MICRO-TEXTURE AND MINERALOGY OF FE-TI OXIDES FROM QAREAGHAJ MAFIC-ULTRAMAFIC INTRUSION, NW URMIA

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MIRMOHAMMADI M.S.; KANANIAN A.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2007 | Volume:15 | Issue:1 Page(s): 147-160

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Title

MICRO-TEXTURE AND MINERALOGY OF FE-TI OXIDES FROM QAREAGHAJ MAFIC-ULTRAMAFIC INTRUSION, NW URMIA

Author(s)

MIRMOHAMMADI M.S. | KANANIAN A. | Issue Writer Certificate

Keywords

QAREAGHAJQ2

ILMENITEQ2

MAGNETITEQ2

FTP ROCKSQ3

Abstract

Detailed studies on micro-texture and microprobe analysis of Fe-Ti oxides from QAREAGHAJ mafic-ultramafic intrusion (QMUI) is the basis of this investigation. The QMUI is mainly composed of non-mineralized mafic and Fe-Ti-P-rich ultramafic rocks (FTP). The FTP with high proportion of ILMENITE (~11-19 modal %) and MAGNETITE (~2-13 modal %) show an unusual bulk composition. Fe-Ti oxides are divided into three distinct generations on the basis of their micro-texture: 1) small-sized rounded to ellipsoid-shape inclusion in olivine and clinopyroxene, 2) coarse interstitial grains and 3) late stage veinlets. The ILMENITE grains (0.1-2mm) commonly contain fine hematite lenses arranged in [0001] planes. Primary Ti-magnetites contain ILMENITE lamellae along the [111] planes and exhibit wide variety of exsolution textures (e.g., trellis- and sandwich-types). ILMENITE in FTP show Xilm range from 0.82-0.91 and has high MgO (0.82-2.38 wt %). Most Ti-magnetites (bulk composition) have low Xusp (0.03-0.13) and therefore high Xmag (0.79-0.93). Two oxide geothermobarometer in the ILMAT program, resulted in re-equilibration temperature range of 450-700ْ C and ƒO2 (nearly -19±3) during subsolidus cooling for FTP ROCKS.

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APA: Copy

MIRMOHAMMADI, M.S., & KANANIAN, A.. (2007). MICRO-TEXTURE AND MINERALOGY OF FE-TI OXIDES FROM QAREAGHAJ MAFIC-ULTRAMAFIC INTRUSION, NW URMIA. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 15(1), 147-160. SID. https://sid.ir/paper/3896/en

Vancouver: Copy

MIRMOHAMMADI M.S., KANANIAN A.. MICRO-TEXTURE AND MINERALOGY OF FE-TI OXIDES FROM QAREAGHAJ MAFIC-ULTRAMAFIC INTRUSION, NW URMIA. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2007;15(1):147-160. Available from: https://sid.ir/paper/3896/en

IEEE: Copy

M.S. MIRMOHAMMADI, and A. KANANIAN, “MICRO-TEXTURE AND MINERALOGY OF FE-TI OXIDES FROM QAREAGHAJ MAFIC-ULTRAMAFIC INTRUSION, NW URMIA,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 15, no. 1, pp. 147–160, 2007, [Online]. Available: https://sid.ir/paper/3896/en

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