COLLABORATIVE RESEARCH: Neoproterozoic-Lower Paleozoic Evolution of the Southeastern New England Avalon Zone aroundBoston, MA: Tests from Geochronology and Paleomagnetism

合作研究：马萨诸塞州波士顿周围新英格兰东南部阿瓦隆带的新元古代-下古生界演化：地质年代学和古地磁学测试

• 批准号: 9725804
• 负责人: Margaret Thompson
• 金额: $ 4.61万
• 依托单位: Wellesley College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725804&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Neoproterozoic; Lower; Paleozoic

9725804 Thompson Avalon is a composite terrane that formed along the margin of Gondwana and crossed the ancient ocean Iapetus to collide with Laurentia by mid-Paleozoic time, thus is an important element in global plate reconstruction subsequently, fragments of Avalon drifted during younger orogenics and now present on both sides of the Atlantic. Along the east coast of North America, fragments of Avalon occur in Newfoundland, Nova Scotia, New Brunswick, southeastern New England in the coastal mid-Atlantic states. In order to accurately re-position these fragments to reconstruct the original composite terrane age and spatial information from each is required. This project will gather age and paleomagnetically determined paleopole data for Avalon in the Boston Basin portion of the Southwestern New England Avalon Zone. Results when combined with similar data from other Avalon terranes, will allow reconstructions for the original terrane or superterrane and illuminate its relationship to the Gondwana supercontinent.

9725804 Thompson Avalon是一个复合地体，形成于冈瓦纳大陆边缘，并在古生代中期穿过古海洋土卫八与劳伦大陆相撞，因此是全球板块重建的重要元素，随后，阿瓦隆碎片在较年轻的造山运动中漂流，目前存在于大西洋两岸。 沿着北美东海岸，阿瓦隆的碎片出现在大西洋中部沿海各州的纽芬兰、新斯科舍、新不伦瑞克、新英格兰东南部。 为了准确地重新定位这些碎片以重建原始的复合地体，需要每个碎片的年龄和空间信息。 该项目将为新英格兰西南部阿瓦隆区波士顿盆地部分的阿瓦隆收集年龄和古地磁确定的古极数据。 结果与其他阿瓦隆地体的类似数据相结合，将能够重建原始地体或超级地体，并阐明其与冈瓦纳超大陆的关系。