EVOLUTION: EXAMPLE FROM THE VELASCO DISTRICT, PAMPEANA PEGMATITE PROVINCE, ARGENTINA, AND REVIEW OF WORLDWIDE OCCURRENCES...Miguel Lillo 205 (4000), San Miguel de Tucuman, Argentina ADRIANA HEIMANN§ Department of Geological Sciences...pegmatites of the Velasco district from the Pampeana Pegmatite Province, Argentina, contain varieties of...of beryl from ten pegmatites from the Velasco district were used to identify differences among beryl...chemistry, fractionation, Velasco District, Pampeana Pegmatite Province, Argentina. INTRODUCTION Beryl is a |