Magmatic plumbing of a large Permian caldera exposed to a depth of 25 km

作者:Quick J E*; Sinigoi S; Peressini G; Demarchi G; Wooden J L; Sbisa A
来源:Geology, 2009, 37(7): 603-606.
DOI:10.1130/G30003A.1

摘要

We report evidence for a >= 13-km-diameter Permian caldera associated with a renowned section through the continental crust comprising the Ivrea-Verbano Zone and Serie dei Laghi of northwest Italy. Correlation of ages of volcanic and middle to deep crustal plutonic rocks suggests that they constitute an unprecedented exposure of a subcaldera magmatic plumbing system to a depth of 25 km, and points to a cause and effect link between intrusion of mantle-derived basalt in the deep crust, and large-scale, silicic volcanism.