Sediment provenance in contractional orogens: The detrital zircon record from modern rivers in the Andean fold-thrust belt and foreland basin of western Argentina

Capaldi, Tomas N.; Horton, Brian K.; McKenzie, N. Ryan; Stöckli, Daniel F.; Odlum, Margaret

doi:10.1016/j.epsl.2017.09.001

Cited by 63 publications

(52 citation statements)

References 44 publications

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“…Neogene evolution of retroarc regions involved continued eastward advance of deformation and foreland basin evolution, with large‐scale shortening accommodated in the frontal thrust belt (Subandean/Santa Bárbara zone) and minor shortening across most of the orogenic interior (Barnes et al, , ; Echavarria et al, ; Ege et al, ; Gubbels et al, ; Kley & Monaldi, ; Lamb, ; Lamb & Hoke, ; Lease et al, ; McQuarrie et al, ; Uba et al, ). Basin evolution was concentrated in foreland regions east of the thrust front, with topographically isolated basins in intermontane settings and the hinterland plateau (Capaldi et al, ; Carrapa et al, ; Coutand et al, ; Horton, , , , ; Horton et al, ; Jordan & Alonso, ; Levina et al, ; Mosolf et al, ; Murray et al, ; Sempere et al, ; Siks & Horton, ; Sobel et al, ; Strecker et al, ; Streit et al, ). Stable isotope data and geomorphic surfaces suggest that major surface uplift of the hinterland plateau at 18–22°S was accomplished from middle Miocene to present (Garzione et al, , ; Hoke et al, ; Jordan et al, ), with a possibility of much earlier surface uplift in the Puna plateau at 24–26°S (Canavan et al, ; Quade et al, ).…”

Section: Central Andes (23°s)mentioning

confidence: 99%

Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

2018

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Construction of the Andes has been governed largely by fluctuating contractional, neutral, and extensional tectonic regimes during differing degrees of mechanical coupling along the convergent plate boundary. These three contrasting regimes are likely regulated by geodynamic variations in absolute trenchward motion of South America and episodic regional shifts in the geometry of the subducting oceanic slab. Alternations among these three modes are revealed in syntheses of Mesozoic‐Cenozoic crustal deformation, basin evolution, and arc magmatism along orogen‐perpendicular transects across the central and southern Andes at 23°S, 35°S, and 43°S. Despite considerable along‐strike dissimilarities in the magnitude of deformation, a comparable tectonic regime typified the early Andean history, as defined by a transition from Late Jurassic‐Early Cretaceous postrift thermal subsidence to Late Cretaceous retroarc shortening. A key contradiction is expressed for the late middle Eocene to earliest Miocene, when neutral to extensional conditions affected retroarc to forearc regions, except in parts of the central Andes, which experienced retroarc shortening with only localized forearc extension. This mixed‐mode scenario during Paleogene time may reflect decoupling along the plate boundary (possibly during slab rollback within a retreating subduction system) in which widespread stasis or low‐magnitude extension dominated the southern Andes but was inhibited in the strongly shortened central Andes at 15–25°S where shallow subduction and/or high topography boosted plate coupling. Comparable temporal and spatial shifts in tectonic regime along the Andes and other convergent margins can be related to variable degrees of coupling during first‐order plate‐scale changes in convergence and second‐order regional cycles of slab shallowing and steepening.

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Section: Central Andes (23°s)mentioning

confidence: 99%

Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

2018

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“…The most obvious stratigraphic trend is a steady increase in the percentage of the detrital zircon population derived from the Choiyoi Group of the Cordillera Frontal, which varies from 12% at the base of the Mariño Formation to 47% within the Río de los Pozos Formation. The zircon fertility of the Choiyoi Group is impressive, and, in a manner similar to the conglomerate clasts, it has the potential to swamp the detrital zircon signal from less-productive strata (Capaldi et al, 2017). Therefore, apparent stratigraphic trends in detrital zircon populations should be examined with caution.…”

Section: U-pb Detrital Zircon Provenancementioning

confidence: 99%

Sedimentologic and stratigraphic evolution of the Cacheuta basin: Constraints on the development of the Miocene retroarc foreland basin, south-central Andes

et al. 2018

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Retroarc foreland basins in contractional arc settings contain evidence of temporal and spatial variations in magmatic activity, deformation, and exhumation along the continental margin and serve as excellent recorders of subduction dynamics through time. The Cacheuta basin, northwestern Mendoza Province, Argentina, is situated within the transition zone between the Pampean flat-slab subduction segment north of 33°S and the normal-dipping slab segment of the Southern Volcanic Zone to the south, and it records a detailed history of Andean orogenic exhumation at this latitude. The integration of sedimentologic, stratigraphic, geochronologic, and sediment provenance data from the Cacheuta basin constrains orogenic exhumation patterns and basin evolution during basin development. Cacheuta basin strata record at least a 12 m.y. period of basin evolution (ca. 20 Ma to younger than 7.5 Ma), based on new geochronology. The timing of initial basin subsidence is constrained by the lowermost sample in the Mariño Formation, which yielded a maximum depositional age of 19.2 ± 0.26 Ma, ~4 m.y. earlier than previous interpretations. Conglomerate clast counts, thin section petrography, and detrital zircon analyses, coupled with distinct sedimentologic variations, record progressive orogenic exhumation of the Cordillera Principal, Cordillera Frontal, and Precordillera during early to middle Miocene time. Examination of basinal strata demonstrate that uplift of the Cordillera Principal, Cordillera Frontal, and Precordillera, and simultaneous development of the Cacheuta retroarc foreland basin, in the early to mid-Miocene was the result of contractional deformation and crustal thickening during normal subduction-related orogenic processes and did not result from the development of the flat slab in late Miocene time.

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“…Over the past decades, detrital zircon (DZ) U-Pb geochronology has emerged as a leading tool in provenance studies due to the durability and ubiquity of zircon in siliciclastic systems and major analytical advances in laser ablation inductively coupled plasma mass spectrometry, allowing for rapid and reliable acquisition of large U-Pb geochronological data sets (e.g., Fedo et al, 2003;Košler & Sylvester, 2003;Gehrels, 2014). Despite this remarkable revolution in zircon-based isotopic provenance analysis, the DZ U-Pb provenance approach may have some limitations due to variable zircon fertility among different rock types (strong bias toward felsic igneous rocks), spatially homogeneous or nondiagnostic source terrane U-Pb age signatures, or complex recycling and mixing (e.g., Capaldi et al, 2017;Malusà et al, 2016;Moecher & Samson, 2006). Some of these possible ambiguities have been (partially) mitigated through the combination with other isotopic or chronometric techniques such as Hf isotopes or (U-Th)/He dating, adding additional provenance metrics for individual grains (e.g., Gerdes & Zeh, 2006;Reiners et al, 2005;Thomson et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

Barber

Stöckli

Galster

2019

Geochem Geophys Geosyst

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Detrital zircon (DZ) U‐Pb geochronology is a widely used provenance tool that leverages bedrock age signatures of hinterland source terranes. However, complex sediment recycling of multicycle zircon and hinterland provinces with nondiagnostic U‐Pb ages represent possible pitfalls for provenance reconstructions. Additional biases pertain to source rock zircon fertilities and insensitivity to low‐ and medium‐grade tectonothermal events that do not result in zircon generation. To bridge these inherent biases and gaps in DZ U‐Pb provenance data sets and derive more comprehensive tectonic reconstruction, this study combined U‐Pb and trace element analyses on DZ, apatite, and rutile as well as zircon (U‐Th)/He analyses from the Proto‐Zagros foreland basin in western Iran to shed light on Late Cretaceous tectonic accretion along Arabia. Integrated multimineral, multimethod data sets record formation of a 110‐ to 85‐Ma island arc within Triassic mid‐oceanic ridge crust of the Neotethys ocean, simultaneous obduction starting in Santonian‐Early Campanian times, and inversion of the Arabian rift margin. Overall, integration of these techniques constrains provenance based on multiple independent criteria including crystallization age, cooling history, and petrogenic‐geodynamic environment. This approach not only more completely described provenance signatures but also helped avoid significant pitfalls. For example, while Triassic DZ U‐Pb ages might be mistaken as input from Eurasia, zircon trace element analysis reveals a MORB signature and attributes these DZ to Neotethyan oceanic rather than Eurasian continental origin, having fundamentally different paleogeographic/tectonic implications for the Arabia‐Eurasia collision. Moreover, detrital rutile and apatite resolve and characterize multiple Paleozoic‐Mesozoic thermotectonic events not recorded by DZ U‐Pb due to their largely amagmatic nature.

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Sediment provenance in contractional orogens: The detrital zircon record from modern rivers in the Andean fold-thrust belt and foreland basin of western Argentina

Cited by 63 publications

References 44 publications

Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

Sedimentologic and stratigraphic evolution of the Cacheuta basin: Constraints on the development of the Miocene retroarc foreland basin, south-central Andes

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

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