In Search of the Primeval Oceanic Crust: Biostratigraphic, Chronostratigraphic, Paleogeographic Studies Pertaining to the Origin and Age of the Antillean Island Arc System.......

寻找原始洋壳：与安的列斯岛弧系统的起源和年龄有关的生物地层学、年代地层学、古地理研究......

• 批准号: 9117397
• 负责人: Emile Pessagno
• 金额: $ 12.56万
• 依托单位: University of Texas at Dallas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-15 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117397&HistoricalAwards=false
• 关键词: Search; Primeval; Oceanic; Crust; Biostratigraphic

In plate tectonic reconstructions the Caribbean Plate (area of present-day Caribbean Sea and West Indies) is assumed to have originated in the Pacific and was, in fact, a part of the Pacific Farallon Plate during Mesozoic times. We plan to examine ophiolite masses (remnants of oceanic crust) to determine the genesis and age of the Caribbean Plate. Clues to the origin and actual oldest age of the Caribbean Plate can be found by examining microfossils (Radiolaria) occurring in cherts within ophiolite remnants in the West Indies. It is conceivable that remnants of older ophiolite complexes are present that pre-date the formation of the Atlantic and the Gulf of Mexico and that contain a radiolarian assemblage having a unique paleolatitudinal imprint.

在板块构造重建中，加勒比板块（ 今天的加勒比海和西印度群岛）被认为有 起源于太平洋，实际上是太平洋的一部分， 中生代时期的法拉隆板块。 我们计划检查蛇绿岩 质量（海洋地壳的残余），以确定成因和年龄 加勒比板块 关于起源和实际年龄的线索 可以通过研究微体化石 （放射虫）产于 西印度群岛 可以想象，更古老的蛇绿岩 在大西洋形成之前就存在着复合体 和墨西哥湾，并含有放射虫组合 具有独特的古纬度印记。