Structure of the North Patagonian thick-skinned fold-and-thrust belt, southern central Andes, Argentina (41°–42°S)

2004 ◽  
Vol 18 (1) ◽  
pp. 61-72 ◽  
Author(s):  
R.E. Giacosa ◽  
N. Heredia
Keyword(s):  
Central Andes ◽  
Thrust Belt ◽  
The North ◽  
Fold And Thrust Belt ◽  
Southern Central

scholarly journals Late Cretaceous Uplift in the Malargüe fold-and-thrust belt (35ºS), southern Central Andes of Argentina and Chile

2013 ◽  
Vol 40 (1) ◽  
Author(s):  
Jose Francisco Mescua ◽  
Laura Beatriz Giambiagi ◽  
Victor Alberto Ramos
Keyword(s):  
Late Cretaceous ◽  
Central Andes ◽  
Thrust Belt ◽  
Fold And Thrust Belt ◽  
Southern Central

FEEDBACKS BETWEEN MAGMATISM AND STRESS AND STRAIN FIELDS IN THE MALARGüE FOLD AND THRUST BELT, SOUTHERN CENTRAL ANDES (34º-36ºS)

2017 ◽  
Author(s):  
José F. Mescua ◽  
◽  
Laura Giambiagi ◽  
Laura Giambiagi ◽  
Patricia Sruoga ◽  
...  
Keyword(s):  
Central Andes ◽  
Stress And Strain ◽  
Thrust Belt ◽  
Strain Fields ◽  
Fold And Thrust Belt ◽  
Southern Central

Neogene to Quaternary extensional reactivation of a fold and thrust belt: The Agrio belt in the Southern Central Andes and its relation to the Loncopué trough (38°–39°S)

2010 ◽  
Vol 492 (1-4) ◽  
pp. 279-294 ◽  
Author(s):  
Emilio A. Rojas Vera ◽  
Andrés Folguera ◽  
Gonzalo Zamora Valcarce ◽  
Mario Giménez ◽  
Francisco Ruiz ◽  
...  
Keyword(s):  
Central Andes ◽  
Thrust Belt ◽  
Fold And Thrust Belt ◽  
Southern Central

Neotectonic reactivation of the western section of the Malargüe fold and thrust belt (Tromen volcanic plateau, Southern Central Andes)

Geomorphology ◽  
2015 ◽  
Vol 232 ◽  
pp. 164-181 ◽  
Author(s):  
Lucía Sagripanti ◽  
Emilio A. Rojas Vera ◽  
Guido M. Gianni ◽  
Andrés Folguera ◽  
Jonathan E. Harvey ◽  
...  
Keyword(s):  
Central Andes ◽  
Thrust Belt ◽  
Fold And Thrust Belt ◽  
Southern Central

scholarly journals Timing and extent of late pleistocene glaciation in the arid Central Andes of Argentina and Chile (22°-41°S)

2017 ◽  
Vol 43 (2) ◽  
pp. 697 ◽  
Author(s):  
J. Zech ◽  
C. Terrizzano ◽  
E. García-Morabito ◽  
H. Veit ◽  
R. Zech
Keyword(s):  
Southern Oscillation ◽  
Co2 Concentration ◽  
Late Glacial ◽  
Central Andes ◽  
The North ◽  
Eastern Equatorial Pacific ◽  
Southern Central ◽  
Study Sites ◽  
Increasing Temperature ◽  
Exposure Ages

The arid Central Andes are a key site to study changes in intensity and movement of the three main atmospheric circulation systems over South America: the South American Summer Monsoon (SASM), the Westerlies and the El Niño Southern Oscillation (ENSO). In this semi-arid to arid region glaciers are particularly sensitive to precipitation changes and thus the timing of past glaciation is strongly linked to changes in moisture supply. Surface exposure ages from study sites between 41° and 22°S suggest that glaciers advanced: i) prior to the global Last Glacial Maximum (gLGM) at ~40 ka in the mid (26°- 30°S) and southern Central Andes (35°-41°S), ii) in phase with the gLGM in the northern and southern Central Andes and iii) during the late glacial in the northern Central Andes. Deglaciation started synchronous with the global rise in atmospheric CO2 concentration and increasing temperature starting at ~18 ka. The pre-gLGM glacial advances likely document enhanced precipitation related to the Southern Westerlies, which shifted further to the North at that time than previosuly assumed. During the gLGM glacial advances were favored by decreased temperatures in combination with increased humidity due to a southward shifted Intertropical Convergence Zone (ITCZ) and SASM. During the late-glacial a substantial increase in moisture can be explained by enhanced upper tropospheric easterlies as response to an intensified SASM and sustained La Niña-like conditions over the eastern equatorial Pacific that lead to glacial advances in the northern Central Andes and the lake level highstand Tauca (18-14 ka) on the Altiplano. In the southernmost Central Andes at 39º-41°S, further north at 31°S and in the northernmost Central Andes at 22°S glacial remnants even point to precipitation driven glaciations older than ~115 ka and 260 ka.

scholarly journals Possible Quaternary growth of a hidden anticline at the front of the Jura fold-and-thrust belt: geomorphological constraints from the Forêt de Chaux area, France

2011 ◽  
Vol 182 (4) ◽  
pp. 337-346 ◽  
Author(s):  
Stéphane Molliex ◽  
Olivier Fabbri ◽  
Vincent Bichet ◽  
Herfried Madritsch
Keyword(s):  
Focal Depth ◽  
Fault Reactivation ◽  
Thrust Belt ◽  
Alluvial Deposits ◽  
The North ◽  
Basement Faults ◽  
Fold And Thrust Belt ◽  
Median Position ◽  
Differential Uplift ◽  
River Migration

Abstract This study presents new constraints for Plio-Quaternary (post-2.4 Ma to present-day) anticline growth along the frontal zone of the Jura fold-and-thrust belt, in the Forêt de Chaux area, located 30 km SW of Besançon. The Forêt de Chaux area consists of a N080°E-elongated depression bordered by the Doubs and Loue rivers to the north and south respectively, and filled with Sundgau-type Pliocene alluvial deposits. The upper surface of the Pliocene deposits between the Loue and Doubs rivers is marked by a N065°E-trending ridge crossing the depression in a median position. A differential uplift along this ridge, post-dating the deposition of the gravels (2.4 Ma), is suggested by several geomorphological observations such as the opposite river migration on each side of the ridge as well as variations of drainage geometry and incision intensity. Geological and geophysical subsurface data indicate that the ridge roughly coincides with the axis of an anticline hidden beneath the Pliocene deposits. The observed uplift is presumably related to a post-2.4 Ma anticline growth. The fact that the azimuth of the hidden anticline axis is parallel to the strike of deep-seated Late Paleozoic basement faults and not to the local strike of the thin-skinned Jura structures indicates that the inferred post-Pliocene deformation could possibly be an expression of a recent thick-skinned deformation of the basement of the northern Alpine foreland. The focal depth (15 km) of the February 24th, 2004, Besançon earthquake supports the hypothesis of a basement fault reactivation.

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