The time-space distribution of Eocene to Miocene magmatism in the central Peruvian polymetallic province and its metallogenetic implications

Bissig, Thomas; Ullrich, Thomas; Tosdal, Richard M.; Friedman, Richard M.; Ebert, Shane

doi:10.1016/j.jsames.2008.03.004

Cited by 32 publications

(23 citation statements)

References 51 publications

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“…A younger magmatic episode in Eocene to Miocene times encompasses smaller batholiths that intruded the folded strata of the Marañon fold-and-thrust belt, the Central Highlands and even the western rim of the Eastern Cordillera ( Figure 5; see also [69] and references therein). The Cordillera Blanca Batholith, located near Huaraz in the Northern part of the Western Cordillera ( Figure 5), is the largest intrusive body of this Cenozoic magmatic arc.…”

Section: Magmatismmentioning

confidence: 99%

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Mesozoic–Cenozoic Evolution of the Western Margin of South America: Case Study of the Peruvian Andes

Pfiffner

Gonzalez

2013

Geosciences

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Based on the structural style and physiographic criteria, the Central Andes of Peru can be divided into segments running parallel to the Pacific coast. The westernmost segment, the Coastal Belt, consists of a Late Jurassic–Cretaceous volcanic arc sequence that was accreted to the South American craton in Cretaceous times. The Mesozoic strata of the adjacent Western Cordillera represent an ENE-vergent fold-and-thrust belt that formed in Eocene times. Tight upright folds developed above a shallow detachment horizon in the West, while more open folds formed above a deeper detachment horizon towards the East and in the neighboring Central Highlands. A completely different style with steeply dipping reverse faults and open folds affecting the Neoproterozoic crystalline basement is typical for the Eastern Cordillera. The Subandean Zone is characterized by mainly NE-vergent imbricate thrusting which occurred in Neogene times. A quantitative estimate of the shortening of the orogen obtained from balanced cross-sections indicates a total shortening of 120–150 km (24%–27%). This shortening was coevel with the Neogene westward drift of South America, occurred at rates between 3 and 4.7 mm/year and was responsible for the high elevation of the Peruvian Andes

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Section: Magmatismmentioning

confidence: 99%

“…Late Eocene to Pleistocene magmatism is present throughout the Western and Eastern Cordillera [21,69,72,84] as witnessed by several large intrusive bodies and small plugs that cut the various fold structures.…”

Section: Geological Structurementioning

confidence: 99%

Mesozoic–Cenozoic Evolution of the Western Margin of South America: Case Study of the Peruvian Andes

Pfiffner

Gonzalez

2013

Geosciences

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“… Mamani et al [2010] indicate a widening of the volcanic arc in southern Peru starting at 45 Ma. Arc activity shut off above the flat‐slab, first in Peru, then Bolivia and Chile, diachronously flattening from north to south [ Bissig et al , 2008; Lahsen , 1982]. Arriagada et al [2008] suggested that the western margin of South America was nearly straight prior to the onset of shortening and tectonic block rotations that have resulted in the present‐day Bolivian Orocline.…”

Section: Central Andean Tectonics and The Influence Of South Americanmentioning

confidence: 99%

Nazca–South America interactions and the late Eocene–late Oligocene flat‐slab episode in the central Andes

2012

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The most prominent features of the Andean range are the Altiplano and Puna plateaus, which were constructed by crustal shortening and uplift over the past ∼45 Myr. The early construction of these plateaus may have controlled subsequent growth of the orogen. Proposed models have suggested that an abrupt acceleration in relative motion between the Nazca plate and the South American plate at ∼30 Ma may have led to compression of the continent. However, the major plate motion change occurred at 25–23 Ma, and paleomagnetic rotations and crustal shortening of the Andean forearc require that the Arica Bend formed prior to about 25 Ma. Inferred history of flat‐slab subduction along the Altiplano section of the Andean margin and the structure of the adjacent South American cratonic shield combine to suggest an alternate scenario, based partly upon geodynamic models of oceanic‐continental plate interactions in subduction zones. We propose that central Andean tectonism may have been controlled by two distinct regimes of subduction: (1) oblique subduction along the central Andean margin during the late Eocene and Oligocene accompanied by downdip alignment with the center of the Amazonian Shield (flat‐slab activity in this phase of orogenesis may have been caused by a combination of cratonic root enhanced tectonics and oceanic plateau subduction) and (2) an abrupt transition to trench‐normal subduction after ∼25 Ma toward the more distal São Francisco Craton was accompanied by a return to normal angle subduction. Similar interactions are hypothesized to have occurred during the Laramide Orogeny in western North America.

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“…1). The overwhelming majority of high-sulfidation epithermal deposits are Miocene or younger, and are located in segments of the Andean arc where magmatism is now absent or subdued (e.g., Bissig et al, 2008;Kay and Mpodozis, 2001;Rosenbaum et al, 2005). The lack of magmatism is attributed to two zones of shallow angle subduction of the Nazca plate below the South American continent in the Central Andes (the Pampean flat slab in northern Chile and the Peruvian flat slab in central and northern Peru: Ramos, 2009) as well as the Bucaramanga flat slab where Caribbean plate is subducting below northern Colombia (Vargas and Mann, 2013).…”

Section: Distribution Of High-sulfidation Deposits In the Andesmentioning

confidence: 99%

“…The geodynamic setting of late Miocene high-sulfidation deposits of the Cordillera Occidental also differs from the current flat slab segments in that magmatism is associated with contraction of the arc due to slab steepening rather than arc-broadening and cessation related to shallowing subuduction angles as observed in the Pampean and Peruvian flat slab segments (cf. Bissig et al, 2003Bissig et al, , 2008Kay and Mpodozis, 2001;Sandeman et al, 1995).…”

Section: Late Miocene High-sulfidation Epithermal Au Deposits Of the mentioning

confidence: 99%

Physiographic and tectonic settings of high-sulfidation epithermal gold–silver deposits of the Andes and their controls on mineralizing processes

Bissig

Clark

Rainbow

et al. 2015

Ore Geology Reviews

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The time-space distribution of Eocene to Miocene magmatism in the central Peruvian polymetallic province and its metallogenetic implications

Cited by 32 publications

References 51 publications

Mesozoic–Cenozoic Evolution of the Western Margin of South America: Case Study of the Peruvian Andes

Mesozoic–Cenozoic Evolution of the Western Margin of South America: Case Study of the Peruvian Andes

Nazca–South America interactions and the late Eocene–late Oligocene flat‐slab episode in the central Andes

Physiographic and tectonic settings of high-sulfidation epithermal gold–silver deposits of the Andes and their controls on mineralizing processes

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