scholarly journals The detrital record of late-Miocene to Pliocene surface uplift and exhumation of the Venezuelan Andes in the Maracaibo and Barinas foreland basins

2015 ◽  
Vol 29 ◽  
pp. 370-395 ◽  
Author(s):  
M. A. Bermúdez ◽  
C. Hoorn ◽  
M. Bernet ◽  
E. Carrillo ◽  
P. A. van der Beek ◽  
...  
2018 ◽  
Vol 497 ◽  
pp. 29-41 ◽  
Author(s):  
Maud J.M. Meijers ◽  
Gilles Y. Brocard ◽  
Michael A. Cosca ◽  
Tina Lüdecke ◽  
Christian Teyssier ◽  
...  

Geology ◽  
2020 ◽  
Vol 48 (8) ◽  
pp. 761-765 ◽  
Author(s):  
Arjan de Leeuw ◽  
Stephen J. Vincent ◽  
Anton Matoshko ◽  
Andrei Matoshko ◽  
Marius Stoica ◽  
...  

Abstract We describe a late Miocene to early Pliocene axial drainage system in the East Carpathian foreland, which was an important sediment supplier to the Black Sea and the Dacian Basin. Its existence explains the striking progradation of the northwest Black Sea shelf prior to the onset of sediment supply from the continental-scale Danube River in the late Pliocene to Pleistocene. This axial drainage system evolved due to the diachronous along-strike evolution of the Carpathians and their foreland; continental collision, overfilling, slab breakoff, and subsequent exhumation of the foreland occurred earlier in the West Carpathians than in the East Carpathians. After overfilling of the western foreland, excess sediment was transferred along the basin axis, giving rise to a 300-km-wide by 800-km-long, southeast-prograding river-shelf-slope system with a sediment flux of ∼12 × 103 km3/m.y. Such late-stage axial sediment systems often develop in foreland basins, in particular, where orogenesis is diachronous along strike. Substantial lateral sediment transport thus needs to be taken into account, even though evidence of these axial systems is often eroded following slab breakoff and inversion of their foreland basins.


2018 ◽  
Vol 40 (1) ◽  
pp. 399 ◽  
Author(s):  
E. Mposkos ◽  
A. Krohe ◽  
A. Diamantopoulos ◽  
I. Baziotis

In Attica, from the Miocene through the Quaternary, successive generations of detachment faults caused exhumation and denudation of Alpine HP rocks and – later on -formation of sedimentary basins. The Mesogea low angle detachment fault separates the HP rocks exposed at the southern flank of the Penteli Mtfrom the Late - post-Late Miocene Mesogea basin. Combined sedimentary-petrologic and structural analyses reveal the following: (i) Late Miocene sediments include material from unmetamorphosed source areas suggesting that, until then, parts of the HP rocks were buried under the (largely unmetamorphosed) Pelagonian nappe unit, (ii) Post-Late Miocene sediments exclusively contain clasts from high-P source areas and show downward bending of the layering that accommodates slip along a lis trie fault surface. Close to the Penteli Mt, within the post-Late-Miocene sediments gravity sliding-blocL· of metamorphic rocks occur. All this indicates post-Late Miocene activity along this detachment fault controlled rapid surface uplift/relief formation, denudation and fast erosion of HP rocks in the Penteli Mt.


2016 ◽  
Vol 155 (5) ◽  
pp. 997-1022 ◽  
Author(s):  
ROMESH N. PALAMAKUMBURA ◽  
ALASTAIR H. F. ROBERTSON

AbstractThe Mesaoria (Mesarya) Basin exemplifies multi-stage basin development within a regional setting of diachronous continental collision. The Plio-Pleistocene represented a period of major sediment accumulation between two topographic highs, the Kyrenia Range in the north and the Troodos Massif in the south. During Pliocene time, open-marine marls and chalks of the Nicosia (Lefkoşa) Formation accumulated in a shelf setting. The Early Pleistocene period was characterized by a relative fall in sea level and a change to shallower-water bioclastic deposition of the Athalassa (Gürpınar) Formation. The northern margin of the basin was approximately delineated by the E–W neotectonic Ovgos (Dar Dere) fault zone. A carbonate ramp system formed directly to the south of this structural feature. During Early Pleistocene time, the basin evolved from an open-marine shelf to semi-enclosed lagoons with deltaic deposits, and finally to a non-marine aeolian setting, flanked by the rising Kyrenia Range to the north. Synthesis of geological evidence from the Mesaoria (Mesarya) Basin as a whole, including outcrop and borehole evidence from the south, adjacent to the Troodos Massif, indicates that the Pliocene – Early Pleistocene represented a relatively quiescent period. This intervened between Late Miocene – earliest Pleistocene southward thrusting–folding of the Kyrenia Range and Pleistocene intense surface uplift of both the Kyrenia Range and the Troodos Massif. The basin development reflects flexurally controlled collapse during Late Miocene – earliest Pliocene time related to southward thrusting, followed by strike-slip during westward tectonic escape of Anatolia, and finally regional uplift controlled by under-thrusting of continental crust from the south, as collision progressed.


2017 ◽  
Author(s):  
Andreas Mulch ◽  
◽  
Maud J.M. Meijers ◽  
Maud J.M. Meijers ◽  
Gilles Y. Brocard ◽  
...  

Tectonics ◽  
2008 ◽  
Vol 27 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Marcelo Farías ◽  
Reynaldo Charrier ◽  
Sébastien Carretier ◽  
Joseph Martinod ◽  
Andrés Fock ◽  
...  

2011 ◽  
Vol 124 (1-2) ◽  
pp. 133-145 ◽  
Author(s):  
D. Cosentino ◽  
T. F. Schildgen ◽  
P. Cipollari ◽  
C. Faranda ◽  
E. Gliozzi ◽  
...  

2021 ◽  
Author(s):  
Maud J.M. Meijers ◽  
Gilles Y. Brocard ◽  
Ferhat Kaya ◽  
Cesur Pehlevan ◽  
Okşan Başoğlu ◽  
...  

<div> <p>The Central Anatolian Plateau (CAP, Turkey, elevation ca. 1-1.5 km) was established during the late Miocene. Prior to Pleistocene surface uplift of its southern margin (Tauride Mountains), a southern margin orographic barrier with similar-to-present elevations (ca. 2 km) existed between 8 and 5 Ma.</p> </div><div> <p>To unravel the interactions between tectonics and Earth surface processes, we quantify biotic and abiotic parameters for the late Miocene to Pliocene. As the CAP exposes presently incised fluvio-lacustrine sedimentary rocks of well-dated Miocene to Pliocene age, the region provides an excellent archive for reconstructing past landscape dynamics, such as surface uplift, lake hydrology, and drainage integration. Within this established framework, we now reconstruct the late Miocene to Pliocene ecosystem by measuring clumped isotope (Δ<sub>47</sub>) temperatures of carbonate formation and δ<sup>13</sup>C and δ<sup>18</sup>O values of paleosol carbonate and fossil mammal tooth enamel. Collectively, our data allow for the reconstruction of paleoclimate, vegetation types (C<sub>3</sub> vs. C<sub>4</sub>), mammalian diet, landscape heterogeneity, and seasonality.</p> </div><div> <p>The first clumped isotope-derived paleotemperatures indicate a large (8 <span>°</span>C) temperature difference at ca. 5.5 Ma between lacustrine carbonate from the Mediterranean coastal region (Adana Basin; ca. 26 ± 1.8 <span>°</span>C) and paleosol carbonate from the central Anatolian interior (ca. 18 ± 1.7 <span>°</span>C), which likely reflects the higher elevation of the CAP. Soil carbonate δ<sup>13</sup>C values from the plateau interior (13 sites, N= 344, ca. 10 to 2 Ma) are much higher between ca. 8 and 5 Ma (ca. –3 to 0 ‰) than earlier or later in time (ca. –8 to –5 ‰), which indicates the presence of a significant component of C<sub>4</sub> vegetation, characterized by wooded grasslands and grasslands, during the latest Miocene. In contrast, C<sub>3</sub>-dominated vegetation reflecting more wooded environments were dominant at ca. 10 Ma and from 4 to 2 Ma. The increase in C<sub>4</sub> vegetation during the late Miocene is coeval with surface uplift of the southern CAP margin, whereas an increase of C<sub>3</sub> vegetation by the Pliocene could coincide with a phase of subsidence of the southern CAP margin prior to its final phase of Pleistocene surface uplift. Furthermore, we collected mammal tooth enamel samples (equid, bovid, rhinocerotid, suid) from 11 individuals at one ca. 9 Ma-old and one latest Miocene-Pliocene<span> fossil site. </span>δ<sup>13</sup>C and δ<sup>18</sup>O values indicate the mammals at the two nearby fossil sites had varying diets and therefore access to different vegetation and water supplies. We are currently improving the stratigraphic framework and dating of these fossil sites, as well as obtaining tooth enamel δ<sup>13</sup>C and δ<sup>18</sup>O values of 44 more individuals to further constrain paleoenvironmental conditions and eventually the causality between tectonics and Earth surface processes in central Anatolia.</p> </div><div> <p><span>References:</span><strong><span> </span></strong><span>Meijers et al., 2018a: Palaeo3, doi: 10.1016/j.palaeo.2018.03.001; Meijers et al., 2018b: EPSL, doi: 10.1016/j.epsl.2018.05.040; Huang, Meijers et al., 2019: J of Biogeography, doi: 10.1111/jbi.13622; Meijers et al., 2020: Geosphere, doi: 10.1130/GES02135.1</span></p> </div>


Geosphere ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 490-509
Author(s):  
Maud J.M. Meijers ◽  
Gilles Y. Brocard ◽  
Donna L. Whitney ◽  
Andreas Mulch

Abstract Continued Africa-Eurasia convergence resulted in post–11 Ma surface uplift of the Central Anatolian Plateau (CAP) and the westward escape of the Anatolian microplate. Contemporaneously, a central Anatolian fluvio-lacustrine system developed that covered extensive parts of the rising CAP. Today, the semi-arid CAP interior—except for the Konya closed catchment—drains toward the Black Sea, the Mediterranean Sea, and the Persian Gulf. Lake connectivity and drainage patterns of the fluvio-lacustrine system in the evolving plateau region are, however, largely unknown. Here, we present sedimentological and stable isotopic (δ13C and δ18O) data (N = 665) from 13 well-dated lake sections covering the former fluvio-lacustrine depocenters of the southern CAP. Persistently (>1 m.y.) stable paleoenvironmental and hydrological conditions suggest that a low-relief environment characterized the southern CAP during plateau uplift. Throughout the late Miocene, various open and closed lakes of the southern CAP drained into closed, terminal lakes within the plateau interior. Sedimentation east of the Tuz Gölü fault ceased during the early Pliocene (ca. 5.3–3.6 Ma), when the eastern CAP became connected to marine base level as a result of river incision shortly after the switch from regional compression to extension. A final phase of lacustrine carbonate sedimentation characterizes most sampled basins, yet occurred asynchronously over the extent of the CAP. Therefore, the final episode of lacustrine sedimentation is unlikely to have been the result of a climatic event, consistent with the absence of a clear aridification trend in the lacustrine δ18O data. Rather, capping carbonates reflect the interplay of surface uplift and transition from inward- to outward-drained plateau regions and concomitant lake reorganization during the formation of the CAP and its margins.


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