetic link, a link that has potentially major implications for biological evolution and environmental change in Neoproterozoic time, but which is not yet well understood.

9418192德里对澳大利亚新元古代两个主要冰川单元上覆的薄但横向持久的“盖层碳酸盐”岩石进行了地层学、沉积学和地球化学的综合研究。这种碳酸盐岩与新元古代冰川沉积的组合现在被认为是一种全球现象，在许多地区，冰川到冰后的过渡似乎是同时代的。独特的相和显著的13C漂移的广泛组合被认为是同时代的证据。独特的相和显著的13C漂移的广泛关联证明了遗传联系，这种联系对新元古代的生物进化和环境变化具有潜在的重大影响，但尚未被很好地理解。