Detrital Zircon Typology and U/Pb Geochronology for the Miocene Ladrilleros-Juanchaco Sedimentary Sequence, Equatorial Pacific (Colombia): New Constraints on Provenance and Paleogeography in Northwestern South America

Osorio-Granada, E.; Restrepo-Moreno, Sergio A.; Muñoz-Valencia, Jaime Andrés; Trejos, Raúl; Barbosa-Espitia, Ángel A.; Pardo-Trujillo, Andrés

doi:10.1130/abs/2017am-308401

Cited by 4 publications

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“…Heavy mineral and U-Pb zircon provenance can be complemented by the typological analysis of zircon populations (Konsa and Puura, 1999;Capuzzo and Bussy, 2000;Anani et al, 2012;Osorio-Granada et al, 2017). The morphology of this ubiquitous, refractory mineral is controlled by temperature and chemical conditions during crystallization (Pupin, 1980), making it useful for tracking the different igneous rock types present in source regions (Dabard et al, 1996;Anani et al, 2012).…”

Section: Anh-tierraltamentioning

confidence: 99%

Provenance of Eocene–Oligocene sediments in the San Jacinto Fold Belt: Paleogeographic and geodynamic implications for the northern Andes and the southern Caribbean

et al. 2019

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Mesozoic and Cenozoic strata of the San Jacinto Fold Belt (Colombian Caribbean) provide insights about sedimentary environments and paleogeographic evolution in the transition between the northern Andes and the South Caribbean deformed belt. We report new provenance (conventional sandstone petrography, heavy mineral analysis, and detrital zircon U-Pb geochronology and typology) and micropaleontologic data (palynology, calcareous nannofossils, and foraminifera) in samples collected from the lower Eocene (San Cayetano Formation) and upper Eocene–Oligocene (Toluviejo and Ciénaga de Oro Formations) rocks in boreholes drilled by the Colombian Agencia Nacional de Hidrocarburos as well as from recently exposed Oligocene outcrops from the Ciénaga de Oro Formation. Sandstone petrography shows modal variations, with high feldspar content in the lower Eocene rocks and high quartz content in the Oligocene deposits. This shift in compositional maturity may be due to climatic variations, tectonic activity, and/or changes in source areas. Heavy mineral analyses indicate variations that suggest sources primarily related to felsic igneous and/or low-grade metamorphic and mafic and ultramafic rocks. Zircon U-Pb geochronology displays age populations mainly in the Late Cretaceous, Late Jurassic, Permian–Triassic, and Precambrian (ca. 900–1500 Ma). In addition, zircon typology analyses indicate that the igneous zircons came primarily from monzogranites and granodiorites. Finally, the micropaleontologic and sedimentary data sets indicate that the sediments were deposited in tropical coastal and shallow marine environments. The sediments were transported by short rivers from the crystalline massifs of the Lower Magdalena Valley and the northern Central Cordillera basements, while distal transport of sediments may have occurred along longer rivers, which brought sediments from southern regions located between the Central and Western Cordilleras.

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Section: Anh-tierraltamentioning

confidence: 99%

Provenance of Eocene–Oligocene sediments in the San Jacinto Fold Belt: Paleogeographic and geodynamic implications for the northern Andes and the southern Caribbean

et al. 2019

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“…There have only been few studies that used this features for detrital settings (e.g. Dunkl and Demény 1997;Naing et al 2014;Osorio-Granada et al 2017). In the case of Namibian modern sands there is a narrow array of zircon morphotypes in the south with highest amounts for the S24 (Fig.…”

Section: Remarks On Zircon Morphologymentioning

confidence: 99%

Implications for sedimentary transport processes in southwestern Africa: a combined zircon morphology and age study including extensive geochronology databases

Gärtner

Hofmann

Zieger

et al. 2021

Int J Earth Sci (Geol Rundsch)

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Extensive morphological and age studies on more than 4600 detrital zircon grains recovered from modern sands of Namibia reveal complex mechanisms of sediment transport. These data are further supplemented by a zircon age database containing more than 100,000 single grain analyses from the entire southern Africa and allow for hypothesising of a large Southern Namibian Sediment Vortex located between the Damara Orogen and the Orange River in southern Namibia. The results of this study also allow assuming a modified model of the Orange River sand highway, whose origin is likely located further south than previously expected. Moreover, studied samples from other parts of Namibia give first insights into sediment movements towards the interior of the continent and highlight the potential impact of very little spatial variations of erosion rates. Finally, this study points out the huge potential of detrital zircon morphology and large geo-databases as an easy-to-use additional tool for provenance analysis.

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“…For different rock types including magmatic, metamorphic, and sedimentary rocks, zircon grains developed into various crystal shapes due to different crystallization environment conditions such as temperature, pressure, pH value, oxygen fugacity, and so on [40,41]. Previous studies demonstrated that zircon is featured by slender crystals in high-level granites and acid volcanic rocks, but its crystal shapes generally are characterised by stunted and stubbed shapes in the sedimentary and low-grade metamorphic rocks [40][41][42]. Thus, the elongation of zircon grains that are not too round is always used as an index to reflect the crystallisation velocity and temperature [43,44].…”

Section: Sediment Provenance Of the Yangtze Delta In The Pliocenementioning

confidence: 99%

Morphology of Detrital Zircon as a Fingerprint to Trace Sediment Provenance: Case Study of the Yangtze Delta

et al. 2019

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Deltaic areas and marginal seas are important archives that document information on regional tectonic movement, sea level rise, river evolution, and climate change. Here, sediment samples from boreholes of the Yangtze Delta and the modern Yangtze drainage were collected. A quantitative analysis of detrital zircon morphology was used to discuss the provenance evolution of the Yangtze Delta. This research demonstrated that a dramatic change in sediment provenance occurred in the transition from the Pliocene to Quaternary. Zircon grains in the Pliocene sediments featured euhedral crystals with large elongation (>3 accounted for 13.2%) and were closely matched to tributary samples in the Lower Yangtze (>3 accounted for 11.3%), suggesting sediment provenance from the proximal river basin. However, most detrital zircon grains of the Quaternary samples exhibited lower values of elongation and increased roundness (rounded grains were 9.4%), which was similar to those found in the modern Yangtze mainstream (rounded grains were 12.5%) and the middle tributaries (rounded grains were 7.0%). The decrease in zircon elongation and improvement of its roundness in the Quaternary strata implied that the Yangtze Delta received sediments of different provenance that originated from the Middle-Upper Yangtze basin due to the uplift of the Tibetan Plateau. Statistical analysis of detrital zircon morphology has proven useful for studying the source-to-sink of sediments.Minerals 2019, 9, 438 2 of 15 intuitively determine zircon parent rocks and are potential fingerprints to be applied in sediment provenance analysis [13][14][15][16][17].Serving as an important depocenter of the Eastern China, the Yangtze Delta has preserved valuable information on sediment sources related to landform and river evolution [5,18,19]. Using different methods of clay mineral analysis, geochemistry, magnetic properties, single mineral geochronology (zircon, monazite age spectra), previous studies have identified a significant change in sediment provenance at the Pliocene-Quaternary transition [20][21][22][23]. However, sediment provenance evolution in the deltaic area is still controversial [22]. There is neither a consensus about the exact source of the Pliocene strata in the Yangtze Delta nor about the time when the Upper Yangtze sediments arrived at the delta. Different studies proposed that the Upper Yangtze sediment arrived either early in the Pliocene [21,24], in the Early-Middle Pleistocene [22,23,[25][26][27], or later in the late Pleistocene [28,29]. For these previous studies, only one borehole was used to represent the entire area of the Yangtze Delta, which may have resulted in different interpretations due to the limitations of the different methods. This is not only because of the vast area of Yangtze Delta but also because of its complex sedimentary strata.In order to extract the exact sediment provenance, several boreholes in different regions of the study area should be systematically analysed and compared to potential source sediments within ...

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Detrital Zircon Typology and U/Pb Geochronology for the Miocene Ladrilleros-Juanchaco Sedimentary Sequence, Equatorial Pacific (Colombia): New Constraints on Provenance and Paleogeography in Northwestern South America

Abstract: FIGURE 1. A) Location of the Ladrilleros-Juanchaco Sedimentary Sequence (LJSS) on the Colombian and South American context on the Paci c coast. B) Local geological framework of the LJSS (modi ed from Montoya, 2003). C) General aspect of outcrops for the LJSS in the studied section, NW-SE.

Cited by 4 publications

References 0 publications

Provenance of Eocene–Oligocene sediments in the San Jacinto Fold Belt: Paleogeographic and geodynamic implications for the northern Andes and the southern Caribbean

Provenance of Eocene–Oligocene sediments in the San Jacinto Fold Belt: Paleogeographic and geodynamic implications for the northern Andes and the southern Caribbean

Implications for sedimentary transport processes in southwestern Africa: a combined zircon morphology and age study including extensive geochronology databases

Morphology of Detrital Zircon as a Fingerprint to Trace Sediment Provenance: Case Study of the Yangtze Delta

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