MINERALOGY AND STABLE ISOTOPE GEOCHEMISTRY OF HYDROTHERMALLY ALTERED VOLCANIC ROCKS IN SE OF KASHAN

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KANANIAN A.; AMIN ALROAYAEI YAMINI M.; AHMADIAN J.

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Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2008 | Volume:16 | Issue:3 Page(s): 443-458

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Title

MINERALOGY AND STABLE ISOTOPE GEOCHEMISTRY OF HYDROTHERMALLY ALTERED VOLCANIC ROCKS IN SE OF KASHAN

Author(s)

KANANIAN A. | AMIN ALROAYAEI YAMINI M. | AHMADIAN J. | Issue Writer Certificate

Keywords

HYDROTHERMAL ALTERATIONQ2

GEOTHERMOMETRYQ2

STABLE ISOTOPEQ2

BASALTQ2

TOTMAJQ3

Abstract

The submarine volcanic rocks of TOTMAJ volcano-sedimentary sequence, located at 25 Km southeast of Kashan city, have suffered extensive non-uniform propylitization. Based on field and petrographical studies, the volcanic rocks can be classified into three alteration zones: chlorite-epidote zone, epidote zone and hematite zone. The secondary hydrothermal minerals formed in the volcanic rocks include epidote-chlorite, calcite and hematite. These minerals have pseudomorphly replaced the primary phenocrysts (e.g. plagioclase, amphibole, and pyroxene) or have filled veins and vesicles. Stable carbon and oxygen isotope analysis of the hydrothermal calcite indicate that the d18O and d13C values range from -9.2 to -11.3 and -2.02 to -6.02 per mil respectively. Thus, seawater has been a source for hydrothermal fluid which by circulation into the hot submarine lavas, caused to leaching of some elements such as Fe and Mg from the altered rocks with the exception of epidote-chlorite zone. Also, the seawater circulation leads to an increase in Na ratio in the rocks. Geothermometrical studies on hydrothermal chlorite showed that these minerals have formed at a temperature between 240 to 300oC. Furthermore, the ranges of temperature stability of coexisting secondary minerals in the volcanic rocks are compatible with those of the green schist facies.

Cites

PETROLOGY AND GENESIS OF VASH GRANITOID NW NATANZ (ISFAHAN)

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APA: Copy

KANANIAN, A., AMIN ALROAYAEI YAMINI, M., & AHMADIAN, J.. (2008). MINERALOGY AND STABLE ISOTOPE GEOCHEMISTRY OF HYDROTHERMALLY ALTERED VOLCANIC ROCKS IN SE OF KASHAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 16(3), 443-458. SID. https://sid.ir/paper/4032/en

Vancouver: Copy

KANANIAN A., AMIN ALROAYAEI YAMINI M., AHMADIAN J.. MINERALOGY AND STABLE ISOTOPE GEOCHEMISTRY OF HYDROTHERMALLY ALTERED VOLCANIC ROCKS IN SE OF KASHAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2008;16(3):443-458. Available from: https://sid.ir/paper/4032/en

IEEE: Copy

A. KANANIAN, M. AMIN ALROAYAEI YAMINI, and J. AHMADIAN, “MINERALOGY AND STABLE ISOTOPE GEOCHEMISTRY OF HYDROTHERMALLY ALTERED VOLCANIC ROCKS IN SE OF KASHAN,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 16, no. 3, pp. 443–458, 2008, [Online]. Available: https://sid.ir/paper/4032/en

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