Single-Grain Zircon Pb/Pb Ages by Direct Evaporation: A Pilot Study of Detrital Zircons in the New England Appalachians

单晶锆石 Pb/Pb 直接蒸发年龄：新英格兰阿巴拉契亚山脉碎屑锆石的初步研究

• 批准号: 9018850
• 负责人: L. Peter Gromet
• 金额: $ 4.65万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018850&HistoricalAwards=false
• 关键词: Single; Grain; Zircon; Pb; Ages

This New England Appalachians are composed of several tectonic blocks whose relationships to one another are relatively unknown or poorly constrained. Existing models indicate origins are diverse and spatially separate, so detrital zircons in sedimentary assemblages may be distinctive. This project will apply a recently developed direct 11 evaporation mass spectrometric technique for single zircon grains to several of the tectonic blocks to characterize the age of continental and/or volcanic-arc sources of the sediments included in each terrane. Results will evaluate the utility of this technique in testing the various models that have specified the relative locations of blocks through the Paleozoic evolution of the Appalachians.

新英格兰阿巴拉契亚山脉由几个构造块组成，这些构造块之间的关系相对未知或缺乏约束。 现有模型表明起源是多样的并且在空间上是分离的，因此沉积组合中的碎屑锆石可能是独特的。 该项目将应用最近开发的针对单个锆石颗粒的直接 11 蒸发质谱技术到几个构造块，以表征每个地体中沉积物的大陆和/或火山弧来源的年龄。 结果将评估该技术在测试各种模型中的实用性，这些模型通过阿巴拉契亚古生代演化指定了区块的相对位置。