The main focus of geochemistry is to:
Understand the principles governing the distribution and re-distribution of elements, ionic species andisotope ratios in earth materials, so that we can interpret the formation of mineral assemblages: conditions (P, T, etc.), processes (magmatic crystallization, weathering, chemical precipitation, metamorphism, etc.), and even the age.
Predict changes in mineral assemblages (minerals, concentrations of elements, isotopic ratios) if a given mineral assemblage is subjected to different conditions (T, P, interaction with a fluid, etc.)
Predict changes in mineral assemblages (minerals, concentrations of elements, isotopic ratios) if a given mineral assemblage is subjected to different conditions (T, P, interaction with a fluid, etc.)
The name “geochemistry” was first introduced by Schonbein since more than 150 years.
Clark, who was a chief chemist of the US. Geological Survey from 1884 to 1925, has contributed very much to the science "geochemistry". The modern science of geochemistry can be dated back to Clark who published a very large number of chemical analyses of the various rocks in the earth's crust. He computed averages for each common rock type and studied the mutual abundance and distribution of many major and minor elements.
Goldschmidt (1888 - 1947) contributed significantly to the roles of ionic size, coordination and atomic substitution in crystal lattices. He gave a practical definition for the science geochemistry, as it deals with:
1) the abundance of elements in rock, mineral or crystal,
2) the distribution of the elements, and
3) lows governing the abundance and distribution of elements in rock, mineral or crystal.
Clark, who was a chief chemist of the US. Geological Survey from 1884 to 1925, has contributed very much to the science "geochemistry". The modern science of geochemistry can be dated back to Clark who published a very large number of chemical analyses of the various rocks in the earth's crust. He computed averages for each common rock type and studied the mutual abundance and distribution of many major and minor elements.
Goldschmidt (1888 - 1947) contributed significantly to the roles of ionic size, coordination and atomic substitution in crystal lattices. He gave a practical definition for the science geochemistry, as it deals with:
1) the abundance of elements in rock, mineral or crystal,
2) the distribution of the elements, and
3) lows governing the abundance and distribution of elements in rock, mineral or crystal.
There are several trials to classify elements on geochemical basis. Names such as siderophile, chalcophile, lithophile, hydrophile, thalassophile, atmophile are commonly used to denote particular geochemical affinity of elements.
Modern advances in geochemistry are enormous in different academic and applied disciplines. The revolution in the analytical techniques, especially the coupled inductively plasma-mass spectrometry facilitated data with very high precision on all components of the earth, such as water, soil, sediments, air, rock, crystals and minerals.
Recently, huge data are accumulating on the geochemistry of the REE, PGM and the inert gases.
Ionization potential energy required to remove the least tightly bound electron
Electron affinity energy given up as an electron is added to an element
Electronegativity quantifies the tendency of an element to attract a shared electron when bonded to another element.
Modern advances in geochemistry are enormous in different academic and applied disciplines. The revolution in the analytical techniques, especially the coupled inductively plasma-mass spectrometry facilitated data with very high precision on all components of the earth, such as water, soil, sediments, air, rock, crystals and minerals.
Recently, huge data are accumulating on the geochemistry of the REE, PGM and the inert gases.
Ionization potential energy required to remove the least tightly bound electron
Electron affinity energy given up as an electron is added to an element
Electronegativity quantifies the tendency of an element to attract a shared electron when bonded to another element.
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