Are the Taitao granites formed due to subduction of the Chile ridge?

Anma, Ryo; Armstrong, Richard; Orihashi, Yuji; Ike, Shin ichi; Shin, Ki Cheol; Kon, Yoshiaki; Komiya, Tsuyoshi; Ota, Tsutomu; Kagashima, Shin Ichi; Shibuya, Takazo; Yamamoto, Shinji; Veloso, Eugenio E.; Fanning, Christopher; Hervé, Francisco

doi:10.1016/j.lithos.2009.05.018

Cited by 49 publications

(49 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Subduction erosion of Miocene to Pliocene accretionary prism and/ or Jurassic sedimentary basement might have occurred during the ridge subduction (Bourgois et al, 1996). However, few recycled zircons were recognized in the Taitao granitoids (Anma et al, 2009;Anma and Orihashi, 2013). Of the possible source materials, only subducted MORB is available.…”

Section: Discussionmentioning

confidence: 99%

“…84-3.97, 5.09-5.17, 5.12, 4.88 and 5.70 Ma for granitoids from Cabo Raper, Seno Hoppner, Estero Cono, Bahia Barrientos, and Tres Montes granitoids, respectively (Hervé et al, 2003;Anma et al, 2009). Anma et al (2009) and Anma and Orihashi (2013) concluded using U-Pb age distributions of granitoids and sediments that the intrusion Taitao granitoids were all related to the ridge collision at 6 Ma (Cande et al, 1987), subsequent subducted ridge downward and the emplacement of the Taitao ophiolite.…”

Section: Geological Settingmentioning

confidence: 99%

“…In an attempt to establish a geochronological framework, Anma et al (2009) perform major and trace element analyses for a few samples for each pluton. Their data show bimodal compositions among the Taitao granitoids.…”

Section: Geochemical Compositionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2013

Self Cite

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2013

Self Cite

View full text Add to dashboard Cite

“…The sheeted dikes were thermally metamorphosed (Shibuya et al, 2007) by the intrusion of the Seno Hoppner pluton (SH in Fig. 1b) (Anma et al, 2009a). Anma et al (2009a) reported U-Pb ages of zircons separated from clastic sediments that were interbedded in the volcanic rocks and concluded that their deposition postdates ~4.9 Ma.…”

Section: Geology Of the Taitao Peninsulamentioning

confidence: 99%

“…1b) (Anma et al, 2009a). Anma et al (2009a) reported U-Pb ages of zircons separated from clastic sediments that were interbedded in the volcanic rocks and concluded that their deposition postdates ~4.9 Ma. Only five zircon grains out of 24 yielded ages older than Late Miocene, and all were younger than 290 Ma.…”

Section: Geology Of the Taitao Peninsulamentioning

confidence: 99%

Shallow-depth melt eduction due to ridge subduction: LA-ICPMS U-Pb igneous and detrital zircon ages from the Chile Triple Junction and the Taitao Peninsula, Chilean Patagonia

Anma

Orihashi

2013

Geochem. J.

Self Cite

View full text Add to dashboard Cite

Lower plate deformation at the Chile Triple Junction from the paleomagnetic record (45°30′S-46°S)

et al. 2015

View full text Add to dashboard Cite

During the Chile Triple Junction (CTJ) cruise, geophysical surveys were conducted between 45°S and 48°S, in the region of the Chile Triple Junction (CTJ), where the Nazca and Antarctica Plates are subducting beneath the South American Plate. Near the CTJ, the South Chile Rise (SCR), which separates the Nazca and Antarctica lower plates, consists of three spreading segments trending~N160°, separated by a series of parallel fracture zones. The active spreading centers of the three segments consist of grabens with various widths and depths, bounded by steep fault scarps. We provide robust data showing that the SCR recorded remote and long-term effects of ridge subduction far from the subduction front. Magnetic profiles, multibeam bathymetric, and seismic data were acquired at intervals of 13 km along a N80°E direction across the SCR during the CTJ cruise of R/V L'Atalante. Deformation of the oceanic lithosphere includes (1) a segmentation of the spreading axes along strike, (2) some ridge jumps, and (3) local constriction and changes in trend of the fracture zone valleys. Off-axis volcanism is observed in places that may suggest a link with an abnormal stress field induced by ridge subduction. The tectonic and volcanic anomalies, which occurred in response to the subduction of the SCR1 axis, may be correlated with geochemical anomalies and slab fragmentation recognized by previous works.

show abstract

Are the Taitao granites formed due to subduction of the Chile ridge?

Cited by 49 publications

References 45 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

Shallow-depth melt eduction due to ridge subduction: LA-ICPMS U-Pb igneous and detrital zircon ages from the Chile Triple Junction and the Taitao Peninsula, Chilean Patagonia

Lower plate deformation at the Chile Triple Junction from the paleomagnetic record (45°30′S-46°S)

Contact Info

Product

Resources

About