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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...
29Si MAS NMR systematics of calcic and sodic-calcic amphiboles
29Si MAS NMR systematics calcic sodic-calcic amphiboles
2012/3/30
We report the compositional systematics of the 29 Si MAS NMR spectra of richterite,[A](Na,K,Rb)1(Na,Ca,Sr)2Mg5Si8O22 (OH,F)2; pargasite, NaCa2Mg4AlSi6Al2O2(OH)2; and fluor-edenite, NaCa2Mg5Si7AlO22F2....
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...