USING WHOLE ROCK AND MINERAL CHEMISTRY FOR DETERMINING THE ORIGIN OF LAMPROPHYRES FROM DEH-BAZARGAN-SARASIAB 6 (NORTH OF KERMAN CITY, KERMAN PROVINCE)

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GHADAMI GHOLAMREZA; BAHRAMPOUR ARMIN; ATAPOUR HABIBE; POOSTI MOHAMMAD; AHMADIPOUR HAMID

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Journal: PETROLOGY Year:2018 | Volume:8 | Issue:32 Page(s): 1-20

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Title

USING WHOLE ROCK AND MINERAL CHEMISTRY FOR DETERMINING THE ORIGIN OF LAMPROPHYRES FROM DEH-BAZARGAN-SARASIAB 6 (NORTH OF KERMAN CITY, KERMAN PROVINCE)

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Keywords

ALKALINE LAMPROPHYREQ1

MONCHIQUITEQ3

DEH-BAZARGANQ1

KERMANQ2

CENTERAL IRANQ2

Abstract

In the north of KERMAN city, between DEH-BAZARGAN and Sarasiab 6 villages and along the Koohbanan fault, several lamprophyric dykes have been intruded the Shemshak, Bidu and Hodjedk Formations. The dykes show porphyry and glomeroporphyry textures and contain coarse-grained phenocrysts of olivine (30 vol.%), pyroxene (20 vol.%) and amphibole (5 vol.%) crystals in a matrix containing 10 vol.% plagioclase and sanidine microlites, fine-grained pyroxene (20 vol.%) and amphiboles (5 vol.%). Electron microprobe analyses show that the pyroxenes are diopside (Fs7.84-15.11) - (Wo42.20-46.75) - (En41.57-49.24), olivines are chrysolite (Fo85.79-91.20), plagioclases are labradorite (An50.94-66.30) and opaque inclusions in olivines are chrome-spinel (Cr1.3-1.25) - (Fe0.708-0.548) - (Al0.518-0.433). Petrographical evidences such as lack of coarse-grained felsic minerals, the presence of porphyritic texture and the co-existence of coarse-grained pyroxene, olivine and amphibole minerals as well as the similar oxides contents of SiO2 (44.25-46.435 wt.%), MgO (5.81-19.125 wt.%), Na2O (1.55-2.035 wt.%), K2O (1.18-1.715 wt.%) to the average of the well-known ALKALINE LAMPROPHYREs (SiO2=42.5 wt.%, MgO=7.25 wt.%, Na2O=35 wt.%, K2O=25 wt.%), suggest that the studied dykes are similar to the ALKALINE LAMPROPHYREs (monchiquites) rather than calcalkaline spessartites. Thermo-barometric studies of pyroxenes show that the rocks under discussion have been formed under pressure of 5-10 Kb and temperature of 700-900oC with less than 10 percent water contents. Whole rock chemical analyses of the studied lamprophyres indicate that the parent magmas were alkaline type and originated from a metasomatized spinel-garnet-lhezrolite mantle source containing hydrous minerals, then they were emplaced in a post-collisional arc setting.

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APA: Copy

GHADAMI, GHOLAMREZA, BAHRAMPOUR, ARMIN, ATAPOUR, HABIBE, POOSTI, MOHAMMAD, & AHMADIPOUR, HAMID. (2018). USING WHOLE ROCK AND MINERAL CHEMISTRY FOR DETERMINING THE ORIGIN OF LAMPROPHYRES FROM DEH-BAZARGAN-SARASIAB 6 (NORTH OF KERMAN CITY, KERMAN PROVINCE). PETROLOGY, 8(32 ), 1-20. SID. https://sid.ir/paper/196914/en

Vancouver: Copy

GHADAMI GHOLAMREZA, BAHRAMPOUR ARMIN, ATAPOUR HABIBE, POOSTI MOHAMMAD, AHMADIPOUR HAMID. USING WHOLE ROCK AND MINERAL CHEMISTRY FOR DETERMINING THE ORIGIN OF LAMPROPHYRES FROM DEH-BAZARGAN-SARASIAB 6 (NORTH OF KERMAN CITY, KERMAN PROVINCE). PETROLOGY[Internet]. 2018;8(32 ):1-20. Available from: https://sid.ir/paper/196914/en

IEEE: Copy

GHOLAMREZA GHADAMI, ARMIN BAHRAMPOUR, HABIBE ATAPOUR, MOHAMMAD POOSTI, and HAMID AHMADIPOUR, “USING WHOLE ROCK AND MINERAL CHEMISTRY FOR DETERMINING THE ORIGIN OF LAMPROPHYRES FROM DEH-BAZARGAN-SARASIAB 6 (NORTH OF KERMAN CITY, KERMAN PROVINCE),” PETROLOGY, vol. 8, no. 32 , pp. 1–20, 2018, [Online]. Available: https://sid.ir/paper/196914/en

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