Targeted U-Pb dating of mafic-ultramafic intrusions, particularly those of economic interest, and characterizing their links with Large Igneous Provinces

对镁铁质-超镁铁质侵入体进行有针对性的 U-Pb 定年，特别是那些具有经济利益的侵入体，并描述它们与大型火成岩省的联系

基本信息

批准号：
557056-2020
负责人：
Ernst, Richard
金额：
$ 2.08万
依托单位：
Carleton University
依托单位国家：
加拿大
项目类别：
Alliance Grants
财政年份：
2021
资助国家：
加拿大
起止时间：
2021-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=721651
关键词：
Targeted Pb dating mafic ultramafic

项目摘要

Magmatic sulphide deposits are a specific kind of ore deposit that is associated with voluminous outpouringsof volcanic rocks known as Large Igneous Provinces, or LIPs. These Provinces can be millions of cubickilometres in volume, and can be significant sources of nickel, cobalt, titanium, vanadium, copper, andplatinum group elements - the mining of which contributes billions of dollars annually to the Canadianeconomy. However, as the most accessible of these ore deposits have already been discovered and mines havelimited lifetimes, new discoveries are essential for Canada's resource sector and are to be found in morechallenging locations or hidden deeper underground. Furthermore, the rocks that make up LIPs (volcanic rocksand their deeper equivalents) are not all capable of hosting ore, and there can be a great deal of variabilitywithin a single LIP's rocks despite their having a common source. This project aims to make the explorationfor these ore deposits easier and more accurate though high-precision measurements of the isotopes of uraniumand lead in specific minerals found in LIP rocks. This will enable their ages to be calculated to high precision,such that distinct phases of igneous activity can be identified and assessed as to their prospectivity withoutengaging in lengthy and expensive drilling campaigns to collect and test what could be millions of dollars'worth of worthless samples. Our industry partners will identify appropriate suites of samples for datinganalysis, and state-of-the-art radio-isotopic analyses will be carried out, thereby bringing together industryexperience with mineral resources and world-class academic researchers.

岩浆硫化物矿床是一种特殊的矿床，与被称为大型火成岩省（LIP）的大量火山岩喷发有关。这些省份的体积可达数百万立方公里，是镍、钴、钛、钒、铜和铂族元素的重要来源——这些元素的开采每年为加拿大经济贡献数十亿美元。然而，由于这些矿床中最容易开采的矿床已经被发现，而且矿山的使用寿命有限，因此新的发现对于加拿大的资源部门至关重要，并且必须在更具挑战性的地点或隐藏在地下更深处的地方发现。此外，构成 LIP（火山岩及其更深的等同物）的岩石并不都能够容纳矿石，并且单个 LIP 的岩石内可能存在很大的可变性，尽管它们具有共同的来源。该项目旨在通过高精度测量 LIP 岩石中特定矿物中的铀和铅同位素，使这些矿床的勘探变得更容易、更准确。这将使它们的年龄能够高精度计算，从而可以识别火成岩活动的不同阶段并评估其前景，而无需进行漫长而昂贵的钻探活动来收集和测试可能价值数百万美元的毫无价值的样本。我们的行业合作伙伴将确定合适的样品套件进行测年分析，并进行最先进的放射性同位素分析，从而将行业经验与矿产资源和世界一流的学术研究人员结合起来。