Electrostatic calculations estimated the energy of hypothetical ion clustering in intermediate plagioclase feldspars. The calculated energy appears too great to allow segregation of Ca and Na atoms into domains upon annealing without a corresponding movement of A1 and Si from an original disordered structure. The calculated energy may be sufficiently small that Ca and Na atoms can disorder part...

[1] A new method for dating well-bleached sediments is presented, with results for thirteen samples from China. The method uses an isochron constructed from the measurement of natural radiation doses received by potassium-feldspar grains in a range of grain sizes using the infrared stimulated luminescence (IRSL) signal. The age of deposition of the sediment is calculated from this isochron and ...

STUDY. H. Chennaoui Aoudjehane, A. Jambon and O. Boudouma, Université Hassan II Aïn Chock, Faculté des Sciences, Equipe Géoressources, BP 5366 Maârif Casablanca Morocco (e-mail : [email protected]), Université Pierre et Marie Curie-Paris6 Laboratoire MAGIE, Case 110, 4 place Jussieu, 75252 Paris, France (email: [email protected]), Université Pierre et Marie Curie-Paris6 Service de micros...

The analysis of the hyperspectral image is an important method used in mineral detection. A map Feldspar will produced for study area, which lies to west holy province Karbala and limited that download from USGS website (type EO-1 satellite) , by using Spectral Angle Mapper (SAM) technique Erdas software, based on calculating spectral reflection curve any point feldspar available library softwa...