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Collaborative Research: Quantifying rates of Neoproterozoic global change, Ethiopia

合作研究：量化新元古代全球变化率，埃塞俄比亚

基本信息

批准号：
1325230
负责人：
Nicholas Swanson-Hysell
金额：
$ 15.24万
依托单位：
University of California-Berkeley
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-01-01 至 2017-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1325230&HistoricalAwards=false
关键词：
Collaborative Research Quantifying rates Neoproterozoic

项目摘要

Collaborative Research: Quantifying Rates of Neoproterozoic Global Change, EthiopiaByAdam Maloof, Princeton University, EAR-1323158Nicholas Swanson-Hysell, Univ. California, Berkeley, EAR-1325230ABSTRACTWhile carbon and strontium isotope, magnetostratigraphic, and paleontological records exist for the early Neoproterozoic Era, and are the primary bases for correlation of stratigraphic sections around the world, radiometric calibration is limited. Most carbonate platforms well-suited for the development of chemostratigraphic data are developed on passive margins far from explosive volcanic activity that might deliver zircon-rich ash to the basin. The Tambien Group of northern Ethiopia is ideal for solving this problem because it is a thick carbonate-containing succession deposited in a back-arc basin proximal to active volcanism. We will develop integrated chemostratigraphic, paleomagnetic and U-Pb geochronological data from the Tambien Group of northern Ethiopia to provide a new backbone for stratigraphic correlation in the 100 million years preceding Cryogenian glaciation (~820-720 Ma). Our overarching goal is to understand how and when potentially unique geochemical and paleogeographic boundary conditions were developed that allowed for global glaciation at the onset of the Cryogenian Period. This grant was jointly supported by the International Science and Engineering Division.

合作研究：新元古代全球变化的定量速率，哥伦比亚普林斯顿大学Adam Maloof，1323158尼古拉斯·斯旺森-海塞尔，加州大学伯克利分校，1325230摘要虽然新元古代早期的碳和锶同位素、磁性地层学和古生物学记录存在，并且是世界各地地层剖面对比的主要基础，但放射性校准是有限的。大多数碳酸盐岩台地非常适合于开发化学地层学数据，它们都是在被动边缘开发的，远离可能向盆地输送富含锆石的火山灰的爆发性火山活动。埃塞俄比亚北方的坦比恩群是解决这一问题的理想场所，因为它是一个厚的含碳酸盐岩的层序，沉积在靠近活火山作用的弧后盆地中。我们将开发综合的化学地层，古地磁和U-Pb年代学数据从埃塞俄比亚北方坦比恩群提供一个新的骨干地层对比在1亿年前的低温冰期（~820-720 Ma）。我们的首要目标是了解如何以及何时开发了潜在的独特的地球化学和古地理边界条件，允许在低温期开始全球冰川作用。这笔赠款是由国际科学和工程司共同支助的。