Potentials of Airborne Hyperspectral AVIRIS-NG Data in the Exploration of Base Metal Deposit—A Study in the Parts of Bhilwara, Rajasthan

Remote Sensing

Snehamoy Chatterjee¹  K.Vinod Kumar²  Arindam Guha²  Nikhil Kumar Baranval²  AminBeiranvand Pour³  PamarajuV. N. Rao⁴  Joyasree Sinha⁵  Nisha Rani⁵  Uday Kumar Ghosh⁵  Ratnakar Bhaisal⁵ 

[1]Department of Geological and Mining Engineering and Science, Michigan Technological University, Houghton, MI 49931, USA

[2]Geosciences Group, National Remote Sensing Centre, Indian Space Research Organization, Balanagar, Hyderabad 500010, India

[3]Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu (UMT), Kuala Nerus 21030, Malaysia

[4]National Remote Sensing Centre, Indian Space Research Organization, Hyderabad 500010, India

[5]Photogeology and Remote Sensing Division, 29, Jawaharlal Nehru Road, Geological Survey of India, Kolkata 700016, India

关键词: AVIRIS-NG;    base metal;    continuum removed spectral bands;    ground magnetic data;    banded magnetite quartzite;    multi-rangespectral feature fitting;   

DOI  :  10.3390/rs13112101

来源: DOAJ

【 摘 要 】

In this study, we have processed the spectral bands of airborne hyperspectral data of Advanced Visible Infrared Imaging Spectrometer-Next Generation (AVIRIS-NG) data for delineating the surface signatures associated with the base metal mineralization in the Pur-Banera area in the Bhilwara district, Rajasthan, India.The primaryhost rocks of the Cu, Pb, Zn mineralization in the area are Banded Magnetite Quartzite (BMQ), unclassified calcareous silicates, and quartzite. We used ratio images derived from the scale and root mean squares (RMS) error imagesusing the multi-range spectral feature fitting (MRSFF) methodto delineate host rocks from the AVIRIS-NG image. The False Color Composites (FCCs) of different relative band depth images, derived from AVIRIS-NG spectral bands, were also used for delineating few minerals. These minerals areeither associated with the surface alteration resulting from the ore-bearing fluid migration orassociated with the redox-controlled supergene enrichments of the ore deposit.The results show that the AVIRIS-NG image products derived in this study can delineate surface signatures of mineralization in 1:10000 to 1:15000 scales to narrow down the targets for detailed exploration.This study alsoidentified the possible structural control over the knownsurface distribution of alteration and lithocap minerals of base metal mineralizationusing the ground-based residual magnetic anomaly map. This observationstrengthens the importance of the identified surface proxiesas an indicator of mineralization. X-ray fluorescence analysis of samples collectedfromselected locations within the study area confirms the Cu-Pb-Zn enrichment. The sulfide minerals were also identified in the microphotographs of polished sections of rock samples collected from the places where surface proxies of mineralization were observed in the field. This study justified the investigation to utilize surface signatures of mineralization identified using AVIRIS-NG dataand validated using field observations, geophysical, geochemical, and petrographical data.

【 授权许可】

Unknown