scholarly journals Studies in Neotropical Paleobotany. XV. A Mio-Pliocene palynoflora from the Eastern Cordillera, Bolivia: implications for the uplift history of the Central Andes

2001 ◽  
Vol 88 (9) ◽  
pp. 1545-1557 ◽  
Author(s):  
Alan Graham ◽  
Kathryn M. Gregory-Wodzicki ◽  
Kari L. Wright
Keyword(s):  
Central Andes ◽  
Eastern Cordillera ◽  
History Of ◽  
Uplift History

scholarly journals Cenozoic uplift of the Central Andes in northern Chile and Bolivia—reconciling paleoaltimetry with the geological evolution

2016 ◽  
Vol 53 (11) ◽  
pp. 1227-1245 ◽  
Author(s):  
Simon Lamb
Keyword(s):  
Lower Crust ◽  
Central Andes ◽  
Crustal Thickening ◽  
Direct Result ◽  
Western Margin ◽  
Crustal Shortening ◽  
Eastern Cordillera ◽  
Surface Uplift ◽  
Geological Evolution ◽  
History Of

The Cenozoic geological evolution of the Central Andes, along two transects between ∼17.5°S and 21°S, is compared with paleo-topography, determined from published paleo-altimetry studies. Surface and rock uplift are quantified using simple 2-D models of crustal shortening and thickening, together with estimates of sedimentation, erosion, and magmatic addition. Prior to ∼25 Ma, during a phase of amagmatic flat-slab subduction, thick-skinned crustal shortening and thickening (nominal age of initiation ∼40 Ma) was focused in the Eastern and Western Cordilleras, separated by a broad basin up to 300 km wide and close to sea level, which today comprises the high Altiplano. Surface topography at this time in the Altiplano and the western margin of the Eastern Cordillera appears to be ∼1 km lower than anticipated from crustal thickening, which may be due to the pull-down effect of the subducted slab, coupled to the overlying lithosphere by a cold mantle wedge. Oligocene steepening of the subducted slab is indicated by the initiation of the volcanic arc at ∼27–25 Ma, and widespread mafic volcanism in the Altiplano between 25 and 20 Ma. This may have resulted in detachment of mantle lithosphere and possibly dense lower crust, triggering 1–1.5 km of rapid uplift (over ≪5 Myrs) of the Altiplano and western margin of the Eastern Cordillera and establishing the present day lithospheric structure beneath the high Andes. Since ∼25 Ma, surface uplift has been the direct result of crustal shortening and thickening, locally modified by the effects of erosion, sedimentation, and magmatic addition from the mantle. The rate of crustal shortening and thickening varies with location and time, with two episodes of rapid shortening in the Altiplano, lasting <5 Myrs, that are superimposed on a long-term history of ductile shortening in the lower crust, driven by underthrusting of the Brazilian Shield on the eastern margin.

scholarly journals Uplift history of the Sila Massif, southern Italy, deciphered from cosmogenic10Be erosion rates and river longitudinal profile analysis

Tectonics ◽  
2012 ◽  
Vol 31 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Valerio Olivetti ◽  
Andrew J. Cyr ◽  
Paola Molin ◽  
Claudio Faccenna ◽  
Darryl E. Granger
Keyword(s):  
Southern Italy ◽  
Profile Analysis ◽  
Longitudinal Profile ◽  
Erosion Rates ◽  
History Of ◽  
Uplift History

Non-explosive magma–water interaction in a continental setting: Miocene examples from the Eastern Cordillera (central Andes; NW Argentina)

2008 ◽  
Vol 71 (5) ◽  
pp. 509-532 ◽  
Author(s):  
Luigina Vezzoli ◽  
Massimo Matteini ◽  
Natalia Hauser ◽  
Ricardo Omarini ◽  
Roberto Mazzuoli ◽  
...  
Keyword(s):  
Central Andes ◽  
Cordillera Central ◽  
Eastern Cordillera ◽  
Water Interaction

A 25 myr chronostratigraphy of ignimbrites in south Peru: implications for the volcanic history of the Central Andes

2016 ◽  
Vol 173 (5) ◽  
pp. 734-756 ◽  
Author(s):  
Jean-Claude Thouret ◽  
Brian R. Jicha ◽  
Jean-Louis Paquette ◽  
Evren H. Cubukcu
Keyword(s):  
Central Andes ◽  
Volcanic History ◽  
History Of

Age, Inheritance, and Uplift History of the Old Woman-Piute Batholith, California and Implications for K-Feldspar Age Spectra

1989 ◽  
Vol 97 (2) ◽  
pp. 232-243 ◽  
Author(s):  
David A. Foster ◽  
T. Mark Harrison ◽  
Calvin F. Miller
Keyword(s):  
History Of ◽  
Uplift History

Paleoaltitudinal histories for the northern and southern margins of the Tibetan Plateau during the Late Cenozoic: revealed by GDGTs

2021 ◽  
Author(s):  
Chihao Chen ◽  
Yan Bai ◽  
Xiaomin Fang ◽  
Haichao Guo ◽  
Weilin Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
Global Climate ◽  
The Tibetan Plateau ◽  
Lake Surface ◽  
Terrestrial Organic Matter ◽  
Plant Fossils ◽  
History Of ◽  
Monsoon System ◽  
Uplift History

&lt;p&gt;As an important driver of global climate change during the Cenozoic, the uplift of the Tibetan Plateau (TP) has strongly influenced the origination and evolution of the Asian monsoon system, and therefore the aridification of central Asia. Over the last two decades, the application of stable isotope paleoaltimeters and the discoveries of mammal and plant fossils have greatly promoted the understanding of the uplift history of the TP. However, paleoaltitudinal reconstructions based on different paleoaltimeters have suggested differing outcomes and therefore remain controversial. Novel paleoaltimeters have therefore needed to be developed and applied to constrain the uplift history of the TP more accurately and effectively by comparing and verifying multi-proxies. Paleothermometers based on glyceryl dialkyl glycerol tetraethers (GDGTs) are widely used in terrestrial and ocean temperature reconstructions. In this study, GDGT-based paleothermometers were tentatively applied to the Gyirong Basin on the southern TP, and the Xining Basins on the northern TP, in an attempt to quantitatively reconstruct their paleoaltitudes.&lt;/p&gt;&lt;p&gt;Both soil and aquatic-typed branched GDGTs have been identified from Late Miocene to Mid-Pliocene (7.0-3.2 Ma) samples taken from the Gyirong Basin; their reconstructed paleotemperatures were 7.5&amp;#177;3.3&amp;#176;C and 14.2&amp;#177;4.5&amp;#176;C, respectively. The former temperature may represent the mean temperature of the terrestrial organic matter input area, while the latter may represent the lake surface temperature. The results would suggest that the lake surface of the Gyirong Basin during the Late Miocene to Mid-Pliocene was 2.5&amp;#177;0.8 km and that the surrounding mountains exceeded 3.6&amp;#177;0.6 km, implying that the central Himalayas underwent a rapid uplift of ~1.5 km after the Mid-Pliocene.&lt;/p&gt;&lt;p&gt;GDGT-based paleotemperature reconstructions using MBT'&lt;sub&gt;5ME&lt;/sub&gt; values show that the Xining Basin dropped in temperature by ~10&amp;#176;C during the ~10.5-8 Ma period, exceeding that in sea surface temperatures and low-altitude terrestrial temperatures during these periods. By combining these results with contemporaneous tectonic and sedimentary records, we infer that these cooling events signaled the regional uplift with the amplitude of ~1 km of the Xining basins. Our results support that the TP was still growing and uplifting substantially since the Late Miocene, which may provide new evidence for understanding the growth, expansion and uplift patterns of the TP.&lt;/p&gt;

scholarly journals Development of an incipient Paleogene topography between the present‐day Eastern Andean Plateau (Puna) and the Eastern Cordillera, southern Central Andes, NW Argentina

2020 ◽  
Author(s):  
Carolina Montero‐López ◽  
Fernando Hongn ◽  
Romina L. López Steinmetz ◽  
Alejandro Aramayo ◽  
Heiko Pingel ◽  
...  
Keyword(s):  
Central Andes ◽  
Eastern Cordillera ◽  
Southern Central
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