Carbonate inclusions in Lower Cretaceous picrites from the Hončova hůrka Hill (Czech Republic, Outer Western Carpathians): Evidence for primary magmatic carbonates?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000102" target="_blank" >RIV/00025798:_____/15:00000102 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/15:33155756 RIV/61989592:15110/15:33155756

Result on the web

<a href="http://dx.doi.org/10.1007/s00531-015-1152-8" target="_blank" >http://dx.doi.org/10.1007/s00531-015-1152-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00531-015-1152-8" target="_blank" >10.1007/s00531-015-1152-8</a>

Result language

angličtina

Original language name

Carbonate inclusions in Lower Cretaceous picrites from the Hončova hůrka Hill (Czech Republic, Outer Western Carpathians): Evidence for primary magmatic carbonates?

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Earth Sciences

ISSN

1437-3254

e-ISSN

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Volume of the periodical

104

Issue of the periodical within the volume

5

Country of publishing house

DE - GERMANY

Number of pages

17

Pages from-to

1299-1315

UT code for WoS article

000356462200011

EID of the result in the Scopus database

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