Fingerprints of magma mingling processes within the Miocene Zebin tuff cone feeding system (Jicin Volcanic Field, Czech Republic)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10369661" target="_blank" >RIV/00216208:11310/17:10369661 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/17:00000210

Result on the web

<a href="http://dx.doi.org/10.3190/jgeosci.245" target="_blank" >http://dx.doi.org/10.3190/jgeosci.245</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.245" target="_blank" >10.3190/jgeosci.245</a>

Result language

angličtina

Original language name

Fingerprints of magma mingling processes within the Miocene Zebin tuff cone feeding system (Jicin Volcanic Field, Czech Republic)

Original language description

A well-preserved set of partly eroded mid-Miocene scoria cones and tuff cones are exposed in the Jicin Volcanic Field, Czech Republic. Zebin Hill, a formerly quarried tuff cone with an exposed conduit and associated dikes, offers an opportunity to study magmatic processes within the high-level feeding system of a small monogenetic volcano. Two types of dikes and associated &quot;blob-like&quot; intrusions were observed. Pure basanite dikes predominate in the center of the cone, whereas its peripheries were intruded by mingled dikes. The mingled dikes consist of mm-scale basanitic domains enclosed in a network of trachyandesitic dikelets. Locally, hybrid domains with intermediate characteristics were observed. The basanite dikes and basanite enclaves within mingled dikes contain normally-zoned minerals (Fo(90) to Fo(70) olivine, Mg-rich to Mg-poor diopside, labradorite to andesine composition of plagioclase) indicative of basanite magma evolution during ascent. In contrast, the trachyandesite and hybrid enclaves in mingled dikes show reverse zoning of minerals (Mg-poor to Mg-rich diopside, sanidine to oligoclase feldspar composition) indicative of magma hybridization. This study suggests that the Zebin Volcano did not develop from a simple monogenetic system and through a single central axis feeder; rather, Zebin Hill evolved from a complex magma feeding/storage system and through a complex feeder network. We conclude that the simple external structure of a monogenetic volcano may sometimes hide rather complex magmatic plumbing systems encompassing compositionally contrasting rocks/magmas.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GAP210%2F12%2F1990" target="_blank" >GAP210/12/1990: Continental lithosphere as a source of differentiated alkaline lavas and genetic role of basic magmas constraints from volcanism of the Ohře Graben</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

62

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

15

Pages from-to

215-229

UT code for WoS article

000423277800001

EID of the result in the Scopus database

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