This paper presents a statistical method for deriving optimal spatial sampling schemes. It focuses on ground verification of minerals derived from hyperspectral data. Spectral angle mapper (SAM) and spectral feature fitting (SFF) classification techniques were applied to obtain rule mineral images. The rule images provide weights that are utilized in simulated annealing. A HyMAP 126channel airb...

Several large-scale porphyry copper deposits (PCDs) with high economic value have been excavated in the Duolong ore district, Tibet, China. However, altitudes and harsh conditions this area make traditional exploration difficult. Hydrothermal alteration minerals related to PCDs diagnostic spectral absorption features visible–near-infrared–shortwave-infrared ranges can be effectively identified ...

[1] Chemical weathering promotes regolith production, physical erosion, nutrient supply, and drawdown of atmospheric CO2. Although mineral dissolution rates show dependences on temperature and moisture in theoretical models and laboratory experiments, effects of climate on chemical erosion rates in nature remain uncertain, in part because variations in physical erosion rates and lithology can o...

Geologic maps are, by their very nature, interpretive documents. In contrast, images prepared from AVIRIS data can be used as uninterpreted, and thus unbiased, geologic maps. We are having significant success applying .AVIRIS data in this non-quantitative manner to geologic problems. Much of our success has come from the power of the Qnked windows Lrteractive Data ~stem. L,inkWinds is a visual ...

The depth to which seawater and fresh water circulate through modern carbonate platforms may be estimated with Sr/Sr isotope ratios of dissolved Sr that is enriched through carbonate mineral dissolution and recrystallization. In 23 water samples from onshore San Salvador Island and Long Island, Bahamas, carbonate mineral dissolution and aragonite-to-calcite transformations elevate Sr concentrat...

The eastern Lut block of Iran has a high potential for porphyry copper mineralization due to the subduction tectonic regime. It is located in an inaccessible region and harsh arid conditions traditional mineral exploration campaigns. objective this study use Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) remote sensing data Simorgh Area, Iran. Hydrothermal alteration zones s...

The mapping of hydrothermal alteration zones associated with epithermal gold deposits on the island of Lesvos in Greece has been carried out using Landsat Thematic Mapper (TM) satellite and ground remote sensing data. The initial analysis of the satellite data using the minimum noise fraction, matched filter and spectral unmixing techniques identified the altered rock outcrops clearly. The iden...

a r t i c l e i n f o a b s t r a c t Classic low-albedo regions of the martian surface are investigated using combined reflectance and emission (" pan-spectral ") data to constrain the types of alteration mineral phases that are present at spectrally significant abundances (>10–15%). The lack of hydrated mineral species observed using near-infrared data suggests that anhydrous chemical alterat...