Spinel + plagioclase symplectites in pelitic metamorphic rocks have been reported from many localities. We report detail an occurrence of this texture Tenmondai Rock, Lützow-Holm Complex, East Antarctica. This is produced by the following reaction; garnet sillimanite = spinel plagioclase. can be described as two net-transfer reactions; 5Grs Alm 12Als 3Hc 15An, and Prp 3Spl 15An. propose new geo...

introduction the area studied is located north of azna (lorestan province) in a small portion of the sanandaj – sirjan structural zone (mohajjel et al., 2003).this area is part of the zagros orogenic belt, formed by the opening and closure of neotethyan ocean. from ne to sw, it consists of three parallel tectonic regions: the orumieh-dokhtar magmatic belt, the sanandaj-sirjan structural zone an...

Adsorption of lead(II) as a major heavy metal pollutant onto nano-adsorbents of Andalusite, Kyanite and Sillimanite was studied in a batch system. Nano­-adsorbents were prepared via crushing, using a planetary ball mill and then characterized by different analyses such as: SEM, XRD, XRF and FT-IR. Major factors affecting the adsorption process were studied including pH, adsorbents dosage, initi...