Young mafic back arc volcanic rocks as indicators of continental lithospheric delamination beneath the Argentine Puna Plateau, central Andes

1994 ◽  
Vol 99 (B12) ◽  
pp. 24323-24339 ◽  
Author(s):  
Suzanne Mahlburg Kay ◽  
Beatriz Coira ◽  
Jose Viramonte
Keyword(s):  
Volcanic Rocks ◽  
Central Andes ◽  
Puna Plateau ◽  
Plateau Central ◽  
Back Arc

scholarly journals Multi-stage Evolution of Late Neogene Mantle-derived Magmas from the Central Andes Back-arc in the Southern Puna Plateau of Argentina

2013 ◽  
Vol 54 (10) ◽  
pp. 1963-1995 ◽  
Author(s):  
A. Risse ◽  
R. B. Trumbull ◽  
S. M. Kay ◽  
B. Coira ◽  
R. L. Romer
Keyword(s):  
Central Andes ◽  
Multi Stage ◽  
Late Neogene ◽  
Puna Plateau ◽  
Back Arc

Early Cenozoic uplift of the Puna Plateau, Central Andes, based on stable isotope paleoaltimetry of hydrated volcanic glass

Geology ◽  
2014 ◽  
Vol 42 (5) ◽  
pp. 447-450 ◽  
Author(s):  
R. R. Canavan ◽  
B. Carrapa ◽  
M. T. Clementz ◽  
J. Quade ◽  
P. G. DeCelles ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Volcanic Glass ◽  
Central Andes ◽  
Puna Plateau ◽  
Plateau Central ◽  
Early Cenozoic

Deformation history of the Puna plateau, Central Andes of northwestern Argentina

2020 ◽  
Vol 140 ◽  
pp. 104133
Author(s):  
Susana Henríquez ◽  
Peter G. DeCelles ◽  
Bárbara Carrapa ◽  
Amanda N. Hughes ◽  
George H. Davis ◽  
...  
Keyword(s):  
Central Andes ◽  
Deformation History ◽  
Northwestern Argentina ◽  
Puna Plateau ◽  
History Of ◽  
Plateau Central

scholarly journals Southern Central Andes Neogene magmatism over the Pampean Flat Slab: implications on crustal and slab melts contribution to magma generation in Precordillera, Western Argentina

2017 ◽  
Vol 44 (3) ◽  
pp. 249 ◽  
Author(s):  
Stella Poma ◽  
Adriana Ramos ◽  
Vanesa D. Litvak ◽  
Sonia Quenardelle ◽  
Emma B. Maisonnave ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Central Andes ◽  
Progressive Increase ◽  
Geochemical Data ◽  
Transitional Region ◽  
Continuous Increase ◽  
Volcanic Arc ◽  
Age Variations ◽  
Southern Central ◽  
Back Arc

A Miocene to Pliocene (13 to 4.6 Ma) mostly pyroclastic sequence is exposed along the Iglesia Valley, to the east of the former main volcanic arc. This area is a transitional region between Cordillera Frontal and Precordillera, over the f lat slab segment of the Southern Central Andes, at 29º30’ S to 30º00’ S. New radiometric ages, geochemical data, petrography and field relationships are evaluated to establish differences and similarities between Miocene arcrelated sequences across the main arc and its expansion towards a back arc position, in western Precordillera. Analyzed rocks have a magmatic arc signature partially like the former main volcanic arc to the west. The Iglesia Valley rocks are LREE-enriched (La/Sm: 3.7-6.5) with respect to HREE (Sm/Yb: 2.2-6.0) and define patterns with a pronounced slope. Sm/Yb ratios generally increase with time, as pressures increase, with retention of HREE in residual mineralogy, particularly garnet at Sm/Yb>4. Volcanic activity in Cordillera Frontal and the volcanic-volcaniclastic expression in Precordillera show a continuous increase in the La/Yb ratio with decreasing age. Variations in the residual mineralphase equilibrating with magmas would be related to the progressive increase in crustal thickness due to the tectonic compressive regime resulting from shallow subduction since Middle Miocene. The data presented suggest that the arc magmatic activity during the Miocene was expanded notably to the East in relation to the location of the main arc at Valle del Cura, in Cordillera Frontal. The extensive amplitude of the volcanic arc activity is indicative of the slab gradual f lattening. Particularly, the mantle-derived magmas from Lomas del Campanario Formation (Western Precordillera) are enriched by subduction related f luids but also by crustal components. It is interpreted that the cause of the geochemical differences between the back arc position rocks and the main arc lay in the heterogeneous composition of the underlying continental crust involved in both locations. Presence of volcanic rocks with adakitic geochemical affinity probably ref lect astenospheric-derived melts that interacted through a heterogeneous and thickened crust toward the surface.

Corrigendum to “Deformation history of the Puna plateau, Central Andes of northwestern Argentina” [J. Struct. Geol. 140 (2020) 104133]

2021 ◽  
pp. 104245
Author(s):  
Susana Henríquez ◽  
Peter G. DeCelles ◽  
Bárbara Carrapa ◽  
Amanda N. Hughes ◽  
George H. Davis ◽  
...  
Keyword(s):  
Central Andes ◽  
Deformation History ◽  
Northwestern Argentina ◽  
Puna Plateau ◽  
History Of ◽  
Plateau Central ◽  
Struct Geol

Sedimentary record of regional deformation and dynamics of the thick-skinned southern Puna Plateau, central Andes (26–27°S)

2016 ◽  
Vol 433 ◽  
pp. 317-325 ◽  
Author(s):  
Renjie Zhou ◽  
Lindsay M. Schoenbohm ◽  
Edward R. Sobel ◽  
Barbara Carrapa ◽  
Donald W. Davis
Keyword(s):  
Central Andes ◽  
Sedimentary Record ◽  
Regional Deformation ◽  
Puna Plateau ◽  
Plateau Central

Mantle-drip magmatism beneath the Altiplano-Puna plateau, central Andes

Geology ◽  
2013 ◽  
Vol 41 (8) ◽  
pp. 915-918 ◽  
Author(s):  
M.N. Ducea ◽  
A.C. Seclaman ◽  
K.E. Murray ◽  
D. Jianu ◽  
L.M. Schoenbohm
Keyword(s):  
Central Andes ◽  
Puna Plateau ◽  
Plateau Central
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