کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4732892 | 1356924 | 2006 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Petrology of the intrusive rocks within the Sungun Porphyry Copper Deposit, Azerbaijan, Iran
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Petrology of the intrusive rocks within the Sungun Porphyry Copper Deposit, Azerbaijan, Iran Petrology of the intrusive rocks within the Sungun Porphyry Copper Deposit, Azerbaijan, Iran](/preview/png/4732892.png)
چکیده انگلیسی
The Sungun intrusive complex hosting the Sungun porphyry copper stock is located about 75Â km north west of Ahar, in Azarbaijan province, and intruded along the Sungun anticline into Cretaceous limestone and Eocene tuff and agglomerate of andesitic to trachytic composition. Based on the petrography and geochemistry, it is suggested that the Sungun deposit as a composite stock comprising an early monzonite/quartzmonzonite and a later diorite/granodiorite phase. The parental magma was a medium- to high-K andesite or diorite, initially contained 3Â wt% H2O, and was generated in a continental arc setting. The high-level emplacement of this magma, led to its saturation with H2O and the exsolution of fluids at an early stage of crystallization, and subsequently Mo and then Cu mineralization. Based on the major- and trace-element geochemistry, especially the behaviour of the immobile trace elements (Y, Zr and Nb) fractional crystallization is suggested as the process that produced the present intrusive rocks. The degree of fractionation was estimated using the Rayleigh fractionation equation, relating the concentration of Zr, Nb and Y in the least evolved sample to the concentrations of these elements in progressively more evolved samples. The results of these calculations indicate that the compositions of the various rock types can be explained by up to 24% fractionation of ferromagnesian minerals [e.g. pyroxene and amphibole] of the diorite magma to produce the more evolved monzonite/quartz-monzonite suite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Earth Sciences - Volume 27, Issue 3, August 2006, Pages 326-340
Journal: Journal of Asian Earth Sciences - Volume 27, Issue 3, August 2006, Pages 326-340
نویسندگان
Ardeshir Hezarkhani,