PETROGENESIS AND TECTONIC SETTING INVESTIGATIONS OF ULTRAMAFIC-MAFIC ROCKS AT THE EAST OF FARIMAN- TORBAT- JAM LINEAMENT, NE OF IRAN

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MOAFPOURIAN G.; POURMOAFI M.; VOSUGHI ABEDINI M.; EMAMI M.; JANNESSARI M.

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Journal: Iranian Journal of Geology Year:2008 | Volume:2 | Issue:7 Page(s): 81-94

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Title

PETROGENESIS AND TECTONIC SETTING INVESTIGATIONS OF ULTRAMAFIC-MAFIC ROCKS AT THE EAST OF FARIMAN- TORBAT- JAM LINEAMENT, NE OF IRAN

Author(s)

Keywords

ULTRAMAFIC- MAFICQ3

KOMATIITEQ3

TRACE ELEMENTQ2

SPINELQ2

Abstract

There are different interpretations on ultramafic rocks suite which are located north of Fariman- Torbat - Jam lineament, NE of Iran. Most authors interpreted these rocks as oceanic crust remnants whereas some authors believe that they are lavas with komatiitic to tholeiitic affinity. Obviously, these different interpretations have contrary geodynamic implications. Here, on the basis of incompatible TRACE ELEMENTs and chemistry of SPINEL, petrogenesis and tectonic setting have been studied. Our observations including various immobile TRACE ELEMENTs rations and position of rocks in (Nb/Th) N versus to (Nb/La) N, Nb/Th versus Zr/Nb diagrams indicating that they are not comparable to MORB like magmas. Moreover in a clear contrast to MORE, most samples are plotted on or upper than Nb line in Zr/Y versus Nb/Y diagram, a geochemical feature that demonstrate their petrogenesis relation to the heterogeneous mantle plume source. The same inference may be bring up by SPINELs chemistry, as they have high and low contents of Ti02, Al203 respectively and set between SPINELs of plume related magma in the related diagrams.

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APA: Copy

MOAFPOURIAN, G., POURMOAFI, M., VOSUGHI ABEDINI, M., EMAMI, M., & JANNESSARI, M.. (2008). PETROGENESIS AND TECTONIC SETTING INVESTIGATIONS OF ULTRAMAFIC-MAFIC ROCKS AT THE EAST OF FARIMAN- TORBAT- JAM LINEAMENT, NE OF IRAN. IRANIAN JOURNAL OF GEOLOGY, 2(7), 81-94. SID. https://sid.ir/paper/129439/en

Vancouver: Copy

MOAFPOURIAN G., POURMOAFI M., VOSUGHI ABEDINI M., EMAMI M., JANNESSARI M.. PETROGENESIS AND TECTONIC SETTING INVESTIGATIONS OF ULTRAMAFIC-MAFIC ROCKS AT THE EAST OF FARIMAN- TORBAT- JAM LINEAMENT, NE OF IRAN. IRANIAN JOURNAL OF GEOLOGY[Internet]. 2008;2(7):81-94. Available from: https://sid.ir/paper/129439/en

IEEE: Copy

G. MOAFPOURIAN, M. POURMOAFI, M. VOSUGHI ABEDINI, M. EMAMI, and M. JANNESSARI, “PETROGENESIS AND TECTONIC SETTING INVESTIGATIONS OF ULTRAMAFIC-MAFIC ROCKS AT THE EAST OF FARIMAN- TORBAT- JAM LINEAMENT, NE OF IRAN,” IRANIAN JOURNAL OF GEOLOGY, vol. 2, no. 7, pp. 81–94, 2008, [Online]. Available: https://sid.ir/paper/129439/en

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