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Talc carbonates are a suite of rock and mineral compositions found in metamorphosed ultramafic rocks.
The term refers to the two most common end-member minerals found within ultramafic rocks which have undergone talc-carbonation or carbonation reactions: talc and the carbonate mineral magnesite.
Talc carbonate mineral assemblages are controlled by temperature and pressure of metamorphism and the partial pressure of carbon dioxide within metamorphic fluids, as well as by the composition of the host rock.[1]
^Bjerga, A.; Konopásek, J.; Pedersen, R.B. (2015). "Talc–carbonate alteration of ultramafic rocks within the Leka Ophiolite Complex, Central Norway". Lithos. 227: 21–36. Bibcode:2015Litho.227...21B. doi:10.1016/j.lithos.2015.03.016.
rocks which have undergone talc-carbonation or carbonation reactions: talc and the carbonate mineral magnesite. Talccarbonate mineral assemblages are controlled...
and water. This is known as "talc carbonation" or "steatization" and produces a suite of rocks known as talccarbonates. Talc is primarily formed by hydration...
talc". In industrial applications soapstone refers to dimension stone that consists of either amphibole-chlorite-carbonate-talc rock, talc-carbonate rock...
meteorite impact Talccarbonate – A metamorphosed ultramafic rock with talc as an essential constituent; similar to a serpentinite Soapstone – Talc-bearing metamorphic...
split into layers). Other common minerals include quartz, orthoclase, talc, carbonate minerals and amphibole (actinolite). Greenschist is a general field...
but restricted in distribution, around high-temperature metamorphic talccarbonates, generally in the form of an aureole around ultramafic rocks. Such...
reaction 2(b) is just as likely, and supported by the presence of abundant talc-carbonate schists and magnesite stringer veins in many serpentinised peridotites;...
distinctive talc-carbonate alteration. Brucite rapidly converts to magnesite and serpentine minerals (other than antigorite) are converted to talc. The presence...
results in two main classes of metamorphic ultramafic rock; talccarbonate and serpentinite. Talc carbonation reactions occur in ultramafic rocks at lower...
all talc products to be asbestos-free, and today there is strict quality control in the production of talc products. Separating cosmetic-grade talc (e...
agate. In Swat, pale green to green coloured emeralds can be found in talc-carbonate schist. In Hunza, well formed pink to red crystals of ruby are found...
events like diagenesis/burial heating etc. Magnesite can be formed via talccarbonate metasomatism of peridotite and other ultramafic rocks. Magnesite is...
metamorphic sulfide minerals, chiefly millerite, during serpentinization and talccarbonate alteration. When metamorphic olivine is produced, the propensity for...
and talc. Thus, in terms of bulk mineralogy, listwanites consist primarily of quartz (often of a rusty red colour), carbonate, serpentine, talc, ± mariposite/fuchsite...
metamorphic sulfide minerals, chiefly millerite, during serpentinization and talccarbonate alteration. When metamorphic olivine is produced, the propensity for...
use calcium carbonate as a filler, while gum bases for acid flavored gum use talc as a filler, since acids can react with calcium carbonate to produce...
Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under...
resemblance with talc and its high water content. Multiple structures containing loosely bound carbonate ions exist. The easily exchanged carbonates allow for...
and talc. Carbonates are found as limestone and siltstone; some limestones were formed by living beings. At one point in the drill core, carbonates were...
mineral with a higher index scratches those below it. The scale ranges from talc, a phyllosilicate, to diamond, a carbon polymorph that is the hardest natural...
as is talc schist. Talc schist also forms from metamorphosis of talc-bearing carbonate rocks formed by hydrothermal alteration. Graphite schist is uncommon...
include the stearates of calcium and magnesium, silica and various silicates, talc, as well as flour and starch. Ferrocyanides are used for table salt. The...
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