CRYSTAL-CHEMISTRY AND WHOLE ROCK GEOCHEMISTRY EVIDENCES FOR MAGMA MIXING, CONTAMINATION AND METASOMATISM IN AKAPOL GRANITOID (SW KELARDASHT, CENTRAL ALBORZ)

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ESMAEILI DARYOUSH; KHALAJ M.; VALIZADEH M.V.

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Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2007 | Volume:15 | Issue:1 Page(s): 169-192

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Title

CRYSTAL-CHEMISTRY AND WHOLE ROCK GEOCHEMISTRY EVIDENCES FOR MAGMA MIXING, CONTAMINATION AND METASOMATISM IN AKAPOL GRANITOID (SW KELARDASHT, CENTRAL ALBORZ)

Author(s)

ESMAEILI DARYOUSH | KHALAJ M. | VALIZADEH M.V. | Issue Writer Certificate

Keywords

MAGMA MIXINGQ2

CONTAMINATIONQ2

AKAPOLQ3

GRANITOIDQ2

RAPAKIVI TEXTUREQ3

Abstract

The crystal-chemistry of the plagioclase, alkali feldspar, biotite, amphibole and whole rock geochemistry of AKAPOL granitic massif are investigated in this paper. The chemical composition of biotites and amphiboles ploted in the annite-siderophyllite, magnesiohornblende and actinolite fields, respectively. Comparison of the chemical composition of biotites and amphiboles with similar minerals from the California granitic batholith indicate that the monzogranitic unit of AKAPOL belongs to the strongly contaminated I-type granites. Accordingly, these rocks are highly contaminated and may have derived from upper mantle and/or lower crustal sources. They have experienced MAGMA MIXING or are affected by CONTAMINATION with upper crustal rocks. These results are consistent with the curve like logarithmic diagrams of compatible/incompatible elements; the presence of the sieve, poikilitic and RAPAKIVI TEXTUREs; the partial absorption of the plagioclase phenocherists; the presence of mafic microgranular enclaves and needle apatite in the samples. Based on this study, two types of plagioclase in monzogranitic unit can be recognized in the monzogranitic unit: the first generation occur in the alkali feldspar phenochrysts and the second generation is in the form of covering crystals in rapakivi and sieve textures which probably formed during MAGMA MIXING.

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References

پترولوژی و ژئوشیمی توده گرانیتوئیدی اکاپل (جنوب غرب کلاردشت)

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APA: Copy

ESMAEILI, DARYOUSH, KHALAJ, M., & VALIZADEH, M.V.. (2007). CRYSTAL-CHEMISTRY AND WHOLE ROCK GEOCHEMISTRY EVIDENCES FOR MAGMA MIXING, CONTAMINATION AND METASOMATISM IN AKAPOL GRANITOID (SW KELARDASHT, CENTRAL ALBORZ). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 15(1), 169-192. SID. https://sid.ir/paper/3897/en

Vancouver: Copy

ESMAEILI DARYOUSH, KHALAJ M., VALIZADEH M.V.. CRYSTAL-CHEMISTRY AND WHOLE ROCK GEOCHEMISTRY EVIDENCES FOR MAGMA MIXING, CONTAMINATION AND METASOMATISM IN AKAPOL GRANITOID (SW KELARDASHT, CENTRAL ALBORZ). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2007;15(1):169-192. Available from: https://sid.ir/paper/3897/en

IEEE: Copy

DARYOUSH ESMAEILI, M. KHALAJ, and M.V. VALIZADEH, “CRYSTAL-CHEMISTRY AND WHOLE ROCK GEOCHEMISTRY EVIDENCES FOR MAGMA MIXING, CONTAMINATION AND METASOMATISM IN AKAPOL GRANITOID (SW KELARDASHT, CENTRAL ALBORZ),” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 15, no. 1, pp. 169–192, 2007, [Online]. Available: https://sid.ir/paper/3897/en

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