Paragenetic Mode 41 : Mantle metasomatism
Return to the list of paragentic modesDescription
Mantle metasomatism is a high-pressure hydrothermal metamorphic process that alters the chemistry of existing ultramafic minerals and produces new phases through interactions with deep C-O-H fluids.Stage
| Stage 5: Initiation of plate tectonics - Age: <3.5-2.5 Ga |
|---|
| 38 : Ophiolites |
| 39 : High-π metamorphism (blueschist, eclogite, ultrahigh π facies) |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
| 41 : Mantle metasomatism |
| 42 : Sea-floor Mn nodules |
| 43 : Shear-induced minerals (including mylonite/slickensides) |
Minerals
Click on a button to filter by elements. Green = must include. Black = must exclude. Mineral names listed in bold are exclusively known from this paragenetic mode.
| Mineral | Formula | Crystal System |
|---|---|---|
| Armalcolite | (Mg,Fe2+)Ti2O5 | Orthorhombic |
| Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 | Monoclinic |
| Carmichaelite | (Ti,Cr,Fe)[O2-x(OH)x] | Monoclinic |
| Cordierite | (Mg,Fe)2Al3(AlSi5O18) | Orthorhombic |
| Corundum | Al2O3 | Trigonal |
| Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 | Monoclinic |
| Freudenbergite | Na2(Ti,Fe)8O16 | Monoclinic |
| Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 | Monoclinic |
| Ilmenite | Fe2+TiO3 | Trigonal |
| Lawsonite | CaAl2(Si2O7)(OH)2·H2O | Orthorhombic |
| Nixonite | Na2Ti6O13 | Monoclinic |
| Perovskite | CaTiO3 | Orthorhombic |
| Priderite | K(Ti4+7Fe3+)O16 | Tetragonal |
| Rutile | TiO2 | Tetragonal |
| Sekaninaite | (Fe,Mg)2Al3(AlSi5O18) | Orthorhombic |
| Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) | Orthorhombic |
| Element | Count | Percent | |
|---|---|---|---|
| H | Hydrogen | 6 | 37.50% |
| O | Oxygen | 16 | 100.00% |
| Na | Sodium | 4 | 25.00% |
| Mg | Magnesium | 6 | 37.50% |
| Al | Aluminium | 7 | 43.75% |
| Si | Silicon | 7 | 43.75% |
| K | Potassium | 1 | 6.25% |
| Ca | Calcium | 4 | 25.00% |
| Ti | Titanium | 8 | 50.00% |
| Cr | Chromium | 1 | 6.25% |
| Fe | Iron | 7 | 43.75% |
References
Hazen, Robert M., Morrison, Shaunna M. (2022) On the paragenetic modes of minerals: A mineral evolution perspective. American Mineralogist, 107 (7) 1262-1287 doi:10.2138/am-2022-8099
