干旱区生态环境知识资源中心(Arid): Formation of baryte and celestine during supergene processes on sedimentary rock outcrops

Arid

DOI	10.1007/s00531-021-02136-3
	Formation of baryte and celestine during supergene processes on sedimentary rock outcrops
	Matysek, Dalibor; Jirasek, Jakub; Skupien, Petr
通讯作者	Jirasek, J (corresponding author)，Palacky Univ Olomouc, Fac Sci, Dept Geol, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic.
来源期刊	INTERNATIONAL JOURNAL OF EARTH SCIENCES
ISSN	1437-3254
EISSN	1437-3262
出版年	2022
卷号	111 期号:2 页码:623-639
英文摘要	Extraordinarily abundant baryte and rare celestine microcrystals have been recognised during a routine inspection of claystone and siltstone samples from rock outcrops in the northeastern part of the Czech Republic. They occur in geological units of various ages and settings, i.e., the Bohemian Massif (Upper Carboniferous), Outer Carpathians (Jurrasic to Paleogene), and their Quaternary sedimentary cover. Both minerals were described previously in soils from arid regions, which is not the case of the studied area, situated in middle latitudes with a rather oceanic climate. In an area of ca. 1800 km(2), we gathered 147 samples, 81.6% of which yielded baryte, 5.4% baryte and celestine, and 2.7% only celestine. None of these minerals was detected only in 10.2% of samples. Both mineral phases were documented by electron microscopy using backscattered electron imaging (BSE) and semiquantitative energy-dispersive X-ray spectroscopic analysis (EDS). We documented various morphologies of minerals from the baryte-celestine series. The origin of both phases can be ascribed to the release of Ba during rock weathering. Barium (and strontium) concentrations, required for the equilibrium crystallisation of baryte (and celestine) from solutions, is limited by the common-ion effect. Sulfate ions released during the dissolution of co-forming gypsum strongly limit the Ba concentrations in the solution. However, the minimum solubility of the baryte occurs at temperatures close to 0 degrees C, so the supersaturation of the solution and subsequent crystallisation can also occur by cooling. Baryte and celestine are probably common products of rock weathering but are often overlooked due to their submicroscopic size and the methods of studies-they are unlikely to be found on polished samples.
英文关键词	Baryte Celestine Barium cycle Weathering Czech Republic
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000744925200001
WOS关键词	CARBONIFEROUS CULM BASIN ; BARITE PRECIPITATION ; SULFATE MINERALS ; THERMAL HISTORY ; HEAVY-METALS ; TOMOGRAPHY ; MORPHOLOGY ; PALEOSOLS ; SURFACES ; SILESIA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376544
作者单位	[Matysek, Dalibor; Skupien, Petr] Vysola Skola Banska Tech Univ Ostrava, Fac Min & Geol, Dept Geol Engn, 17 Listopadu 15-2172, Ostrava 70800, Czech Republic; [Jirasek, Jakub] Palacky Univ Olomouc, Fac Sci, Dept Geol, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic
推荐引用方式 GB/T 7714	Matysek, Dalibor,Jirasek, Jakub,Skupien, Petr. Formation of baryte and celestine during supergene processes on sedimentary rock outcrops[J],2022,111(2):623-639.
APA	Matysek, Dalibor,Jirasek, Jakub,&Skupien, Petr.(2022).Formation of baryte and celestine during supergene processes on sedimentary rock outcrops.INTERNATIONAL JOURNAL OF EARTH SCIENCES,111(2),623-639.
MLA	Matysek, Dalibor,et al."Formation of baryte and celestine during supergene processes on sedimentary rock outcrops".INTERNATIONAL JOURNAL OF EARTH SCIENCES 111.2(2022):623-639.