RB–SR AND SM–ND ISOTOPIC COMPOSITIONS, U-PB AGE AND PETROGENESIS OF KHAJEH MOURAD PALEO-TETHYS LEUCOGRANITE, MASHHAD, IRAN

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KARIMPOUR M.H.; FARMER G.L.; STERN C.R.

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Journal: GEOSCIENCES Year:2011 | Volume:20 | Issue:80 Page(s): 171-182

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Information Journal Paper

Title

RB–SR AND SM–ND ISOTOPIC COMPOSITIONS, U-PB AGE AND PETROGENESIS OF KHAJEH MOURAD PALEO-TETHYS LEUCOGRANITE, MASHHAD, IRAN

Author(s)

KARIMPOUR M.H. | FARMER G.L. | STERN C.R. | Issue Writer Certificate

Keywords

U-PBQ3

ZIRCONQ2

LEUCOGRANITEQ2

ILMENITE SERIESQ2

MAGNETIC SUSCEPTIBILITYQ2

PEGMATITEQ2

Abstract

Biotite-muscovite LEUCOGRANITE and associated PEGMATITE intruded meta-ophiolite and meta-flysch (the remnants of Paleo-Tethys) during collision of Turan plate with Iran plate. Four types of PEGMATITE dykes, crosscutting biotite muscovite LEUCOGRANITE, are identified. The results of U-PB ZIRCON age of Khajeh Mourad biotite muscovite LEUCOGRANITE is 205.9±4.1 Ma (Late Triassic, Rhaetian). Chemically, biotite muscovite LEUCOGRANITE and aplite granite are peraluminous S-type pluton. MAGNETIC SUSCEPTIBILITY of biotite muscovite LEUCOGRANITE and aplite granite are between than 0-5×10-5 and the ratio of ferric to ferrous ratio (<0.35), therefore they are classified as belonging to the ilmenite-series (reduced type). The total REE content of biotite muscovite LEUCOGRANITE is between TREE=130-176 and aplite is very low Total REE=50.79. They have small negative Eu anomalies (Eu/Eu*=0.52 to 0.76). The initial87Sr/86Sr and (143Nd/144Nd) i was recalculated to an age of 205 Ma. Initial 87Sr/86Sr ratios for B-M LEUCOGRANITE and aplite are 0.708161-0.709853. The (143Nd/144Nd) i isotope composition for B-M LEUCOGRANITE 0.512214, aplite dykes 0.512024. Initial ε Nd isotope values for B-M LEUCOGRANITE -6.48 and aplite dykes is -6.83. These values could be considered as representative of continental crust-derived magmas. The ratios of Rb/Sr=1-1.3 and CaO/Na2O≈0.3 of biotite-muscovite LEUCOGRANITE indicate that the source rock had a composition between meta-pelite and meta-psammite.

Cites

ژئوشیمی و نحوه تشکیل تورمالین های پگماتیتی و رگه ای در لوکوگرانیت های مشهد

References

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APA: Copy

KARIMPOUR, M.H., FARMER, G.L., & STERN, C.R.. (2011). RB–SR AND SM–ND ISOTOPIC COMPOSITIONS, U-PB AGE AND PETROGENESIS OF KHAJEH MOURAD PALEO-TETHYS LEUCOGRANITE, MASHHAD, IRAN. GEOSCIENCES, 20(80), 171-182. SID. https://sid.ir/paper/31435/en

Vancouver: Copy

KARIMPOUR M.H., FARMER G.L., STERN C.R.. RB–SR AND SM–ND ISOTOPIC COMPOSITIONS, U-PB AGE AND PETROGENESIS OF KHAJEH MOURAD PALEO-TETHYS LEUCOGRANITE, MASHHAD, IRAN. GEOSCIENCES[Internet]. 2011;20(80):171-182. Available from: https://sid.ir/paper/31435/en

IEEE: Copy

M.H. KARIMPOUR, G.L. FARMER, and C.R. STERN, “RB–SR AND SM–ND ISOTOPIC COMPOSITIONS, U-PB AGE AND PETROGENESIS OF KHAJEH MOURAD PALEO-TETHYS LEUCOGRANITE, MASHHAD, IRAN,” GEOSCIENCES, vol. 20, no. 80, pp. 171–182, 2011, [Online]. Available: https://sid.ir/paper/31435/en

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