The petrogenetic link between Kiruna-type ore deposits and their host silicic igneous rocks: the Vergenoeg Fe-F-REE deposit in the Bushveld large igneous province (South Africa).
基律纳型矿床与其宿主硅质火成岩之间的成岩联系:布什维尔德大火成岩省(南非)的 Vergenoeg Fe-F-REE 矿床。
基本信息
- 批准号:281585760
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2015
- 资助国家:德国
- 起止时间:2014-12-31 至 2019-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Silicic large igneous provinces (SLIPs) frequently contain important Fe (±Cu, ±REE, ±U, ±P, ±F) ore deposits. The formation of such ore deposits, especially the relative roles of magmatic versus hydrothermal/metasomatic processes, is under debate since decades and the deposits are mostly classified as iron oxide-copper-gold (IOCG)-type or Kiruna-type deposits. In this study, we propose to reconstruct the petrogenetic evolution of the Vergenoeg F-Fe-REE deposit in South Africa, one of the largest F deposits of the world. The Vergenoeg deposit is situated within one of the largest SLIPs of the world, the volcanic Rooiberg Group, which is part of the Bushveld large igneous province and is dominated by rhyolites. Several contradicting petrogenetic models have been proposed for metal enrichment in Vergenoeg, which can be grouped into magmatic versus hydrothermal approaches. We will study melt inclusions trapped in quartz, feldspars, fayalite, magnetite, and apatite of the hosting felsic rock types (Rooiberg rhyolites and Bushveld granitoids) and the ore body in order to identify the source for ore formation at Vergenoeg, i.e., immiscible Fe-rich melt vs. Fe-F-REE rich granitic melt (hydrothermal formation of the ore by expulsion of Fe-F-REE-rich fluids). These investigations will be complemented by Fe and O stable isotope analyses of the ore and the host rocks. Major and trace element analysis of the main ore phases magnetite, fayalite, fluorite and apatite will provide insight into the partitioning of elements (especially the REE) between immiscible melts and/or their behavior during hydrothermal solution, enrichment and re-precipitation processes. The results of the study will provide important data allowing to elucidate the role of magmatic and/or hydrothermal processes on the formation of Fe (±REE, ±F) ore deposits in SLIPs and will contribute to a better understanding of the petrogenetic link between these Fe-F-REE and either IOCG-type or Kiruna-type ore deposits.
硅质大火成岩省(SLIPs)中往往含有重要的Fe(±Cu,±REE,±U,±P,±F)矿床。这种矿床的形成,特别是岩浆与热液/交代过程的相对作用,几十年来一直存在争议,这些矿床大多被归类为氧化铁-铜-金(IOCG)型或基律纳型矿床。在这项研究中,我们建议重建的Vergenoeg F-Fe-REE存款在南非,世界上最大的F矿床之一的成岩演化。Vergenoeg存款位于世界上最大的SLIP之一,火山Rooiberg群,这是布什维尔德大火成岩省的一部分,主要是韵律。几个矛盾的成岩模式已被提出的金属富集在Vergenoeg,这可以分为岩浆与热液的方法。我们将研究长英质岩石类型(Rooiberg流纹岩和Bushveld花岗岩类)和矿体的石英、长石、铁橄榄石、磁铁矿和磷灰石中捕获的熔融包裹体,以确定Vergenoeg的成矿源,即,不混溶的富Fe熔体与富Fe-F-REE花岗岩熔体(通过富Fe-F-REE流体的排出形成矿石的热液)。这些调查将通过矿石和寄主岩石的Fe和O稳定同位素分析来补充。对主要矿相磁铁矿、铁橄榄石、萤石和磷灰石的主量和微量元素分析将提供对不混溶熔体之间的元素(特别是稀土元素)分配和/或它们在热液溶解、富集和再沉淀过程中的行为的深入了解。研究结果将提供重要数据,有助于阐明岩浆和/或热液过程对SLIP中Fe(±REE,±F)矿床形成的作用,并将有助于更好地了解这些Fe-F-REE之间的岩石成因联系IOCG型或基律纳型矿床。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Formation of the Vergenoeg F–Fe–REE Deposit (South Africa) by Accumulation from a Ferroan Silicic Magma
Vergenoeg FâFeâREE 矿床(南非)由硅铁岩浆堆积形成
- DOI:10.1093/petrology/egaa010
- 发表时间:2020
- 期刊:
- 影响因子:3.9
- 作者:Brandt;Faßbender;M. L. Vennemann
- 通讯作者:M. L. Vennemann
In-situ trace element and Fe-isotope studies on magnetite of the volcanic-hosted Zhibo and Chagangnuoer iron ore deposits in the Western Tianshan, NW China
- DOI:10.1016/j.chemgeo.2017.02.001
- 发表时间:2017-03
- 期刊:
- 影响因子:3.9
- 作者:T. Günther;R. Klemd;X. Zhang;I. Horn;S. Weyer
- 通讯作者:T. Günther;R. Klemd;X. Zhang;I. Horn;S. Weyer
Mantle sources and magma evolution of the Rooiberg lavas, Bushveld Large Igneous Province, South Africa
南非布什维尔德大火成岩省 Rooiberg 熔岩的地幔来源和岩浆演化
- DOI:10.1007/s00410-018-1477-y
- 发表时间:2018
- 期刊:
- 影响因子:3.5
- 作者:Günther;Teschner
- 通讯作者:Teschner
Origin of discordant ultramafic pegmatites in the Bushveld Complex from externally-derived magmas
- DOI:10.25131/sajg.121.0027
- 发表时间:2018-09
- 期刊:
- 影响因子:1.8
- 作者:R. Cawthorn;R. Latypov;R. Klemd;A. Vuthuza
- 通讯作者:R. Cawthorn;R. Latypov;R. Klemd;A. Vuthuza
Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?
- DOI:10.1016/j.lithos.2018.04.017
- 发表时间:2018-06
- 期刊:
- 影响因子:3.5
- 作者:T. Günther;K. Haase;M. Junge;T. Oberthür;Dominic Woelki;S. Krumm
- 通讯作者:T. Günther;K. Haase;M. Junge;T. Oberthür;Dominic Woelki;S. Krumm
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Professor Dr. Reiner Klemd其他文献
Professor Dr. Reiner Klemd的其他文献
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{{ truncateString('Professor Dr. Reiner Klemd', 18)}}的其他基金
The metamorphic evolution and geochronology of blueschists and the immediate country rocks in the South Tianshan of Tajikistan
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