Metasomatism of magmatic and metamorphic rocks of the Wawa-Abitibi and Western Wabigoon Subprovinces and Kapuskasing structure, Superior Province, Canada: Implications for Neoarchean continent evolution and gold deposition

加拿大苏必利尔省瓦瓦-阿比蒂比省和西瓦比贡省的岩浆和变质岩的交代作用以及卡普斯卡辛构造：对新太古代大陆演化和金沉积的影响

• 批准号: RGPIN-2016-04417
• 负责人: Nadeau, Olivier
• 金额: $ 1.68万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679325
• 关键词: Metasomatism; magmatic; metamorphic; rocks; Wawa

Metasomatism, or the chemical transformation of rocks by interaction with fluids, has recently been getting more attention from the scientific community, as more Earth scientists realize it is an important process which has been involved in the genesis of the Earth's crust as well as in the formation of ore deposits, since at least 4 billion years ago. Although metasomatism has been recognized in all rock types, and is instrumental for the genesis of certain types of metal deposits, it remains poorly understood. For example, while the effects of metamorphism and magmatism during the construction of the Canadian Shield have been studied in detail, the effect of metasomatism on the evolution of these rocks was never fully assessed. Here, I propose to study the metasomatism associated with the magmatic evolution of certain parts of the Canadian Shield in Ontario and Quebec, within the Wawa-Abitibi terrane, the Wabigoon terrane, and the Kapuskasing structure.*******Gaining a better understanding of the effect of metasomatism during the assembly of the Canadian Shield is of primary importance for our comprehension of the formation and evolution of the Earth's crust, and for our understanding of the genesis of the important gold deposits it hosts. The new knowledge and insight that will result from this research will be important to Earth scientists in general, and more specifically to geologists, who try to understand how continents form and explore metallic deposits; to physical geographers who integrate geological information into maps for the public;, to petrologists who study how rocks form and teach it in high school, college and university; and to structural geologists and geophysicists who are interested in how oceanic crusts are being subducted underneath continents and in how continents collide to edify mountain ranges. In short, this research will allow us to better understand how the Canadian Shield formed, and ultimately how continents are built.*******This research will also benefit the mining industry and the Canadian economy. A significant part of this research will be dedicated to improving our understanding of the formation of the gold deposits which are so important to our economy and to the regional workforce. The new exploration tools that will be developed here will help vector the exploration industry toward new gold deposits, which will stimulate the economy and create new jobs for Canadians. Finally, this research program will provide invaluable training opportunities for HQP and prepare them for jobs in the academic, government and geology industry.******

交代作用，即岩石与流体相互作用所发生的化学变化，最近受到了科学界的更多关注，因为越来越多的地球科学家意识到，交代作用是一个重要的过程，至少从 40 亿年前开始，它就参与了地壳的形成以及矿床的形成。尽管交代作用已在所有岩石类型中得到认可，并且有助于某些类型金属矿床的形成，但人们对它仍然知之甚少。例如，虽然对加拿大地盾建造过程中变质作用和岩浆作用的影响进行了详细研究，但交代作用对这些岩石演化的影响从未得到充分评估。在这里，我建议研究与加拿大地盾位于安大略省和魁北克省的某些部分的岩浆演化相关的交代作用，这些部分位于 Wawa-Abitibi 地体、Wabigoon 地体和 Kapuskasing 构造内。********更好地了解加拿大地盾组装过程中交代作用的影响对于我们理解地球的形成和演化至关重要。 地壳，以及我们了解其重要金矿床的成因。这项研究产生的新知识和见解对于地球科学家来说非常重要，更具体地说，对于试图了解大陆形成和探索金属矿床的地质学家来说非常重要。将地质信息整合到公共地图中的自然地理学家；研究岩石如何形成并在高中、学院和大学教授岩石的岩石学家；以及对海洋地壳如何俯冲到大陆下方以及大陆如何碰撞形成山脉感兴趣的结构地质学家和地球物理学家。简而言之，这项研究将使我们更好地了解加拿大地盾是如何形成的，以及最终大陆是如何形成的。********这项研究还将有利于采矿业和加拿大经济。这项研究的一个重要部分将致力于提高我们对金矿形成的了解，这对我们的经济和地区劳动力非常重要。这里将开发的新勘探工具将有助于将勘探行业引向新的金矿，这将刺激经济并为加拿大人创造新的就业机会。最后，该研究计划将为 HQP 提供宝贵的培训机会，并为他们在学术、政府和地质行业的工作做好准备。******