South Shetland Islands Volcanic Arc (Antarctica): Petrological and geochemical implications for their magma evolution

• Main Authors: Минералогия И Петрология София, Borislav K. Kamenov
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2008
• Subjects: Livingston Island; South Shetland Islands; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.4786; http://www.geology.bas.bg/mineralogy/gmp_files/gmp46/kamenov.pdf

Livingston Island are relics of the Mesozoic-Cenozoic magmatic arc of South Shetlands and their chronological, petrological and geochemical evolution is still not clarified unequivocally. The present contribution attempts to elucidate the dyke chronological sequences, mineral composition, nomenclature influenced by alterations, magma serial affinities, geochemical peculiarities, magma sources and magma evolution. Dykes are assigned to six magmatic pulses deduced out of their crosscutting relationships. The published K-Ar and 40Ar/39Ar ages in combination with our new field, petrological and geochemical results led to the distinction of three magmatic stages of dyke emplacement in