The Mull Paleocene dykes: some insights into the nature of major dyke swarms

摘要: At about 1000 km long and with a magmatic volume exceeding 850 km3, the Paleocene Mull Dyke Swarm qualifies as giant dyke swarm. As such, it offers important insights into nature of such swarms. Magma flowage laterally from Central Complex is supported by evidence recent magma in rift-related volcanic areas. Conduits were frequently used more than one pulse at different times. Pre-heating conduits basaltic enabled salic magmas to propagate for >400 km Mull. The Southern Upland Fault had major influence on propagation southern sector swarm, variably arresting migration or diverting vertically laterally, case 16 km laterally. A significant role crustal heterogeneity controlling dynamics advocated. Recent models point interactions between dykes adjacent central complexes. swarm can potentially contribute information evolution plumbing system, formation compositional zoning input chamber rupture.