Evaluating the mechanical compaction of quartzarenites: The importance of sorting (Llanos foreland basin, Colombia)

Rossi, Carlos; Alaminos, A.

doi:10.1016/j.marpetgeo.2014.04.012

Cited by 17 publications

(7 citation statements)

References 16 publications

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“…Rossi and Alaminos (2014) used 45% as initial IGV of sandstones with sorting value 1.0 phi, which is very 15 close to the average sorting value of this study (0.9 phi), and the stabilized IGV can be approximately calculated by subtracting 10 percent units from initial IGV (i.e. about 40%).…”

Section: Compactionsupporting

confidence: 63%

Prediction of diagenetic facies using well logs – A case study from the upper Triassic Yanchang Formation, Ordos Basin, China

Cui

Wang

Jones

et al. 2017

Marine and Petroleum Geology

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(2017) 'Prediction of diagenetic facies using well logs a case study from the upper Triassic Yanchang Formation, Ordos Basin, China.', Marine and petroleum geology., 81 . pp. 50-65. Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Section: Compactionsupporting

confidence: 63%

Prediction of diagenetic facies using well logs – A case study from the upper Triassic Yanchang Formation, Ordos Basin, China

Cui

Wang

Jones

et al. 2017

Marine and Petroleum Geology

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“…To determine composition and provenance, three sand samples were impregnated with epoxy resin, thin sectioned, imaged under cathodoluminescence, and their relative abundances of quartz, feldspar and dolomite clasts were counted digitally, in all cases following the methods detailed in Rossi and Alaminos (2014). Samples POG-7 and PLY-1 are from sands overlying stromatolites (ST3, ST6).…”

Section: Methodsmentioning

confidence: 99%

“…Samples POG-7 and PLY-1 are similar, dominated by quartz (84-77%), dolomite (8-11%), Kfeldspar (0.4-3%), and iron-oxide grains (4-6%), with subordinate presence of sandstone rock fragments and stable heavy minerals. Quartz grains regularly show inherited overgrowths (sensu Rossi and Alaminos, 2014) and sandstone rock fragments are mostly of quartz-and kaolinite-cemented quartzarenites and subarkoses. The dolomite fragments are regularly highly corroded, showing abundant intracrystalline secondary porosity.…”

Section: Sand Composition and Provenancementioning

confidence: 99%

Paleo-watertable definition using cave ferromanganese stromatolites and associated cave-wall notches (Sierra de Arnero, Spain)

et al. 2016

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The steeply-dipping-dolostone-hosted caves of the Sierra de Arnero (N Spain) contain lowgradient relict canyons with up to ten mapped levels of ferromanganese stromatolites and associated wall notches in a vertical range of 85 m, the highest occurring ~460 m above base level. Despite a plausible speleogenetic contribution related to pyrite oxidation, and irregular cave wall mesomorphologies suggestive of hypogenic speleogenesis, the Arnero relict caves are dominantly epigenic as indicated by the conduit pattern and the abundant allogenic sediments. Allogenic input declined over time due to a piracy-related decrease in the drainage area of allogenic streams, explaining the large size of the relict Arnero caves relative to the present-day outcrop of the karstified carbonates. Allogenic sediment input also explains the observed change from water-table canyons to phreatic conduits in the paleo-downstream direction. Stromatolites and associated notches arguably formed in cave-stream passages at the water table. The best-defined paleo-water tables show an overall slope of 1.7º, consistent with the present-day relief of the water table, with higher-slope segments caused by minor barriers related to sulfide mineralization. The formation of ferromanganese stromatolites at the water table favored wall notching by the combined effect of enhanced acidity by Mn-Fe oxidation and shielding of cave floors against erosion by the stromatolites themselves. The presence of abrasive clastic sediments further contributed to notch formation by preventing erosion of passage floors and promoting lateral mechanical erosion. The irregular wallrock erosional forms of Arnero caves are related partly to paragenesis and partly to the porous nature of the host dolostones, which favored intercrystalline irregular dissolution near passage walls, generating friable halos. Subsequent mechanical erosion further contributed to generate irregular forms and spongeworks. The dolostone porosity also explains the paradox that virtually all cave development in Arnero is focused on dolostone despite being much less soluble than adjacent limestone. U-series dating of carbonate speleothems and paleomagnetic data from ferromanganese stromatolites and clastic sediments indicate that the paleo-water tables recorded ~320 m above the present-day water table formed during the Matuyama Chron but prior to ~1.5 Ma, implying a long-term rate of base level lowering of ~125 to ~213 m per Ma. To our knowledge, this is the first attempt of paleomagnetic dating of cave ferromanganese deposits. Ferromanganese stromatolites are excellent geomagnetic recorders and offer a direct way to delineate and date paleo-water tables, especially in caves developed in dolostone.

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“…Mechanical compaction is probably the dominant mechanism leading to porosity loss in sandstones (Lundegard, 1992). Its magnitude during the postdepositional alteration of sediments is controlled by the composition, size, shape, and sorting of the constituent grains and the burial history (Pittman, Larese, 1991;Lander, Walderhang, 1999;Paxton et al, 2002;Chuhan et al, 2003;Fawad et al, 2011;Bjørlykke, 2014;Rossi, Alaminos, 2014). During progressive burial clastic sediments undergo initially rearrangement (slippage, rotation) of the detrital grains which subsequently gives way to grain deformation, e.g.…”

Section: Mechanical Compactionmentioning

confidence: 99%

“…4a, c). In some arenites the presence of abundant mica flakes and/or ductile lithics (especially derived from sedimentary and metamorphic rocks) squeezed between rigid grains promoted advanced compaction (Pittman, Larese, 1991;Smosna, Bruner, 1997;Worden et al, 2000;Mansurbeg et al, 2013;Rossi, Alaminos, 2014) locally resulting in the formation of pseudomatrix (Fig. 3b; Stefanov et al, 2007, Plate VIc).…”

Section: Mechanical Compactionmentioning

confidence: 99%

Diagenesis of Paleogene sandstones in the Padesh strike-slip basin, Southwestern Bulgaria

Chatalov

Stefanov

2014

Geologica Balcanica

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Sandstones are a major rock type in the 2500 m thick Palaeogene sedimentary fill of the Padesh strike-slip basin. The main diagenetic alterations include mechanical compaction and carbonate cementation while dissolution, transformation, recrystallization, replacement and chemical compaction were of lesser significance during burial. These postdepositional processes and their products are discussed in terms of micropetrographic characteristics, spatial distributional patterns, mechanisms of formation, controlling factors, and temporal sequence. The diagenetic changes are related to eodiagenesis, mesodiagenesis, and telodiagenesis but most processes occurred during the mesodiagenetic stage. The sandstone diagenesis was controlled by the depositional facies, climate conditions, primary mineralogy and fabric, distribution and composition of the associated shales, chemistry of the pore fluids, sedimentation and subsidence rates, burial depth, and basin thermal regime. The most peculiar feature is recorded in basal sandstone strata of the Palaeogene succession which display evidence for minor selective dissolution and subsequent kaolinite precipitation in the produced secondary pores as a result of thermal maturation of organic matter in the adjacent black shales. Several lines of evidence indicate a hyperthermal character of the Padesh Basin thus resembling other “hot-type” sedimentary basins. The present study contributes to deciphering the diagenetic pathway of siliciclastic deposits in strike-slip basins characterized by elevated heat flow and can be applied for the evaluation of their hydrocarbon system potential. It also supports previous findings that thermal maturation of kerogene in carbonate-free, organic-rich shales may influence the mesodiagenetic alteration of adjacent sandstones in response to increased temperature.

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Evaluating the mechanical compaction of quartzarenites: The importance of sorting (Llanos foreland basin, Colombia)

Cited by 17 publications

References 16 publications

Prediction of diagenetic facies using well logs – A case study from the upper Triassic Yanchang Formation, Ordos Basin, China

Prediction of diagenetic facies using well logs – A case study from the upper Triassic Yanchang Formation, Ordos Basin, China

Paleo-watertable definition using cave ferromanganese stromatolites and associated cave-wall notches (Sierra de Arnero, Spain)

Diagenesis of Paleogene sandstones in the Padesh strike-slip basin, Southwestern Bulgaria

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