metasomatic


Also found in: Dictionary, Wikipedia.
Related to metasomatic: Altered igneous rock

metasomatic

[¦med·ə·sō′mad·ik]
(petrology)
Pertaining to the process or the result of metasomatism.
References in periodicals archive ?
Grant, J.A.: 1986, The isocon diagram-a simple solution to Gresens equation for metasomatic alteration.
Emerald deposits in Poona (Australia) occur in quartz and pegmatite veins related to metasomatic reactions between quartz-muscovite or quartz-topaz-greisens and ultramafic units (Groat et al., 2008); 2) in schist-type deposits that are controlled by thrust faults and shear zones, with or without pegmatites (Sinkankas, 1994; Schwarz and Giuliani, 2001; Zwaan, 2006).
Metasomatic reactions between carbonated plume melts and mantle harzburgite: the evidence from Friday and Domingo seamounts (Juan Fernandez chain, SE Pacific).
A-Hydrothermal Metasomatic deposits in carbonate and dolomitic rocks: Through this process mechanism, when hydrothermal solutions penetrate into the dolomitic rocks, because the ionic radius of calcium is about 36 % bigger than that of the Magnesium, these two elements therefore cannot replace one another isomorphically; however because the Iron ionic radius is not so much different from that of the Magnesium, a series of isomorphic minerals like Magnesite, Hontite, Bronzitite and etc.
Dietrich, "Constitutive mass balance relations between chemical composition, volume, density, porosity, and strain in metasomatic hydrochemical systems: results on weathering and pedogenesis," Geochimica et Cosmochimica Acta, vol.
Drill testing over a 1.3km strike length intersected the following: massive sulphide zones up to 7m grading 9.0g/t Au, 4.4% Cu and 75g/t Ag; narrow high-grade quartz veins up to 1m grading 33g/t Au, as well as high-grade metasomatic replacements up to 2m grading 15g/t Au and 60g/t Ag.
The incompatible element enrichment could reflect a recent metasomatic event in a depleted mantle source, and the small difference in [sup.87]Sr/[sup.86]Sr (~0.0005) and Rb/Sr (0.05) between Juan de Fuca MORB and Bowie seamount basaltic rocks indicates that this event occurred during the last 500 Ma.
The sediments, originally composed of interlayered fine to medium-grained fossiliferous sandstones and silica-rich limestones, locally with a nodular structure, have been affected by metasomatic alteration, concentrated along structural discontinuities such as layer boundaries, fractures and contacts with the lamprophyric intrusions.
Regional metasomatic dolomitization associated with tectonic disturbances in Lower Paleozoic of the Northern Baltic region.
Re-Os ages for Archean molybdenite and pyrite, Kuittila-Kivisuo, Finland, and Proterozoic molybdenite, Kabeliai, Lithuania: testing the chronometer in a metamorphic and metasomatic setting // Mineral.