PETROGENESIS OF MIO-PELIOCENE DACITE-ANDESITE VOLCANISM IN SE OF URUMIEH-DOKHTAR MAGMATIC BELT, (NE SHAHR-E-BABAK)

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GHADAMI GH.R.; POOSTI M.; BABAI F.

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Journal: GEOSCIENCES Year:2015 | Volume:25 | Issue:97 Page(s): 37-48

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Information Journal Paper

Title

PETROGENESIS OF MIO-PELIOCENE DACITE-ANDESITE VOLCANISM IN SE OF URUMIEH-DOKHTAR MAGMATIC BELT, (NE SHAHR-E-BABAK)

Author(s)

GHADAMI GH.R. | POOSTI M. | BABAI F. | Issue Writer Certificate

Keywords

DACITEQ2

ANDESITEQ2

NEOQ2

TETHYANQ2

ADAKITEQ2

URUMIEHQ2

DOKHTARQ2

Abstract

Few More than 5 DACITE to ANDESITE volcanic masses with Mio-Pliocene age are exposed to older volcanic rocksat the south and east of the Mozahem volcano, in south-east of URUMIEH- DOKHTAR magmatic belt, north-east of Shahre-Babak. These rocks show hyaloporphyritic- trachytic texture and consist of pPhenocrysts of plagioclase, amphiboles and biotites. Based on geochemical data and multi elements patterns, these rocks are medium to high K calc-alkaline suite and they show LILE and LREE enriched normalized multi-element patterns, and negative Nb, Ti and Ta anomalies. Chondrite normalized REE patterns display a steep decrease from LREE to HREE without any Eu anomaly. They have higher SiO2 and Sr contents and Sr/Y and La/Yb ratios and low MgO, Y and Yb contents than the normal calc-alkaline volcanic rocks. These volcanic rocks are formed in the a subduction zone in an active margin, and showing full complete of HAS (high SiO2 ADAKITEs) characteristics. HREE and Y depleted patterns suggest the existence of garnet and amphibole as a residue in the source. The source of these rocks was probably amphibole-eclogite or garnet-amphibolite possibly generated during subduction or slab break of the NEO-Tethyan oceanic slab beneath the Central Iran microplate in NEOgene.

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APA: Copy

GHADAMI, GH.R., POOSTI, M., & BABAI, F.. (2015). PETROGENESIS OF MIO-PELIOCENE DACITE-ANDESITE VOLCANISM IN SE OF URUMIEH-DOKHTAR MAGMATIC BELT, (NE SHAHR-E-BABAK). GEOSCIENCES, 25(97), 37-48. SID. https://sid.ir/paper/32383/en

Vancouver: Copy

GHADAMI GH.R., POOSTI M., BABAI F.. PETROGENESIS OF MIO-PELIOCENE DACITE-ANDESITE VOLCANISM IN SE OF URUMIEH-DOKHTAR MAGMATIC BELT, (NE SHAHR-E-BABAK). GEOSCIENCES[Internet]. 2015;25(97):37-48. Available from: https://sid.ir/paper/32383/en

IEEE: Copy

GH.R. GHADAMI, M. POOSTI, and F. BABAI, “PETROGENESIS OF MIO-PELIOCENE DACITE-ANDESITE VOLCANISM IN SE OF URUMIEH-DOKHTAR MAGMATIC BELT, (NE SHAHR-E-BABAK),” GEOSCIENCES, vol. 25, no. 97, pp. 37–48, 2015, [Online]. Available: https://sid.ir/paper/32383/en

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