TY - JOUR
T1 - Metasomatism and partial melting in a subduction complex
T2 - Catalina schist, southern California.
AU - Sorensen, S. S.
AU - Barton, M. D.
PY - 1987
Y1 - 1987
N2 - Migmatitic blocks containing leucocratic zones, veins and pods with albitic plagioclase + quartz + muscovite are found in the amphibolite unit of the Catalina schist, a subduction-zone metamorphic terrain. Field relations, mineral and bulk chemistry, phase-equilibrium along with element partitioning and fluid inclusion data, suggest that the migmatites and dykes are partial melts of variably metasomatized amphibolites at P approx 8-11 kbar and T approx 640-750oC, in the presence of low-salinity aqueous fluid. The Catalina metamorphism occurred at much shallower levels than those inferred for subduction-related magmatism and is one of multi-stage, slab-derived metasomatic contamination of the mantle in the 'hanging wall' of a subduction zone. -L.C.H.Dept. of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington DC 20560, USA.
AB - Migmatitic blocks containing leucocratic zones, veins and pods with albitic plagioclase + quartz + muscovite are found in the amphibolite unit of the Catalina schist, a subduction-zone metamorphic terrain. Field relations, mineral and bulk chemistry, phase-equilibrium along with element partitioning and fluid inclusion data, suggest that the migmatites and dykes are partial melts of variably metasomatized amphibolites at P approx 8-11 kbar and T approx 640-750oC, in the presence of low-salinity aqueous fluid. The Catalina metamorphism occurred at much shallower levels than those inferred for subduction-related magmatism and is one of multi-stage, slab-derived metasomatic contamination of the mantle in the 'hanging wall' of a subduction zone. -L.C.H.Dept. of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington DC 20560, USA.
UR - http://www.scopus.com/inward/record.url?scp=84879882009&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879882009&partnerID=8YFLogxK
U2 - 10.1130/0091-7613(1987)15<115:MAPMIA>2.0.CO;2
DO - 10.1130/0091-7613(1987)15<115:MAPMIA>2.0.CO;2
M3 - Article
AN - SCOPUS:84879882009
VL - 15
SP - 115
EP - 118
JO - Geology
JF - Geology
SN - 0091-7613
IS - 2
ER -