Essentials of medical geology : impacts of the natural by Olle Selinus

By Olle Selinus

This authoritative reference quantity emphasizes the significance and interrelationships of geological methods to the overall healthiness and ailments of people and animals. Its obtainable structure fosters higher conversation among the future health and geoscience groups by way of elucidating the geologic origins and circulation of poisonous parts within the surroundings that bring about human publicity throughout the intake of meals and water.

For instance, difficulties of extra consumption from consuming water were encountered for numerous inorganic compounds, together with fluoride in Africa and India; arsenic in yes components of Argentina, Chile, and Taiwan; selenium in seleniferous parts within the united states, Venezuela, and China; and nitrate in agricultural components with heavy use of fertilizers. Environmental affects on vector borne ailments and stormflow water caliber impacts also are featured. a variety of examples of the environmental affects on human wellbeing and fitness from around the globe also are awarded and mentioned during this quantity.

* Covers contemporary advances and destiny study issues on the intersection of environmental technological know-how and public health
* constructed by way of 60 specialists from 20 nations and edited via pros from the foreign operating staff on clinical Geology
* contains 2 hundred+ colour images and illustrations
* Organizes details in a hugely established layout for simple reference
* Written for a vast viewers, starting from scholars, researchers, and doctors to policymakers and most of the people

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47 Å), within its interstices. Phyllosilicates are an important group of minerals in both rocks and their weathering products. , montmorillonite), and may contain sodium, potassium, calcium, iron, and magnesium. These minerals have a sheeted mineral structure with pairs of sheets of SiO4 tetrahedra held together tightly by cations; these pairs are held together loosely by other cations. In the case of the mica biotite, iron and magnesium provide the tight bonds and potassium the looser bonds. Muscovite mica is similar, but the tight bonds are provided by aluminum.

The offending substances are then rejected to form discrete minerals along Natural Distribution and Abundance of Elements TABLE II. 27 Common Geochemical Associations Group Associations Generally associated elements K-Rb Ca-Sr Al-Ga Si-Ge Zr-Hf Nb-Ta Rare earths (REEs), La, Y Pt-Ru-Rh-Pd-Os-Ir Au-Ag Plutonic rocks Generally associated elements Specific associations Felsic igneous rocks Alkaline igneous rocks Mafic igneous rocks Ultramafic igneous rocks Some pegmatites Some contact metasomatic deposits Potassium feldspars Many other potassium-rich minerals Ferromagnesian minerals Sedimentary rocks Fe-oxide rich Mn-oxide rich Phosphatic limestones Black shales Si-Al-Fe-Mg-Ca-Na-K-Ti-Mn-Cr-V Zr-Hf-REEs-Th-U-Sr-Ba-P B-Be-Li-Sn-Ga-Nb-Ta-W-Halides Si-K-Na Al-Na-Zr-Ti-Nb-Ta-F-P-Ba-Sr-REEs Fe-Mg-Ti-V Mg-Fe-Cr-Ni-Co Li-Be-B-Rb-Cs-REEs-Nb-Ta-U-Th Mo-W-Sn K-Rb-Ba-Pb K-Na-Rb-Cs-Tl Fe-Mg-Mn-Ni-Co-Cu-Zn Fe-As-Co-Ni-Se Mn-As-Ba-Co-Mo-Ni-V-Zn P-F-U-Cd-Ag-Pb-Mo Al-As-Sb-Se-Mo-Zn-Cd-Ag-U-Au-Ni-V After Rose, Hawkes, and Webb, 1979.

In contrast, kaolinite or gibbsite only contains aluminum and silicon or aluminum, respectively. The elements discussed above are commonly called lithophile (rock loving) and are distinct from other elements referred to as chalcophile, siderophile, or atmophile (Table I). The lithophile elements may occur as silicates, aluminosilicates, oxides, carbonates, sulfates, halides, phosphates, and vanadates, among other mineral forms in the natural environment. An important second group are the chalcophile elements (Table I), which are characterized by forming sulfides, arsenides, antimonides, selenides, and tellurides.

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