PETROLOGY OF SHALLOW INTRUSIONS OF NODEH ENGLAB, SOUTHEASTERN JOGHATAY, KHORASAN RAZAVI PROVINCE

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KHALATBARI JAFARI M.; KONANI P.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:96 Page(s): 213-220

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Title

PETROLOGY OF SHALLOW INTRUSIONS OF NODEH ENGLAB, SOUTHEASTERN JOGHATAY, KHORASAN RAZAVI PROVINCE

Author(s)

KHALATBARI JAFARI M. | KONANI P. | Issue Writer Certificate

Keywords

CALC ALKALINEQ2

DACITEQ2

QUARTZ MONZODIORITEQ1

MINGLINGQ2

ADAKITEQ2

Abstract

The shallow massive lava-dome located around Nodeh Engelab, SE Joghatay in Khorasan Razavi province cutting the Eocene volcanic rocks in northern part of the Sabzevar ophiolitic belt, are covered by Pliocene-Quaternary deposits. The margin of bodies comprise of lavas of basalt, phyric andesite basalt and fluvial andesitic compositions, but the middle parts and roof of the masses are composed of phyric andesite-trachy andesite, phyric-aphyric DACITEs and QUARTZ MONZODIORITE. No pyroclastic deposits were observed around these masses. The sieve texture and oscillatory zoning in plagioclase crystals could be attributed to disequilibrium in magma chamber. The lava from the margins of shallow massive bodies has CALC ALKALINE nature and the rocks from middle parts of the bodies show CALC ALKALINE to high-K CALC ALKALINE affinities. The spider diagrams of margin lavas have substantial compliance with those of the middle parts of the bodies and show enrichment in Rb, Ba, Th, La, Sr, and distinct depletion in Nb and Ti. Despite some samples plotting in the adakitic field, they do not display chemical characteristic of typical ADAKITEs. It seems that the parental magma of the studied shallow intrusions produced from partial melting of mantle wedge which had different enrichment and probably influenced by the materials released from the subducted slab. The other scenario is that the observed features could be attributed to the partial melting of metamorphosed mafic rocks at the top of the subducted slab.

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APA: Copy

KHALATBARI JAFARI, M., & KONANI, P.. (2015). PETROLOGY OF SHALLOW INTRUSIONS OF NODEH ENGLAB, SOUTHEASTERN JOGHATAY, KHORASAN RAZAVI PROVINCE. GEOSCIENCES, 24(96), 213-220. SID. https://sid.ir/paper/32492/en

Vancouver: Copy

KHALATBARI JAFARI M., KONANI P.. PETROLOGY OF SHALLOW INTRUSIONS OF NODEH ENGLAB, SOUTHEASTERN JOGHATAY, KHORASAN RAZAVI PROVINCE. GEOSCIENCES[Internet]. 2015;24(96):213-220. Available from: https://sid.ir/paper/32492/en

IEEE: Copy

M. KHALATBARI JAFARI, and P. KONANI, “PETROLOGY OF SHALLOW INTRUSIONS OF NODEH ENGLAB, SOUTHEASTERN JOGHATAY, KHORASAN RAZAVI PROVINCE,” GEOSCIENCES, vol. 24, no. 96, pp. 213–220, 2015, [Online]. Available: https://sid.ir/paper/32492/en

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