水成岩中 "不动 "钛的命运:乌拉尔古生代大规模硫化物矿床富硅铁质沉积岩的证据

IF 2.2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Minerals Pub Date : 2024-09-13 DOI:10.3390/min14090939
Nuriya R. Ayupova, Valery V. Maslennikov, Irina Yu. Melekestseva, Dmitry A. Artemyev, Elena V. Belogub
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引用次数: 0

摘要

乌拉尔火山成因块状硫化物(VHMS)矿床中古生代富硅铁沉积岩的形成被认为是混有钙钛矿/有机物或硫化物物质的透明闪长岩海底蚀变的结果。这些岩石中含有各种钛矿物相,表明在透明闪长岩的海底蚀变过程中,前驱体元古代二氧化钛相转变为无序锐钛矿,随后转变为球状和团状,并进一步转变为成岩金红石。LA-ICP-MS 分析表明,部分被细微分散的硅-铁聚集体取代的透明钙钛矿中的 Ti 含量增加到 540-2950 ppm,而透明钙钛矿之后的全硅-铁假晶中的 Ti 含量则下降(<5 ppm)。LA-ICP-MS元素图谱显示,锐钛矿球粒富含V、U、Cr、W、Nb、Pb和Th元素,Zr、Y和REE元素在其外围局部聚集。岩石中一些透明碎屑岩和生物形态聚集体外部区域的腐蚀性生物成因纹理含有锐钛矿颗粒与磷灰石的集合体,这表明了钛的亲生物特性。这项研究填补了有关VHMS矿床中透明沸石低温海底蚀变过程中Ti迁移的知识空白。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Fate of “Immobile” Ti in Hyaloclastites: An Evidence from Silica–Iron-Rich Sedimentary Rocks of the Urals Paleozoic Massive Sulfide Deposits
The formation of Paleozoic silica–iron-rich sedimentary rocks in the Urals volcanic-hosted massive sulfide (VHMS) deposits is considered a result of seafloor alteration of hyaloclastites mixed with calcareous/organic or sulfide material. These rocks host various Ti mineral phases pointing to the transformation of precursor metacolloidal TiO2 phases to disordered anatase during seafloor alteration of hyaloclastites, which was later converted to globules and clusters and further to diagenetic rutile. The LA-ICP-MS analysis showed that the Ti content of hyaloclasts partly replaced by finely dispersed Si–Fe aggregates increases to 540–2950 ppm and decreases (<5 ppm) in full Si–Fe pseudomorphs after hyaloclasts. LA-ICP-MS element mapping reveals the enrichment in V, U, Cr, W, Nb, Pb, and Th of the anatase globules and the local accumulation of Zr, Y, and REE on their periphery. Corrosive biogenic textures in the outer zones of some hyaloclasts and biomorphic aggregates in rocks contain anatase particles in assemblage with apatite indicating the biophilic properties of Ti. This work fills the knowledge gaps about Ti mobilization during low-temperature seafloor alteration of hyaloclastites in VHMS deposits.
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来源期刊
Minerals
Minerals MINERALOGY-MINING & MINERAL PROCESSING
CiteScore
4.10
自引率
20.00%
发文量
1351
审稿时长
19.04 days
期刊介绍: Minerals (ISSN 2075-163X) is an international open access journal that covers the broad field of mineralogy, economic mineral resources, mineral exploration, innovative mining techniques and advances in mineral processing. It publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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