Mid-Cretaceous extensional magmatism in the Alborz Mountains, north Iran, geochemistry and geochronology of Gasht-Masuleh gabbros
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00576201" target="_blank" >RIV/67985831:_____/23:00576201 - isvavai.cz</a>
Result on the web
<a href="https://sjg.springeropen.com/articles/10.1186/s00015-023-00443-2" target="_blank" >https://sjg.springeropen.com/articles/10.1186/s00015-023-00443-2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1186/s00015-023-00443-2" target="_blank" >10.1186/s00015-023-00443-2</a>
Alternative languages
Result language
angličtina
Original language name
Mid-Cretaceous extensional magmatism in the Alborz Mountains, north Iran, geochemistry and geochronology of Gasht-Masuleh gabbros
Original language description
In the Gasht-Masuleh area in the Alborz Mountains, gabbroic magma intruded Palaeozoic metasediments and Mesozoic sediments and crystallised as isotropic and cumulate gabbros. LREE enrichment points to relatively low degrees of mantle melting and depletion of Ti, Nb and Ta relative to primitive mantle points to an arc related component in the magma. Clinopyroxene compositions indicate MORB to arc signatures. U–Pb zircon crystallisation ages of 99.5 ± 0.6 Ma and 99.4 ± 0.6 Ma and phlogopite 40Ar/39Ar ages of 97.1 ± 0.4 Ma, 97.5 ± 0.4 Ma, 97.1 ± 0.1 Ma, within 2σ error, indicate that gabbro intrusion occurred in the (Albian-)Cenomanian (mid-Cretaceous). As active subduction did not take place in the Cretaceous in North Iran, the small volume mafic magmatism in the Gasht-Masuleh area must be due to local, extension-related mantle melting. Melting was most likely caused by far field effects triggered by roll-back of the Neo-Tethys subducting slab. As subduction took place at a distance of ~ 400 km (present distance) from the Alborz Mountains, the observed arc geochemical signatures must be inherited from a previous subduction event and concomitant mantle metasomatism, possibly in combination with contamination of the magma by crustal material.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Swiss Journal of Geosciences
ISSN
1661-8726
e-ISSN
1661-8734
Volume of the periodical
116
Issue of the periodical within the volume
1
Country of publishing house
CH - SWITZERLAND
Number of pages
21
Pages from-to
14
UT code for WoS article
001075719200001
EID of the result in the Scopus database
2-s2.0-85171877606