Tectonics and metallogeny of continental margins

大陆边缘构造与成矿

• 批准号: 183651-2008
• 负责人: Mortensen, James(Jim)
• 金额: $ 2.91万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=392164
• 关键词: Tectonics; metallogeny; continental; margins

My research focuses on the interplay between tectonism and the formation of mineral deposits along the active margins of continents. Continental margins are geological complex, and are commonly the locus of a wide variety of tectonic processes, including the subduction of oceanic crust and resulting development of volcanic/plutonic arcs, such as those in the South American Andes, as well as collision of arcs or microcontinents with the main continental margin, and/or episodic extensional (rifting) events. Formation of base and precious metal mineral deposits in such settings is also very complex; however, a better understanding of the nature and controls on formation of deposits in these settings will greatly enhance our ability to explore for and find new mineral resources. I am investigating a variety of styles of continental margins and associated mineral deposits, including continental ("Andean-type") magmatic arcs, relatively juvenile arc settings that formed immediately adjacent to the edges of continents, and "orogenic" gold deposits formed in both post-collisional settings, and within accretionary prisms during subduction of spreading ridges. I am carrying out parallel studies of each of these settings in the Canadian Cordillera of BC and Yukon and in other, similar settings in Mexico, New Zealand and Australia. The goal of this research is to develop new insights into the nature of tectonism and formation of mineral deposits in continental margin settings from international studies and then apply that new knowledge to better understanding the tectonic evolution of the Canadian Cordillera and the processes that led to formation of mineral deposits.

我的研究重点是构造运动和沿着大陆活动边缘的矿床形成之间的相互作用。 大陆边地质复杂，通常是各种构造过程的发生地，包括洋壳的俯冲和由此产生的火山/深成弧的发展，如南美洲安第斯山脉的火山/深成弧，以及弧或微大陆与主大陆边的碰撞，和/或幕式伸展（裂谷）事件。 在这些环境中形成贱金属和贵金属矿床也非常复杂;然而，更好地了解这些环境中矿床形成的性质和控制将大大提高我们勘探和发现新矿产资源的能力。 我正在调查各种类型的大陆边缘和相关的矿床，包括大陆（“安第斯型”）岩浆弧，形成的大陆边缘附近的相对年轻的弧设置，和“造山”金矿床形成的碰撞后的设置，并在增生棱镜在俯冲扩张脊。 我正在对加拿大不列颠哥伦比亚省和育空地区的科迪勒拉以及墨西哥、新西兰和澳大利亚的其他类似地区进行平行研究。 这项研究的目标是从国际研究中对大陆边构造作用和矿床形成的性质提出新的见解，然后将这些新知识应用于更好地了解加拿大科迪勒拉山脉的构造演化和导致矿床形成的过程。