Timing and Nature of Terrane Accretion in the Northern Appalachians: A Multidisciplinary Approach

北阿巴拉契亚山脉地体增生的时间和性质：多学科方法

• 批准号: 8706963
• 负责人: Allan Ludman
• 金额: $ 6万
• 依托单位: CUNY Queens College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1990-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8706963&HistoricalAwards=false
• 关键词: Timing; Nature; Terrane; Accretion; Northern

Eastern Maine is composed of large fault-bounded lithotectonic blocks, some of which may be exotic terranes with respect to North America, however neither the allochthoneity nor age of accretion of these blocks has been firmly established. The principal goals of this project are to compare two pre-Silurian tracts (St. Croix and Miramichi) now separated by faults and Siluro-Devonian cover, to establish whether they are exotic or were formed in the same ocean basin, and to study a possible terrane-separating fault to establish timing of accretion. Results will be applicable in reevaluation of the Paleozoic tectonics of northern New England.

缅因州东部由大型断裂带岩石构造块体组成，其中一些可能是北美的奇异地体，但这些块体的同源作用和吸积年龄都没有确定下来。该项目的主要目标是比较现在被断层和志留纪-泥盆纪盖层隔开的两个前志留纪地区(圣克罗伊和米拉米奇)，确定它们是外来的还是形成于同一洋盆，并研究可能的地体分离断层以确定增长的时间。这些结果将适用于新英格兰北部古生代构造的重新评价。