MAPPING HYDROTHERMAL ALTERATION MINERALS AND SILICIC PARTS ACCOMPANIED BY GOLD MINERALIZATION USING ASTER DATA IN HIRED AREA (SOUTH OF BIRJAND )

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

ALIMOHAMMADI M.; BEHNIA P.; KHAKZAD A.; GHORBANI M.A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: GEOSCIENCES Year:2009 | Volume:18 | Issue:70 Page(s): 154-165

Download Full-Text

Persian Verion

View:

2,264

Download:

Cites:

Information Journal Paper

Title

MAPPING HYDROTHERMAL ALTERATION MINERALS AND SILICIC PARTS ACCOMPANIED BY GOLD MINERALIZATION USING ASTER DATA IN HIRED AREA (SOUTH OF BIRJAND )

Author(s)

ALIMOHAMMADI M. | BEHNIA P. | KHAKZAD A. | GHORBANI M.A. | Issue Writer Certificate

Keywords

HIRED GOLDQ3

SISTAN SUTURE ZONEQ2

IMAGE PROCESSINGQ3

THERMAL INFRA REDQ3

ASTER IMAGESQ3

Abstract

HIRED GOLD-bearing area is located to the northeast of the Lut zone and in the vicinity of the SISTAN SUTURE ZONE. Several post Eocene plutons have intruded into the Eocene volcanic and pyroclastic units and caused hydrothermal alteration and mineralization of gold, copper, lead and zinc. We have applied the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data including three visible and near infrared (VNIR), six shortwave infrared (SWIR) and five thermal infrared (TIR) bands to determine the alteration minerals of HIRED GOLD-bearing area. Spectral analysis of the surface reflectance SWIR manifests absorption in 2.20 mm and 2.33mm wavelength regions. Absorption at 2.20mm (band6), due to Al-OH anionic agent is consistent with the presence of clay minerals (illite, kaolinite) and sericite, whereas absorption at 2.33mm (band 8) due to Mg-OH anionic agent and carbonates is consistent with the occurrence of chlorite, epidote and calcite minerals.In this study different IMAGE PROCESSING techniques such as band combination, band ratios transformation, and Binary Encoding were used to identify and delineate the altered minerals accompanied by gold mineralization. The Binary Encoding method was found to be the best IMAGE PROCESSING technique for delineation of the hydrothermally formed minerals.Analysis of the spectral emission data in the five TIR bands has provided valuable lithological information. It would not be possible to identify silicified rocks in the nine VNIR+SWIR bands due to the lack of recognizable spectral absorption features in quartz at this wavelength region. We have therefore mapped Quartz-bearing surface deposits as well as hydrothermally silicified rocks in the TIR region by using a band ratio (b11×b11) / (b10×b12) image. The results obtained from ASTER data are compatible with conclusions inferred from petrographic and XRD studies of the surface samples. The ASTER data appear to be useful in mapping hydrothermal alteration and in ore deposit exploration.

Cites

No record.

References

گزارش نقشه زمین شناسی معدنی با مقیاس 1:20000 ناحیه امید بخش معدنی طلای هیرد (شمال غرب نهبندان)

Cite

APA: Copy

ALIMOHAMMADI, M., BEHNIA, P., KHAKZAD, A., & GHORBANI, M.A.. (2009). MAPPING HYDROTHERMAL ALTERATION MINERALS AND SILICIC PARTS ACCOMPANIED BY GOLD MINERALIZATION USING ASTER DATA IN HIRED AREA (SOUTH OF BIRJAND ). GEOSCIENCES, 18(70), 154-165. SID. https://sid.ir/paper/31665/en

Vancouver: Copy

ALIMOHAMMADI M., BEHNIA P., KHAKZAD A., GHORBANI M.A.. MAPPING HYDROTHERMAL ALTERATION MINERALS AND SILICIC PARTS ACCOMPANIED BY GOLD MINERALIZATION USING ASTER DATA IN HIRED AREA (SOUTH OF BIRJAND ). GEOSCIENCES[Internet]. 2009;18(70):154-165. Available from: https://sid.ir/paper/31665/en

IEEE: Copy

M. ALIMOHAMMADI, P. BEHNIA, A. KHAKZAD, and M.A. GHORBANI, “MAPPING HYDROTHERMAL ALTERATION MINERALS AND SILICIC PARTS ACCOMPANIED BY GOLD MINERALIZATION USING ASTER DATA IN HIRED AREA (SOUTH OF BIRJAND ),” GEOSCIENCES, vol. 18, no. 70, pp. 154–165, 2009, [Online]. Available: https://sid.ir/paper/31665/en

Related Journal Papers