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Apr 26, 2018 Magnetite is rock mineral and one of the most important iron ore minerals with chemical formula is iron(II,III) oxide, Fe2+Fe3+2O4 .It also as the name magnetic minerals to attracted to a magnet. It is the most magnetic natural occuring minerals in the World. Small grains of magnetite occur in almost all igneous and metamorphic rocks. Sep 01, 1985 MAGNETITE IN METAMORPHIC ROCKS Primary controls Magnetite is produced by the breakdown of (Fe, Mg) silicates at all levels of regional metamorphism. The two most important determinants of how much secondary magnetite can form during metamorphism are total iron content and oxidation state. The first fixes an upper limit on the potential Aug 01, 2011 The mechanism of magnetic remanence acquisition of pyrrhotite bearing low-grade metamorphic rocks was discussed in several papers (e.g. Crouzet et al. 2001). Schill et al. (2002) even suggested that the ratio of pyrrhotite-to-magnetite remanence intensities can be used as a relative low-temperature geothermometer, based on increasing pyrrhotite Magnetite is an important ore of iron. Well formed crystals are popular among mineral collectors, and the magnetic Lodestone variety is frequently sold in hobby shops to amateur collectors. Magnetite is also of significant interest to the science community due to its strong magnetic properties. May 31, 2013 Metamorphic rocks form from pre-existing rocks ("parent rocks") due to changes in either temperature, pressure, or volatiles within the earth, often by a combination of all three. Volatiles are those chemical substances, including water and carbon dioxide, that easily turn into gas or fluid and are mobile enough to move in and out of solid rock Rocks that form at high temperatures generally do not have the same problems. However, there are many kinds of metamorphic rocks, and some of them are more chemically reactive than others. 8.9 Sheared serpentinite with pencil for scale, Marin County, California. Low-grade metamorphic rocks form at low temperatures, generally between 150 and 450
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