New geochemical constraints for the origin of ridge-subduction-related plutonic and volcanic suites from the Chile Triple Junction (Taitao Peninsula and Site 862, LEG ODP141 on the Taitao Ridge)

Guivel, C.; Lagabrielle, Yves; Bourgois, Jacques; Maury, René C.; Fourcade, Serge; Martin, Hervé; Arnaud, Nicolas

doi:10.1016/s0040-1951(99)00160-2

Cited by 110 publications

(71 citation statements)

References 36 publications

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“…1; Cande et al, 1987;Guivel et al, 1999). To the north of the junction, the Nazca Plate is subducting beneath the South American Plate at a rate of 8-9 cm/year.…”

Section: Geological Settingmentioning

confidence: 99%

“…However, their Sr content and [La/ Yb] N values are lower than those of typical HREEdepleted Archean TTG. Guivel et al (1999) evaluated the chemical compositions of the Cabo Raper, Seno Hoppner and Tres Montes plutons, and reported that the Cabo Raper and Tres Montes granitoid plutons possess tonalite and granodiorite affinity, whereas the Seno Hoppner pluton has trondhjemitegranite composition. They concluded that the Seno Hoppner pluton display characteristics of typical calcalkaline series, different from the Cabo Raper and Tres Montes plutons.…”

Section: Geochemical Compositionmentioning

confidence: 99%

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Petrogenesis of the ridge subduction-related granitoids from the Taitao Peninsula, Chile Triple Junction Area

et al. 2013

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“…1; Cande et al, 1987;Guivel et al, 1999). To the north of the junction, the Nazca Plate is subducting beneath the South American Plate at a rate of 8-9 cm/year.…”

Section: Geological Settingmentioning

confidence: 99%

Section: Geochemical Compositionmentioning

confidence: 99%

Petrogenesis of the ridge subduction-related granitoids from the Taitao Peninsula, Chile Triple Junction Area

et al. 2013

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“…The Chile Margin Unit is composed of thick deposits of highly vesicular pillow lavas and pillow breccias (Bourgois et al, 1993;Nelson et al, 1993;Lagabrielle et al, 2000) interbedded with conglomerates and sandstones. According to Guivel et al (1996Guivel et al ( , 1999 this unit was emplaced close to its actual location, and perhaps as a result of the counterclockwise rotation of the ophiolite package (Veloso et al, 2005).…”

Section: The Brittle Deformation Of the Taitao Ophiolitementioning

confidence: 96%

“…1b). All these rock units are northward tilted (Nelson et al, 1993;Lagabrielle et al, 2000;Veloso et al, 2005) and surrounded by young plutonic intrusions (Mpodozis et al, 1985;Lagabrielle et al, 1994;Guivel et al, 1996Guivel et al, , 1999Hervé et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Ophiolite Emplacement and the Effects of the Subduction of the Active Chile Ridge System: Heterogeneous Paleostress Regimes Recorded in the Taitao Ophiolite (Southern Chile)

Veloso

Anma

Yamaji

2009

AndGeo

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ABSTRACT. The repeated north and southward migration of the Chile Triple junction, offshore the Península de Taitao, is expected to have imposed contrasting stress fi elds in the forearc for the last 6 Ma because of changes in convergence direction and rate of subducting plates. NNW-SSE to E-W and minor NE-SW striking brittle faults developed in the plutonic units of the Mio-Pliocene Taitao Ophiolite, whereas NNE-SSW and minor NW-SE trending faults developed in its eastern border (Bahía Barrientos fault-zone). These brittle faults are studied to elucidate the style of ophiolite emplacement and the tectonic effects resulting from the alternated migration of the Chile Triple junction in the area. Analyses of heterogeneous fault-slip data on both areas suggest that faults were activated by different stress fi elds. Two different compressional stress fi elds were identifi ed in the plutonic units (A and B), whereas three different stress fi elds, ranging from compressional to strike-slip, were identifi ed in the Bahía Barrientos fault-zone (C, D and E). Calculated directions of σ 1 axes for A, C, D and E solutions are mostly E-W trending, roughly similar to the convergence direction of subducting plates, whereas that for B solution is counterclockwise rotated ca. 60° with respect to the previous E-W trend. Brittle structures related to solution B were attributed to an early deformation of the ophiolite, most probably developed shortly after its emplacement (ca. 6 Ma). These structures were further counterclockwise rotated, while new structures (related to solution A) developed in the plutonic units in order to absorb the continuous deformation. In the eastern margin of the ophiolite, the stress fi eld divided into compressional and strike-slip components. During periods of relatively strong compression (fast subduction of the Nazca plate), the fault-zone experienced well defi ned compressional and strike-slip movements (solutions C and D). In contrast, during periods of relatively weak compression (slow subduction of the Antarctic plate), the fault-zone experienced a complex mixture of thrust and strike-slip movements (solution E). Thus, the wide range of calculated stress ratios for all solutions could be attributed to the alternated change in convergent velocity of the subducting plates beneath the Taitao area. RESUMEN.Emplazamiento de ofi olitas y los efectos de la subducción de la dorsal activa de Chile: Regímenes heterogéneos de paleostress registrados en la Ofi olita Taitao (Sur de Chile). Es esperable que la repetida migración norte-sur del Punto Triple de Chile cercana a la costa de la Península de Taitao haya impuesto campos de esfuerzos distintos en el antearco por los últimos 6 Ma debido a cambios en la dirección de convergencia y tasa de subducción. Fallas con rumbos NNO-SSE y E-O y otras menores con rumbos NE-SO se desarrollaron en las unidades plutónicas de la Ofi olita Miocena-Pliocena de Taitao, mientras que fallas con rumbos NNE-SSO y otras menores con rumbos NO-SE se desarrollaron en el borde Est...

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“…In subdution zones, the mantle rocks and the coeval granites have therefore recorded abundant information regarding the crustal growth and differentiation of continental crust (Kamei et al, 2004;Karsli et al, 2010). However, the production of the subdution-related magmatic rocks was always attributed to distinct dynamic mechanisms, including slab break-off (Davies and von Blanckenburg, 1995), ridge subduction (Abratis and Worner, 2001;Guivel et al, 1999), slab tearing (Guivel et al, 2006;Pallares et al, 2007), or slab roll-back (Kay and Mpodozis, 2001;Ramos and Folguera, 2009). All of these geodynamic processes are closely corresponding to the upwelling of hot asthenosphere mantle, which provides enough heat for partial melting of the subducted oceanic crust and marine sediments, the overlying subcontinental lithospheric mantle and low crust.…”

Section: Introductionmentioning

confidence: 99%

Middle Jurassic MORB-type gabbro, high-Mg diorite, calc-alkaline diorite and granodiorite in the Ando area, central Tibet: Evidence for a slab roll-back of the Bangong-Nujiang Ocean

Yan

Long

Wang

et al. 2016

Lithos

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New geochemical constraints for the origin of ridge-subduction-related plutonic and volcanic suites from the Chile Triple Junction (Taitao Peninsula and Site 862, LEG ODP141 on the Taitao Ridge)

Cited by 110 publications

References 36 publications

Petrogenesis of the ridge subduction-related granitoids from the Taitao Peninsula, Chile Triple Junction Area

Petrogenesis of the ridge subduction-related granitoids from the Taitao Peninsula, Chile Triple Junction Area

Ophiolite Emplacement and the Effects of the Subduction of the Active Chile Ridge System: Heterogeneous Paleostress Regimes Recorded in the Taitao Ophiolite (Southern Chile)

Middle Jurassic MORB-type gabbro, high-Mg diorite, calc-alkaline diorite and granodiorite in the Ando area, central Tibet: Evidence for a slab roll-back of the Bangong-Nujiang Ocean

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