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Forestimationsof P-T conditionsofigneousandmetamorphicrocks,Fe incoexisting mineralsiseitherassumedtobezerooriscalculatedfromelectronmicroprobeanalyses (EMPA)baseduponstoichiometryandchargebalance.G...
Thisworkpresentsaproceduredevelopedfortraceelementanalysisusingtheelectron microprobe(EMP).Themethodisdemonstratedbyanalysisofsevenglassesprepared fromreferencerockpowders,withcompositionsofgranite,...
Ahigh-precision electron microprobe(EMP) technique hasbeendeveloped that is ca-pableofanalyzing major,minor,and trace element abundances (Si,Ti,AI,Fe,Mn,Mg, Ca,Na,K,Cl)in hydrous rhyolitic glasses.Th...
The time-dependent loss of NaKa X-ray intensity during electron-beam irradiation of hydrous alkali alumino silicate glasses is apparently moresignificant during the initial few seconds ofbeam exposure...
AnalysisofCain olivine grainscloseto boundaries withCa-richphases is inherently problematic becauseofthe effectsofsecondary X-rayfluorescenceofCafrom the adjoining Ca-richphase. Commercial fluorescenc...
Fifteen samples of palygorskite, from widespread localities,have been investigated. The ubiquitous impurities and exhemely fine grain+ize pose serious problems in many analytical procedures. The elect...
Electron microprobe studies of kaolinite indicate that most of the Fe is evenly distributed throughout the kaolinite and must either be in the structure or occur as very small particles adsorbed on th...

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