Pure shear-dominated transpression and vertical extrusion in a strike-slip fault splay from the Itapirapuã Shear Zone, Ribeira Belt, Brazil

Forero-Ortega, Anny J.A.; Campanha, Ginaldo Ademar da Cruz; Faleiros, Frederico Meira; Yogi, M. T. A. G.

doi:10.1016/j.tecto.2020.228455

Cited by 12 publications

(3 citation statements)

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“…Strike‐slip fault deformation can cause sudden modifications in drainage networks and source areas, leading to significant changes in the provenance signals that are recorded in neighbouring basins (e.g., Gibson et al, 2021; Liu et al, 2021; Zhou et al, 2022). Moreover, orogens controlled by strike‐slip tectonics are characterized by along‐strike variations in deformational styles, resulting in the coexistence of rock subsidence, displacement and uplift (e.g., Cunningham & Mann, 2007; Forero‐Ortega et al, 2020; Lin & Yamashita, 2013). Based on our provenance and thermochronological data, we suggest that the Southern Central Cordillera experienced exhumation and uplift coeval with the development of fluvial connections that required the fragmentation of this mountain belt between ca.…”

Section: Discussionmentioning

confidence: 99%

“…It is, therefore, possible that during these initial phases, the formation of low and discontinuous F I G U R E 1 0 Compiled petrography and zircon data from the Northern Andes Miocene strata and the basements of the Central and Eastern Cordilleras, black squares contain the references of the compiled data while white stars denoting the data presented in this contribution (R1: Anderson et al, 2016;R2: Blanco-Quintero et al, 2014;R3: Bustamante et al, 2016, Bustamante et al, 2010R4: Caballero et al, 2013;R5: Cochrane et al, 2014;R6: Echeverri et al, 2015;R7: Horton et al, 2010;R8: Lara et al, 2018;R9: Montes et al, 2021;R10: Muñoz Granados, 2019;R11: Naranjo et al, 2018;R12: Rodríguez et al, 2016;R13: Villamizar-Escalante et al, 2021;R14: Zapata, Cardona, et al, 2019). (a) sandstone classification diagram after Folk (1980) Qt: total quartz, F: total feldspar, L: total lithics, Lv: volcanic lithics, Ls: sedimentary lithics and Lm: metamorphic lithics. (b), Kernel Density Estimates of zircon U-Pb ages data from the Upper (UMB) and Middle Magdalena (MMB) basins.…”

Section: Colombian Hinterland and Foreland Regionsmentioning

confidence: 99%

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Drainage and sedimentary response of the Northern Andes and the Pebas system to Miocene strike‐slip tectonics: A source to sink study of the Magdalena Basin

et al. 2023

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Miocene strike‐slip tectonics was responsible for creating and closing short‐lived (ca. 6 Ma) passages and the emergence of isolated topography in the Northern Andes. These geological events likely influenced the migration and/or isolation of biological populations. To better understand the paleogeography of the Miocene hinterland and foreland regions in the Northern Andes, we conducted a source‐to‐sink approach in the Magdalena Basin. This basin is located between the Central and Eastern Cordilleras of Colombia and contains an ample Miocene record, which includes Lower Miocene fine‐grained strata and Middle Miocene to Pliocene coarsening‐up strata. Our study presents a new data set that includes detrital U–Pb zircon ages (15 samples), sandstone petrography (45 samples) and low‐temperature thermochronology from the Southern Central Cordillera (19 dates); which together with previously published data were used to construct a paleogeographical model of the Miocene hinterland and foreland regions in the Northern Andes. The evolution of the Magdalena Basin during the Miocene was characterized by playa and permanent lake systems at ca. 17.5 Ma, which may be related to a marine incursion into NW South America and western Amazonia. The appearance of Eocene to Miocene volcanic sources in the Honda Group after ca. 16 Ma suggests the development of fluvial passages, which connected the Pacific with the western Amazonia and Caribbean regions. These passages were synchronous with a time of Miocene exhumation and topographic growth (ca. 16 to 10 Ma) in the Central Cordillera and the transition from lacustrine to fluvial deposition in the Magdalena Basin. Middle to Late Miocene strike‐slip deformation promoted by oblique plate convergence and the oblique collision of the Panamá‐Chocó Block likely explains the synchronous along‐strike fragmentation and exhumation in the Central Cordillera.

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Section: Discussionmentioning

confidence: 99%

Section: Colombian Hinterland and Foreland Regionsmentioning

confidence: 99%

Drainage and sedimentary response of the Northern Andes and the Pebas system to Miocene strike‐slip tectonics: A source to sink study of the Magdalena Basin

et al. 2023

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“…Source: Prepared with information from Passchier and Trouw (2005), and García (2011). generated along the X direction and the foliation correspond to the XY planes of the ellipsoid (Flinn, 1979;Ramsay and Huber, 1983;Passchier and Trouw, 2005;Fossen, 2013). To make a cut that reveals the greatest deformation, and additionally, the geometry and direction of movement registered by the kinematic indicators is observed, a section normal to the axis of deformation symmetry must be defined (XZ section of the deformation ellipsoid).…”

Section: Figure 3 Schematic Illustrating the Orientation Of The Sample In The Fieldmentioning

confidence: 99%

Geological-structural mapping and geocronology of shear zones: A methodological proposal

Ortega¹,

Isaza²,

Herrera³

et al. 2021

Bol.geol.

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The deformation registered in rocks in the field can be characterized based on the structures preserved in outcrops, which can related be to wide discontinuity zones named faults and shear zones. The geological-structural mapping and the geochronology of these tectonic structures are a topic of great interest not only for tectonic modeling but also for reconstruction of the geological evolution of the national territory. The methodology suggest for the analysis of faults and shear zones is based on eight steps, including: 1) definition of the geological context in which the structure was developed; 2) photointerpretation, image geoprocessing, and geological-structural mapping of the structural and lithological characteristics of the faults and shear zones; 3) petrographic analysis of field-oriented samples; 4) quantification of strain orientation and geometry through 3D finite strain analyses and quantification of non-coaxiliaty of deformation through vorticity analyses; 5) SEM-TEM-EBSD microanalysis; 6) quantification of the P-T conditions of deformation through phase-equilibria modeling or conventional geothermobarometry; 7) dating of syn-kinematic minerals phases and mylonitic rocks through Ar-Ar analyses, in order to determine the reactivation and deformation ages of the structure, respectively, as well as the implementation of the U-Pb technique in syn-kinematic calcite crystals developed in the fault planes; and 8) dating of geological elements adjacent to the structure, such as syn-kinematic intrusive bodies associated with the deformation event using zircon U-Pb dating, rocks hydrothermally altered through Ar-Ar method, and zircon and apatite fission-tracks dating of the blocks adjacent to the faults for determining exhumation ages.

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A Laurentian affinity for the Embu Terrane, Ribeira Belt (SE Brazil), revealed by zircon provenance statistical analysis

Ribeiro

Faleiros

Campanha

et al. 2023

Geoscience Frontiers

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Pure shear-dominated transpression and vertical extrusion in a strike-slip fault splay from the Itapirapuã Shear Zone, Ribeira Belt, Brazil

Cited by 12 publications

References 81 publications

Drainage and sedimentary response of the Northern Andes and the Pebas system to Miocene strike‐slip tectonics: A source to sink study of the Magdalena Basin

Drainage and sedimentary response of the Northern Andes and the Pebas system to Miocene strike‐slip tectonics: A source to sink study of the Magdalena Basin

Geological-structural mapping and geocronology of shear zones: A methodological proposal

A Laurentian affinity for the Embu Terrane, Ribeira Belt (SE Brazil), revealed by zircon provenance statistical analysis

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