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Nomenclature of the amphibole supergroup
Amphibole nomenclature classification chemical composition crystal chemistry
2013/12/6
A new classification and nomenclature scheme for the amphibole-supergroup minerals is described, based on the general formula AB2C5T8O22W2, where A = o, Na, K, Ca, Pb, Li; B = Na, Ca, Mn2+, Fe2+, Mg, ...
New Constraints from Pb-Evaporation Zircon Ages of the Méiganga Amphibole-Biotite Gneiss, Central Cameroon, on Proterozoic Crustal Evolution
Metasediment 207Pb/206Pb Ages Crustal Evolution
2013/3/6
The amphibole biotite gneiss (ABGn) in the Méiganga area forms part of a meta volcano-sedimentary sequence of the Adamawa Yade domain (AYD), Central African Fold Belt (CAFB). This sequence shows affin...
Metamorphic conditions across the Seve-Köli Nappe boundary,southeastern Trondheim region,Norwegian Caledonides:Comparison of garnet-biotite thermometry and amphibole chemistry
Metamorphic conditions Seve-Kö li Nappe boundary garnet-biotite thermometry amphibole chemistry
2009/12/3
Rocks of the lower Seve Nappe and overlying Köli Nappes are exposed by a domal structure in the Einunnfjellet-Savalen area, southeastern Trondheim region, south-central Norway. In a traverse acro...
Experimental phase-equilibrium study of Al- and Ti-contents of calcic amphibole in MORB--A semiquantitative thermobarometer
Experimental phase-equilibrium Al- and Ti-contents calcic amphibole MORB--A semiquantitative thermobarometer
2012/4/1
Calcic amphiboles were synthesized from a natural mid-ocean ridge basalt (MORB) in 39 experiments representing 24 sets of pressure-temperature ( P -T ) conditions ranging from 650?50 8C, 0.8?.2 GPa, a...
A new hyper-calcic amphibole with Ca at the A site: Fluor-cannilloite from Pargas, Finland
hyper-calcic amphibole Ca Fluor-cannilloite Pargas Finland
2012/4/6
Electron microprobe analysis ofamphiboles from Pargas, Finland, shows upto 2.42 Ca apfu (atoms per formula unit), far in excess ofthe usual maximum value of 2.00 Caapfu observed in amphiboles. The mos...
Cl-rich biotite and amphibole from Black Rock Forest, Cornwall, New York
Cl-rich biotite amphibole Black Rock Forest
2012/4/5
Biotite and amphibole containing up to 4.6 and 5.1 wt%Cl,respectively, are found in gneisses from BlackRock Forest, located within the Hudson Highlands ofNewYork. The area wasmetamorphosed to granulit...
Fluor-ferro-leakeite, NaNa2(Fe2+2Fe3+2Li)Si8O22 F2, a new alkali amphibole from the Canada Pinabete pluton, Questa, New Mexico, U.S.A
Fluor-ferro-leakeite NaNa2(Fe2+2Fe3+2Li)Si8O22 F2 alkali amphibole Canada Pinabete pluton
2012/4/5
Fluor-ferro-leakeite is anewamphibole speciesfrom the CanadaPinabetepluton,Ques-ta, NewMexico,U.S.A.;it occursin association withquartz, alkali feldspar, acmite, il-menite,and zircon. It forms asanhed...
Montmorillonite Pseudomorphs after Amphibole from Melbourne, Australia
Montmorillonite Pseudomorphs Amphibole
2012/2/13
Well developed smectite “crystals” up to 10 mm long, which probably are pseudomorphic after titaniferous hornblende phenocrysts, are present in a weathered dike in a Melbourne clay pit. The pseudomorp...