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- W2040307509 abstract "The Coastal Batholith consists of about 1000 interlocking plutons and is organized in a systematic way. Its constituent components may be defined as the pluton, the super-unit, and the batholithic segment. The primary level is that of the pluton which may itself be internally zoned by pulses and surges of related magma. Chains of plutons of identical lithology and which have consistent intrusive relationships to other members of the batholith may be traced for hundreds of kilometres. These are referred to as the super-units. The batholithic segment consists of a very large area of the batholith which is comprised of a specific number of super-units. Five segments have been recognised but only two have been mapped in detail: the Lima segment 400 km long and the Arequipa segment 1000 km long. The Lima segment is comprised of eleven units and super-units which are:Pativilcamonzogranite34 m.y.Canas-Sayanmonzogranite60 m.y.Puscaogranodiorite-monzogranite60 m.ySan Jeronimomonzogranite60 m.yLa Minatonalite60 m.yDyke Swarmandesite70 m.yHumayagranodiorite70 m.ySanta Rosatonalite-granodiorite80–90 m.yPacchodiorite-tonalite95 m.yJecuangranodiorite102 m.yPatapgabbro102 m.y The Arequipa segment is comprised of five super-units as follows:Tiabayatonalite-granodiorite80 m.y.Incahuasimonzodiorite95–80 m.y.Pampahuasitonalite95–80 m.yLingamonzodiorite-granodiorite97 m.yPatapgabbro102 m.y Magmatism lasted longer in the Lima segment than it did in the Arequipa segment. The younger members of the Lima segment are more acid and these also build the ring complexes which are confined to that segment. The plutons of the Coastal Batholith are spatially associated with marine volcanics of Cretaceous and Jurassic age and a metallogenic belt of copper, molybdenum and gold is developed in the same zone. A belt of scattered plutons of Tertiary age lies to the east of the batholith and is associated with post-orogenic plateau volcanics and also with the polymetallic metallogenic belt which produces copper, lead, zinc, silver and other metals." @default.
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- W2040307509 date "1982-11-01" @default.
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- W2040307509 title "The segmented Coastal Batholith of Peru: Its relationship to volcanicity and metallogenesis" @default.
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