Autochthonous construction of archean greenstone belts

太古代绿岩带的本土构造

• 批准号: 238659-2006
• 负责人: Thurston, Phillips
• 金额: $ 1.54万
• 依托单位: Laurentian University of Sudbury
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=365635
• 关键词: Autochthonous; construction; archean; greenstone; belts

The research Project will examine how the 2.5 billion year old Precambrian volcanic rocks in the Canadian Shield vary with time and the causes of that variation. The research will attempt to demonstrate that some of the variation is due to cyclical mountain-building events and some of the variation is due to the rise and fall of sea level. This research will examine ancient volcanic rocks in the Abitibi area of the Canadian Shield, in northwestern Ontario and in the Precambrian shield of Australia and Greenland. The work will also produce the first 3 dimensional computer-generated model of the Abitibi greenstone belt, a zone of Precambrian volcanic rocks extending from Timmins and Kirkland Lake through to Chibougamau in Quebec. The 3D model will help to make the exploration for copper and zince deposits more effective and efficient by predicting the extent of units beneath the cover of glacial deposits and younger sedimentary rocks. This project will be the first study to demonstrate that major units of Greenstone belts, including those with copper-zinc mineral deposits can be traced and correlated over large distances and in the third dimension. The impact of the work on exploration for new mineral deposits will be substantial in that it should increase the success in finding new deposits and thus supporting the northern economy.

该研究项目将研究加拿大地盾中25亿年前寒武纪火山岩如何随时间变化以及这种变化的原因。这项研究将试图证明，一些变化是由于周期性的造山活动，一些变化是由于海平面的上升和下降。这项研究将考察加拿大地盾阿比蒂比地区、安大略西北部以及澳大利亚和格陵兰前寒武纪地盾的古火山岩。这项工作还将产生阿比蒂比绿岩带的第一个三维计算机生成模型，这是一个从蒂明斯和柯克兰湖延伸到魁北克的奇布加毛的前寒武纪火山岩带。3D模型将有助于通过预测冰川沉积物和较年轻沉积岩覆盖下的单元范围，使铜和锌矿床的勘探更加有效和高效。这一项目将是第一项研究，证明可以在第三维空间中进行远距离追踪和关联绿石带的主要单位，包括那些有铜锌矿床的单位。这项工作对勘探新矿藏的影响将是巨大的，因为它将增加发现新矿藏的成功率，从而支持北方的经济。