Application of X-ray photoelectron spectroscopy in mineral deposit studies
Application of X-ray photoelectron spectroscopy in mineral deposit studies
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X射线光电子能谱在矿床研究中的应用
DOI：
10.1080/03717453.2017.1306294
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Smith M
中科院分区：
文献类型：
--
作者：
Smith M
与二氧化硅不饱和霞石正长岩有关的矿床是稀土元素（REE）和铌等关键金属以及许多其他商品（如磷、钛和锆石）的重要来源。特别是，它是高过碱性或超重力霞石正长岩，通常与Nb，REE，Zr和Ti的经济浓度有关（例如格陵兰的Ilímaussaq）。然而，瘴气霞石正长岩含有低得多的这些元素的浓度，通常不经济的矿化。因此，瘴气岩的矿化实例，如罗马尼亚的Ditru碱性火成杂岩（DAIC），具有真实的意义，因为它们进一步丰富了稀土供应基础，从而降低了潜在的供应风险。三叠纪DAIC是罗马尼亚东北部的一个瘴气霞石正长岩体。环形侵入体倾斜，覆盖面积约200 km（伦茨等人，2013年）。西北部为一系列斜长角闪岩、碱性闪长岩和辉长岩，东部出露正长岩、霞石正长岩和碱性花岗岩。东部边缘由热液蚀变霞石正长岩组成，被认为代表了杂岩的顶部区域（Honour 2015）。该复合体被一系列矿化矿脉切割，主要含有碳酸盐和硫化物脉石中的独居石和褐帘石。以前的工作主要集中在复杂的年龄和岩石成因和相关矿化的矿物学。然而，试图
Mineral deposits associated with silica-undersaturated, nepheline syenites are an important source of critical metals, such as the rare earth elements (REE) and niobium, and a number of other commodities (eg phosphorus, titanium and zircon). In particular, it is highly-peralkaline, or hyperagpaitic nepheline syenites that are typically associated with economic concentrations of Nb, REE, Zr and Ti (eg Ilímaussaq in Greenland). However, miaskitic nepheline syenites contain much lower concentrations of these elements and are typically not economically mineralised. Therefore mineralised examples of miaskitic rocks, such as the Ditrãu Alkaline Igneous Complex (DAIC) in Romania, are of real interest because they further diversify the REE supply base, thus reducing potential risk to supply.The Triassic DAIC is a miaskitic nepheline syenite body in north-eastern Romania. The ring-shaped intrusion is tilted and covers an area of approximately 200 km (Lenz et al. 2013). To the north-west it comprises a series of amphibolites, and alkali diorites and gabbros, with syenites, nepheline syenites and alkali granites cropping out in the east. The eastern margin comprises hydrothermally altered nepheline syenite that is considered to represent the roof-zone of the complex (Honour 2015). The complex is cut by a series of mineralised veins that contain predominantly monazite and allanite in a carbonate and Sulfide gangue. Previous work has largely focused on the age and petrogenesis of the complex and the mineralogy of the associated mineralisation. However, attempts to
南格陵兰纳鲁纳克古元古代剪切带金矿床的地质和成因
DOI：
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发表时间：
2000
期刊：
影响因子：
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作者：
K. Kaltoft;D. Schlatter;L. Kludt
通讯作者：
L. Kludt