Mapping Hydrothermally Altered Minerals and Gossans using Hyperspectral data in Eastern Kumaon Himalaya, India

Govil, Himanshu; Mishra, Gaurav; Gill, Neetu; Taloor, Ajay Kumar; Diwan, Prabhat

doi:10.1016/j.acags.2021.100054

Cited by 18 publications

(5 citation statements)

References 18 publications

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“…Alteration zones: This study reports four altered zones at Makili, Villa, Pala, Berau, and Atauro, and all four zones have undergone hydrothermal alteration. The resulting alteration types are quartz and clay: argillic alteration, propylitic alteration, dolomitic alteration, and chloritic alteration of quartz, clay, and sericite-Filik (Figure 7d) (Govil et al, 2021) on Atauro Island, East Timor. This research collects secondary data from several observation locations or samples to describe specific characteristics or phenomena.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, this four-region trend defines the left horizontal fault zone, which consists of both a strike-slip and a strike-slip zone. The left horizontal Fault is a mineralisation trapline that hosts significant sulphide mineralisation (Govil et al, 2021). Submarine Hydrothermal Systems: Dispersal Centers and Island Arcs interest researchers because of the hydrothermal fluid systems in the Island's arc (Pirajno, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste

Gomes,

Sutarto,

Soesilo

et al. 2024

ajosh

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The geological structural patterns and hydrothermal alteration zones of Atauro Island, Timor-Leste, which are influenced by the collision mechanism between the Banda Arc and the Australian Continent, are the subject of this study. The study identifies fault types and alteration zones through stereographic analysis. It indicates the possibility of mineralization in the area. Four alteration zones were identified in this study: argillic, Propylitic, calcosite, and geotite. The analysis results show that left-striking and normal faulting were essential in forming these zones. The mineralization zones, mainly chalcopyrite and chalcocite, are related to the north-northeast trending left horizontal Fault. In addition, this study suggests additional research that includes mineralogy, geochemical, and geophysical analyses to understand more about the characteristics of hydrothermal alteration zones and possible mineralization on Atauro Island. The results of this study are expected to improve our understanding of mineral resources in the region, and it is suggested that this information be considered by authorities responsible for the management of potential natural resources on Atauro Island, Timor.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste

Gomes,

Sutarto,

Soesilo

et al. 2024

ajosh

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“…Alteration mineral mapping. Alteration mineral mapping is one of the main research contents of HRS, which has been extensively studied [2,[4][5][6][7][8][9][10]23,24] . In general, the diagnostic absorption features of anions are mainly located in the 2000-2500 nm range, and the diagnostic absorption features of Fe 2+ , Fe 3+ and Mn 2+ are mainly located in the 400-1200 nm range [25,26] .…”

Section: Methodsmentioning

confidence: 99%

“…Compared with multispectral imagery, more diagnostic absorption features of ground objects are recorded in hyperspectral imagery, so a number of studies based on these data have illustrated applications of structural interpretation [3,4] , mineral [4][5][6][7][8][9][10] and lithologic mapping [11][12][13] . Furthermore, from spectral characteristics, mineral chemistry, grain size [14] or the physical and chemical conditions of oreforming uids [15] can also be estimated.…”

Section: Introductionmentioning

confidence: 99%

Application of Gaofen-5 Hyperspectral Data in Uranium Exploration: A Case Study of Weijing in Inner Mongolia, China

Zhang

Pan

2021

Preprint

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Gaofen-5 (GF-5) satellite is the world's first full-spectrum hyperspectral satellite to achieve comprehensive observations of the atmosphere and land. The Advanced Hyperspectral Imager (AHSI) carried by GF-5 can acquire 330-chanel imagery covering 390 - 2500 nm. However, the application of GF-5 AHSI imagery in uranium exploration is currently unknown. In this paper, the AHSI imagery was used for prospecting uranium mineralization in the Weijing, Inner Mongolia, China. The matched filter (MF) and threshold segmentation were used for mapping goethite, Al-high, Al-medium and Al-poor sericite. And the principal component analysis (PCA) and gray-level co-occurrence matrix (GLCM) were used to extract the texture information of the study area. Subsequently, combined with geological information, the relationship between alteration information, texture complexity and uranium mineralization was discussed, and it was pointed out that goethite, Al-medium, Al-poor sericite and texture complexity in this area can be used as indicators of uranium mineralization. Finally, three prospects were delineated, which will guide the follow-up uranium exploration in this area and promote the application of GF-5 AHSI data.

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“…Tourism, festivals, and trekking, which are important for the country's economy and cultural practices, too, are largely dependent on natural ecosystems (Sears et al, 2017). Among the other provisioning services from the high-elevation ecosystems are minerals, coals, metal ores, and salt (Govil et al, 2021).…”

Section: Cryosphere and Ecosystem Servicesmentioning

confidence: 99%

Chapter 4: Effects of a changing cryosphere on biodiversity and ecosystem services, and response options in the Hindu Kush Himalaya

Chaudhary¹,

Chettri²,

Adhikari³

et al. 2023

Water, Ice, Society, and Ecosystems in the Hindu Kush Himalaya: An Outlook

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Chapter 4 of the Water, ice, society, and ecosystems in the HKH (HI-WISE) assessment report assesses the scientific literature on the impacts of the changing cryosphere on biodiversity and ecosystem services in the Hindu Kush Himalaya (HKH) as well as response options. The cryosphere supports a region of vast, interconnected biodiversity, with 40% of the HKH under environmental protection. As the cryosphere changes, serious impacts on biodiversity at the ecosystem, genetic, and species levels mean an overwhelming majority of animal and plant species are negatively affected, sometimes to extinction. Even if global warming is limited to 1.5°C, the HKH is likely to face serious impacts in terms of species loss, ecosystem structure, and productivity, resulting in lowered ecosystem services flows.

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Mapping Hydrothermally Altered Minerals and Gossans using Hyperspectral data in Eastern Kumaon Himalaya, India

Cited by 18 publications

References 18 publications

Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste

Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste

Application of Gaofen-5 Hyperspectral Data in Uranium Exploration: A Case Study of Weijing in Inner Mongolia, China

Chapter 4: Effects of a changing cryosphere on biodiversity and ecosystem services, and response options in the Hindu Kush Himalaya

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