COLLABORATIVE RESEARCH: Chemical Fingerprinting of Ash Beds in the Terminal Proterozoic Nama Group of Namibia

合作研究：纳米比亚元古界末期纳马群灰层的化学指纹图谱

• 批准号: 0073834
• 负责人: Warren Huff
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073834&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Chemical; Fingerprinting; Ash

Collaborative research: Chemical Fingerprinting of Ash Beds in the Terminal Proterozoic Nama Group, NamibiaBeverly Saylor.0073700Warren Huff.0073834The terminal Proterozoic to Cambrian Nama Group of Namibia is one of the most comprehensive records of end Proterozoic events. The Schwarzrand Subgroup of the Nama Group contains 15 stratigraphically distinct volcanic ash beds, which are constrained by U-Pb geochronology to a time span of at most 6 m.y. These event beds have tremendous chronostratigraphic value as high-resolution, widespread, time-parallel layers. This feasibility study will evaluate the potential for using geochemical fingerprinting techniques to uniquely identify and correlate ash beds in the Schwarzrand Suybgroup. Correlations of some widespread ash beds are already well established based on the physical stratigraphy. Whole rock and fluid inclusion studies of samples from these beds will control for within bed variability of chemical signature. Three widely separated, complete sections of the Schwarzrand Subgroup preserve nearly all the ash beds in replicate. Comprehensive analyses of ash bed samples from these sections ill compare between bed vs. within bed compositional differences and will test the resolution of the fingerprinting method.

合作研究：纳米比亚末元古代Nama群火山灰层的化学指纹.Beverly Saylor.0073700Warren Huff.0073834纳米比亚末元古代至寒武纪Nama群是关于末元古代事件最全面的记录之一。Nama群Schwarzrand亚群包含15个不同的火山灰层，受U-Pb年代学的约束，其时间跨度最多为6 m.y。这些事件层作为高分辨率、分布广泛、时间平行的地层，具有巨大的年代地层学价值。这项可行性研究将评估使用地球化学指纹技术唯一识别和对比Schwarzrand SuMo组火山灰层的潜力。一些广泛分布的火山灰层的对比已经建立在物理地层学的基础上。对这些岩层样品的全岩和流体包裹体研究将控制层内化学特征的可变性。Schwarzrand亚群的三个相隔很远的完整部分保存了几乎所有的火山灰床。从这些区段采集的灰床样本的综合分析将比较床层之间和床层内的成分差异，并将测试指纹方法的分辨率。