Intrusion related gold deposits in the Tanami and Kurundi-Kurinelli goldfields, Northern Territory, Australia: Constraints from LA-ICPMS analysis of fluid inclusions
Intrusion related gold deposits in the Tanami and Kurundi-Kurinelli goldfields, Northern Territory, Australia: Constraints from LA-ICPMS analysis of fluid inclusions
复制标题
澳大利亚北领地 Tanami 和 Kurundi-Kurinelli 金矿区与侵入相关的金矿床：流体包裹体 LA-ICPMS 分析的限制
DOI：
10.1016/j.oregeorev.2019.103189
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发表时间：
2019-12
影响因子：
3.3
通讯作者：
Wygralak Andrew
中科院分区：
文献类型：
--
作者：
Zhou Li;Mernagh Terrence P.;Lan TingGuang;Tang Yanwen;Wygralak Andrew
澳大利亚北领地的Tanami和Kurundi-Kurinelli金矿区的金矿床具有与澳大利亚其他地区典型的脉型造山金矿床不同的地质和地球化学特征。本研究采用阴极发光（CL）和激光消融电感耦合等离子体质谱（LA-ICPMS）分析流体包裹体，以调查来自澳大利亚北方高度矿化的Tanami戈德菲尔德和弱矿化的Kurundi-Kurinelli金田的矿化流体的来源。阴极发光显示三代石英断裂和矿化脉从Groundrush存款在Tanami戈德菲尔德，但其余的存款有统一的黑暗CL images.The LA-ICPMS微量元素数据表明，从B-As富集，岩浆流体的演化，以高度Sr-Ba富集流体与沉积岩的相互作用的结果。这两个地区的流体在变质-岩浆混合趋势的岩浆端具有氯度归一化的Zn和Pb浓度。这与先前的研究一致，表明在Tanami地区金矿化与岩浆作用是同时代的。Tanami和Kurundi-Kurinelli金矿区的流体盐度和微量元素含量均较高，表明这两个地区的矿床都是与侵入岩有关的金矿床。Tanami地区较高的黄金储量可能是由于该地区的多个金矿化事件，而与Kurundi - Kurinelli金矿区的矿化相关的流体流动似乎有限。
Gold deposits in the Tanami and Kurundi-Kurinelli goldfields of the Northern Territory, Australia, have geological and geochemical characteristics that distinguish them from the typical vein-hosted, orogenic gold deposits that occur in other parts of Australia. This study used cathodoluminescence (CL) and laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) analyses of fluid inclusions to investigate the source of mineralising fluids from both the highly mineralised Tanami goldfield and weakly mineralised Kurundi-Kurinelli goldfields in northern Australia. Cathodoluminescence showed three generations of quartz in fractured and mineralised veins from the Groundrush deposit in the Tanami goldfield but the remaining deposits had uniform dark CL images.The LA-ICPMS trace element data indicate an evolution from B-As–enriched, magmatic fluid to a highly Sr-Ba-enriched fluid which results from interaction with sedimentary rocks. The fluids from both regions have chlorinity normalised Zn and Pb concentrations at the magmatic end of the metamorphic – magmatic mixing trend for these elements. This is in agreement with previous studies showing that gold mineralisation is coeval with magmatism in the Tanami region. The relatively high salinity of the fluids in both the Tanami and Kurundi – Kurinelli goldfields, and their trace element contents indicates that the deposits in both regions are intrusion-related gold deposits. The higher gold endowment of the Tanami region may result from the multiple gold-mineralisation events in this region whereas fluid flow associated with mineralisation in the Kurundi – Kurinelli goldfields appears to be of limited extent.
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DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Eromanga Basin;TJ Munson
通讯作者：
Eromanga Basin;TJ Munson
影响因子：
4.8
作者：
J. R. Lang;T. Baker
通讯作者：
J. R. Lang;T. Baker
影响因子：
5
作者：
B. Tagirov;A. Zotov;N. Akinfiev
通讯作者：
B. Tagirov;A. Zotov;N. Akinfiev
影响因子：
2.9
作者：
P. M. Orville
通讯作者：
P. M. Orville
影响因子：
4.8
作者：
T. Baker;J. R. Lang
通讯作者：
T. Baker;J. R. Lang