DOI: 10.1007/s00531-015-1152-8
Scopus记录号: 2-s2.0-84931573409
论文题名: Carbonate inclusions in Lower Cretaceous picrites from the Hončova hůrka Hill (Czech Republic, Outer Western Carpathians): Evidence for primary magmatic carbonates?
作者: Kropáč K. ; Dolníček Z. ; Buriánek D. ; Urubek T. ; Mašek V.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 5 起始页码: 1299
结束页码: 1315
语种: 英语
英文关键词: Carbonated silicate melt
; Magma evolution
; Magmatic carbonate
; Outer Western Carpathians
; Picrite
; Teschenite association
Scopus关键词: carbonate rock
; Cretaceous
; crystallization
; hydrothermal alteration
; magma
; magmatism
; melt
; picrite
; silicate melt
; Carpathians
; Czech Republic
英文摘要: Porphyritic picrites from the Hončova hůrka site in the Silesian Unit (Western Carpathians) are composed mostly of olivine phenocrysts enclosed in a black fine-grained groundmass, which consists of clinopyroxene, biotite, magnetite, chlorite, feldspars, and zeolites. The rocks are variably affected by hydrothermal alteration. The freshest samples contain potentially primary igneous calcite and aragonite, which occur as globular inclusions hosted by olivine phenocrysts, or as fillings of the miarolitic cavities in the picrite groundmass. In this paper, we try to clarify the nature of investigated carbonates using the combination of several petrological methods. Based on the texture, mineral composition, and relationship to the alteration patterns of the host mineral, we distinguished three basic types of inclusions: carbonate inclusions, silicate inclusions, and a combined type consisting of both carbonate and silicate domains. Only the fresh olivine-hosted round carbonate globules can contain the primary igneous calcite. These globules cannot represent immiscible carbonatite melt since they lack Si, alkalis, and other essential components (e.g. P, F, Cl, and S) present in natural carbonate melts. Instead, they can be interpreted as product of equilibrium crystallization of calcite from carbonated silicate melt (i.e. crystal cumulates). In contrast, the calcite–aragonite assemblage in inclusions hosted by altered olivine and in miaroles most probably originated during recrystallization of primary calcite during late-magmatic or post-magmatic stages or is related to the superimposed hydrothermal alteration. © 2015, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931573409&doi=10.1007%2fs00531-015-1152-8&partnerID=40&md5=a13336f6b9179e03556bc2d8175413ab
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70281
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Geology, Palacký University Olomouc, 17. listopadu 12, Olomouc, Czech Republic; Czech Geological Survey, Leitnerova 22, Brno, Czech Republic; Institute of Molecular and Translational Medicine, Palacký University Olomouc, Hněvotínská 5, Olomouc, Czech Republic; Department of Pharmacology, Palacký University Olomouc, Hněvotínská 3, Olomouc, Czech Republic
Recommended Citation:
Kropáč K.,Dolníček Z.,Buriánek D.,et al. Carbonate inclusions in Lower Cretaceous picrites from the Hončova hůrka Hill (Czech Republic, Outer Western Carpathians): Evidence for primary magmatic carbonates?[J]. International Journal of Earth Sciences,2015-01-01,104(5)