Field and experimental constraints on petrogenesis of Cr-Ni-PGE deposits

Cr-Ni-PGE 矿床岩石成因的现场和实验限制

• 批准号: 227836-2009
• 负责人: Mungall, James
• 金额: $ 2.91万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=546840
• 关键词: Field; experimental; constraints; petrogenesis; Cr

Magmatic ore deposits contribute billions of dollars to the global economy annually. The majority of major magmatic ore deposits are related to the flux of mafic magmas from the mantle to the crust, bringing with them valuable metals, notably the base metals Cu, Ni, Co, Fe, Cr, Ti, V and the platinum group elements (PGE; Pt, Pd, Rh, Ru, Ir, Os) and Au. There are several types of magmatic ore deposit that are dominated by or associated with major accumulations of the mineral chromite. To date, no significant production of Cr has ever occured in North America. In this research we are examining an important new deposit of chromite recently discovered in Ontario and comparing it with similar deposits in Finland, India, Brazil and South Africa. We will also do experiments in which we try to recreate the conditions of formation of chromite deposits in magmas at high temperatures and pressures. The results are expected to improve the viability of the new deposit as an engine of economic growth in Canada while also improving our understanding of how deposits of this strategic metal are formed.

岩浆矿床每年为全球经济贡献数十亿美元。大部分大型岩浆矿床都与地幔向地壳的基性岩浆通量有关，并带来了贵重金属，主要是贱金属Cu、Ni、Co、Fe、Cr、Ti、V以及铂族元素（PGE、Pt、Pd、Rh、Ru、Ir、Os）和Au。有几种类型的岩浆岩矿床是由矿物铬铁矿的主要聚集所主导或与之相关的。到目前为止，北美还没有大规模生产铬。在这项研究中，我们正在研究最近在安大略省发现的一个重要的铬铁矿新矿床，并将其与芬兰、印度、巴西和南非的类似矿床进行比较。我们也会做一些实验，试图在高温高压下重现岩浆中铬铁矿沉积的形成条件。预计研究结果将提高新矿床作为加拿大经济增长引擎的可行性，同时也提高我们对这种战略金属矿床如何形成的理解。