نتایج جستجو برای: alteration mineral mapping

تعداد نتایج: 307775  

سلطانی, صادق, حیدریان شهری, محمد رضا , همام, مسعود , کریم پور, محمد حسن ,

Chah Sorb deposit is located about 66 Km north of Tabas and 16 Km north-west of Shirgesht village. The mineralogy is simple; galena is the main primary mineral and cerussite is the main secondary mineral. Sphalerite, pyrite, chalcopyrite, tetrahedrite are other main minerals. Secondary minerals are anglesite, malachite, flourite, wulfenite, minium, azurite and Fe-hydroxids. Some important alter...

2013
K. Heckman A. S. Grandy X. Gao M. Keiluweit K. Carpenter J. Chorover

Solid and aqueous phase Al species are recognized to affect organic matter (OM) stabilization in forest soils. However, little is known about the dynamics of formation, composition and dissolution of organo-Al hydroxide complexes in microbiallyactive soil systems, where plant litter is subject to microbial decomposition in close proximity to mineral weathering reactions. We incubated gibbsite–q...

The main problem associated with the traditional approach to image classification for the mapping of hydrothermal alteration is that materials not associated with hydrothermal alteration may be erroneously classified as hydrothermally altered due to the similar spectral properties of altered and unaltered minerals. The major objective of this paper is to investigate the potential of a neuro-fuz...

Journal: :Computers & Geosciences 2015
Emmanuel John M. Carranza Alice G. Laborte

Machine learning methods that have been used in data-driven predictive modeling of mineral prospectivity (e.g., artificial neural networks) invariably require large number of training prospect/locations and are unable to handle missing values in certain evidential data. The Random Forests (RF) algorithm, which is a machine learning method, has recently been applied to data-driven predictive map...

Journal: :International Journal of Applied Earth Observation and Geoinformation 2020

2007
Sami I. Serhan Hamed M. Abdel-Haq

In this paper, an efficient technique is proposed to manage the cache memory. The proposed technique introduces some modifications on the well-known set associative mapping technique. This modification requires a little alteration in the structure of the cache memory and on the way by which it can be referenced. The proposed alteration leads to increase the set size virtually and consequently t...

Journal: :Journal of Geoscience and Environment Protection 2023

The aim of this study is to carry out hydrothermal alteration mapping and structural using ASTER images in order identify indices that could guide mining exploration work the Poli area its surroundings. To achieve this, were first preprocessed correct atmospheric effects remove vegetation influence. Secondly, a lineament was conducted by applying Discrete Wavelet Transform (DWT) algorithms Firs...

احمدی خلجی, احمد, رجاییه, مریم, طهماسبی, زهرا ,

The studied area is a small portion of Sanandaj – Sirjan zone. Metasomatism at the contact of intrusive body studied and penetration of Al-rich rocks caused tourmalinization to stratiform tourmalinite in pelitic hornfels. In addition, hydrothermal fluids crystallized tourmaline nodules in monzogranite surface. The Fe/ (Fe + Mg) ratio in varied between 0.4-0.76 in stratiform tourmaline and 0.83-...

2003
Laurel E. Kirkland Kenneth C. Herr Paul M. Adams

Infrared spectral observations have yielded many important insights into the nature of Mars. However, spectral effects tied to surface roughness and particle size can make mineral deposits substantially more difficult to detect and identify than is generally known, including for current investigations. The effects hold for Mars and other planets, but here we focus on the impact on the explorati...

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