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：量化新元古代全球变化的速率，埃塞俄比亚作者：Adam Maloof，普林斯顿大学，EAR-1323158Nicholas Swanson-Hysell，大学。加利福尼亚州伯克利，EAR-1325230摘要虽然新元古代早期存在碳和锶同位素、磁性地层和古生物学记录，并且是世界各地地层剖面关联的主要基础，但辐射校准是有限的。大多数非常适合开发化学地层数据的碳酸盐台地都是在远离火山爆发活动的被动边缘开发的，火山活动可能会将富含锆石的火山灰输送到盆地。埃塞俄比亚北部的坦比恩群是解决这一问题的理想选择，因为它是沉积在靠近活火山活动的弧后盆地中的厚层碳酸盐岩层序。我们将开发来自埃塞俄比亚北部坦比恩群的综合化学地层学、古地磁学和 U-Pb 年代学数据，为成冰期冰川作用之前 1 亿年（约 820-720 Ma）的地层对比提供新的支柱。我们的首要目标是了解潜在独特的地球化学和古地理边界条件是如何以及何时形成的，从而允许在成冰期开始时发生全球冰川作用。该资助由国际科学与工程部联合资助。