Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis
The alkali-basalt and basaltic trachy-andesites volcanic rocks of south Marzanabad were erupted during Cretaceous in central Alborz, which is regarded as the northern part of the Alpine-Himalayan orogenic belt. Based on petrography and geochemistry, en route fractional crystallization of ascending m...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2016-11-01
|
Series: | Geoscience Frontiers |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987115001309 |
id |
doaj-0eb9c616750a47d9be4a6f98c5e57cb6 |
---|---|
record_format |
Article |
spelling |
doaj-0eb9c616750a47d9be4a6f98c5e57cb62020-11-25T00:23:18ZengElsevierGeoscience Frontiers1674-98712016-11-017693795110.1016/j.gsf.2015.11.004Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesisRoghieh Doroozi0Carmela Vaccaro1Fariborz Masoudi2Riccardo Petrini3Faculty of Earth Science, Shahid Beheshti University, Velenjak, Tehran, IranDepartment of Mineralogy, University of Ferrara, Corso Ercole I d'Este 32, 44100 Ferrara, ItalyFaculty of Earth Science, Shahid Beheshti University, Velenjak, Tehran, IranDepartment of Mathematics and Geosciences, University of Trieste, Via Weiss, 8-34100 Trieste, ItalyThe alkali-basalt and basaltic trachy-andesites volcanic rocks of south Marzanabad were erupted during Cretaceous in central Alborz, which is regarded as the northern part of the Alpine-Himalayan orogenic belt. Based on petrography and geochemistry, en route fractional crystallization of ascending magma was an important process in the evolution of the volcanic rocks. Geochemical characteristics imply that the south Marzanabad alkaline basaltic magma was originated from the asthenospheric mantle source, whereas the high ratios of (La/Yb)N and (Dy/Yb)N are related to the low degree of partial melting from the garnet bearing mantle source. Enrichment pattern of Nb and depletion of Rb, K and Y, are similar to the OIB pattern and intraplate alkaline magmatic rocks. The K/Nb and Zr/Nb ratios of volcanic rocks range from 62 to 588 and from 4.27 to 9 respectively, that are some higher in more evolved samples which may reflect minor crustal contamination. The isotopic ratios of Sr and Nd respectively vary from 0.70370 to 0.704387 and from 0.51266 to 0.51281 that suggest the depleted mantle as a magma source. The development of south Marzanabad volcanic rocks could be related to the presence of extensional phase, upwelling and decompressional melting of asthenospheric mantle in the rift basin which made the alkaline magmatism in Cretaceous, in northern central Alborz of Iran.http://www.sciencedirect.com/science/article/pii/S1674987115001309Volcanic rocksCretaceousMarzanabadCentral AlborzIran |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Roghieh Doroozi Carmela Vaccaro Fariborz Masoudi Riccardo Petrini |
spellingShingle |
Roghieh Doroozi Carmela Vaccaro Fariborz Masoudi Riccardo Petrini Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis Geoscience Frontiers Volcanic rocks Cretaceous Marzanabad Central Alborz Iran |
author_facet |
Roghieh Doroozi Carmela Vaccaro Fariborz Masoudi Riccardo Petrini |
author_sort |
Roghieh Doroozi |
title |
Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis |
title_short |
Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis |
title_full |
Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis |
title_fullStr |
Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis |
title_full_unstemmed |
Cretaceous alkaline volcanism in south Marzanabad, northern central Alborz, Iran: Geochemistry and petrogenesis |
title_sort |
cretaceous alkaline volcanism in south marzanabad, northern central alborz, iran: geochemistry and petrogenesis |
publisher |
Elsevier |
series |
Geoscience Frontiers |
issn |
1674-9871 |
publishDate |
2016-11-01 |
description |
The alkali-basalt and basaltic trachy-andesites volcanic rocks of south Marzanabad were erupted during Cretaceous in central Alborz, which is regarded as the northern part of the Alpine-Himalayan orogenic belt. Based on petrography and geochemistry, en route fractional crystallization of ascending magma was an important process in the evolution of the volcanic rocks. Geochemical characteristics imply that the south Marzanabad alkaline basaltic magma was originated from the asthenospheric mantle source, whereas the high ratios of (La/Yb)N and (Dy/Yb)N are related to the low degree of partial melting from the garnet bearing mantle source. Enrichment pattern of Nb and depletion of Rb, K and Y, are similar to the OIB pattern and intraplate alkaline magmatic rocks. The K/Nb and Zr/Nb ratios of volcanic rocks range from 62 to 588 and from 4.27 to 9 respectively, that are some higher in more evolved samples which may reflect minor crustal contamination. The isotopic ratios of Sr and Nd respectively vary from 0.70370 to 0.704387 and from 0.51266 to 0.51281 that suggest the depleted mantle as a magma source. The development of south Marzanabad volcanic rocks could be related to the presence of extensional phase, upwelling and decompressional melting of asthenospheric mantle in the rift basin which made the alkaline magmatism in Cretaceous, in northern central Alborz of Iran. |
topic |
Volcanic rocks Cretaceous Marzanabad Central Alborz Iran |
url |
http://www.sciencedirect.com/science/article/pii/S1674987115001309 |
work_keys_str_mv |
AT roghiehdoroozi cretaceousalkalinevolcanisminsouthmarzanabadnortherncentralalborzirangeochemistryandpetrogenesis AT carmelavaccaro cretaceousalkalinevolcanisminsouthmarzanabadnortherncentralalborzirangeochemistryandpetrogenesis AT fariborzmasoudi cretaceousalkalinevolcanisminsouthmarzanabadnortherncentralalborzirangeochemistryandpetrogenesis AT riccardopetrini cretaceousalkalinevolcanisminsouthmarzanabadnortherncentralalborzirangeochemistryandpetrogenesis |
_version_ |
1725357744002695168 |