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Journal of Geochemical Exploration
IF
3.47
Papers
4344
Papers 4367
1 page of 437 pages (4,367 results)
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Abstract This work constitutes a contribution to the knowledge on the occurrence of nodular monazite in the Monfortinho (Idanha-a-Nova) alluviums and its genesis. A new edition of the alluvial nodular monazite regional distribution map is presented, underlining its wide occurrence and preferential concentration in the north-western and central zones of this region. The assessment of the geological and environmental evolution during Neoproterozoic-Palaeozoic and Caenozoic times and alluvial nodul...
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Abstract Geomorphology is an important control on the formation of bauxite. However, geomorphological research on bauxite deposit formation is usually hampered by the lack of systematic detailed data collection. This study focuses on the Wuchuan–Zheng'an–Daozheng (Wu–Zheng–Dao) area of northern Guizhou Province, South China, an area containing bauxite deposits of the Dazhuyuan Formation. These deposits formed during the early Permian in a period associated with the peak timing of the late Paleoz...
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Abstract Deeply buried Upper Permian (Zechstein) carbonates in the southwestern North German Basin host widespread Zn-Fe-Pb sulfide mineralization. The spatial extent of the sediment-hosted mineralization, the geochemical formation conditions, and the number of mineralizing events that are manifested in the Permian sedimentary rocks are an ongoing matter of debate and interest for mineral exploration efforts in the North German Basin. We present detailed petrographic and geochemical data of ore ...
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Abstract Groundwater chemistry has been predominantly used in geochemical exploration studies to identify mineralized targets concealed under transported cover in areas with gentle topography. Another potentially valuable application that has received little attention is using groundwater chemistry to identify deposits concealed within mountain ridges. A number of geochemical exploration studies have employed surface water chemistry in hilly and mountainous terrain and have demonstrated mixed su...
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Abstract This paper reports on the concentration levels of lead (Pb), cadmium (Cd), zinc (Zn) and nickel (Ni) in soil and water in the Migori gold mining area of Kenya. To determine the possible entry into the food chain, samples of fish, maize, cabbages, mangoes, potatoes and human scalp hair were collected and analysed from three (3) sites within and one (1) site outside, the study area. The aim was to establish potential health risks posed to miners and communities who consume food crops and ...
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Abstract Gold mineralization in the Geita Hill deposit is associated with pyrite formed along microfracture networks and sulfidation fronts together with K-feldspar and biotite. The sulfidation fronts are best developed in magnetite-bearing ironstone. The gold is present mainly as electrum and gold tellurides along grain boundaries, and as inclusions in pyrite, quartz, biotite and K-feldspar. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of pyrite and magnetite...
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Abstract Skarn type deposits are important potential resources for Cu, Au, and Ag as well as other strategic metals, which require accurate characterization of the mineralogy, texture and grade for successful processing and environmental management. The mineralogy of these deposits and of the resulting tailings has traditionally been examined using transmitted light microscopy, cathodoluminescence, X-ray diffraction, scanning electron microscopy, and electron probe microanalysis. In the present ...
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Abstract Farahabad is a Lower Cretaceous-age sandy dolomite, sandstone and silty limestone hosted zinc-lead deposit in the southern Yazd basin, Iran. This deposit occurs in the lower part of Taft Formation. The Farahabad deposit is a stratiform and stratabound accumulation of hydrothermal sulfides. The mineralized zone at Farahabad is lens shaped and has a relatively flat top. It also ranges greatly in thickness, from a few meters to >30 m. Three styles of ore facies have been differentiated at ...
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Abstract Human activities such as farming have contributed to the contamination of water bodies. Studying the spatial and temporal variations of parameters that influence water quality is essential for determining whether the water is suitable for human consumption and the ecosystem. This work presents the results from a study of the Tenango Dam, Mexico, which was aimed at determining the spatial and temporal variability of water quality parameters. To this end, five field visits were conducted ...
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Abstract This paper provides a case-study analysis on a thallium contamination related to the past activity in the dismissed mining sites of Monte Arsiccio and Pollone (Lucca Province, Tuscany, Italy). This site has received a lively public attention in recent times, after the finding of thallium at concentration of concern in drinkable waters, far exceeding the U.S. EPA threshold of 2 μg/L. Already published studies, plus original data, focusing on the different aspects of this case study are h...
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Geomorphology
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