Volume 18, Issue 2 (7-2010)                   www.ijcm.ir 2010, 18(2): 223-232 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Mineral chemistry of chlorite as a method for geothermometry of hydrothermal alteration from Qezildash sulfide deposit, NW IRAN. www.ijcm.ir 2010; 18 (2) :223-232
URL: http://ijcm.ir/article-1-522-en.html
Abstract:   (5358 Views)

Chlorite group minerals have a wide range of chemical compositions which reflect the physicochemical conditions of their crystallization. The solid solution (cationic substitution) model in crystal lattice of chlorite were satisfactorily used in estimation of its formation temperature in different geologic environments such as ore deposits, low-degree metamorphism, hydrothermal alteration and diagenesis by some researchers. In present research, the chlorite geothermometry method was used in the estimation of temperature of hydrothermal alteration and massive sulfide mineralization in the Qezildash area, northwest of Khoy city. In this work, at first, petrographic and mineralogical (XRD) studies were carried out on the samples taken from surface and borehole drilling cores. Eleven chlorite crystal grains which belong to different parts of hydrothermal system were selected and analyzed by electron microprobe equipment. Structural formulate were calculated on the basis of 14 oxygens. Chlorites have significant compositional variations and atomic solid solutions which reflect their formation temperatures. Chlorites from different parts of orebody and unmineralized altered rocks gave temperatures of formation of 318 to 368°C, and 202-210°C respectively. High-temperature chlorites have smaller Si contents than chlorites formed at low- temperatures.

Full-Text [PDF 119 kb]   (1211 Downloads)    
Type of Study: Research | Subject: Special

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Iranian Journal of Crystallography and Mineralogy

Designed & Developed by : Yektaweb