Long-Term Geological Evolution and Mass-Flow Balance of the South-Central Andes

摘要: In south-central Chile (36–42° S), the western edge of South America has evolved as an active margin since Pennsylvanian (∼305 Ma). Active margins are considered sites both potential continental growth and destruction. Continental in a setting can proceed by accretionary offscraping juvenile material from oceanic plate magmatic additions, whereas net mass loss be achieved subducting material, delamination, chemical weathering. southcentral Chile, evolution was never interrupted island-arc accretion or collision. Thus, area provides excellent field laboratory for studying flux through long-term, persistent, convergent-margin system.