Reading Provenance from Detrital Quartz

Basu, Abhijit

doi:10.1007/978-94-017-2809-6_11

Cited by 61 publications

(50 citation statements)

References 9 publications

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“…Suttner, 1974;Basu, 1985;Jolinsson, 1993). Studies on modem sand contribute to our understanding of the effects of processes controlling the composition of sand size sediment.…”

Section: Introductionmentioning

confidence: 99%

Composition of modern stream sand derived from a mixture of sedimentary and metamorphic source rocks (Henares River, Central Spain)

Arribas

Critelli

Pera

et al. 2000

Sedimentary Geology

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The Henares River, central Spain, flows westward from the Iberian Range (Mesozoic sedimentary rocks) under semi arid climatic conditions, In the middle and lower reaches, the Henares River receives sediment from three tributaries E-mail addresses:arribas@eucmax.sim.ucm.es(J.Arribas).critelli@irpi.cs.cnr.it(S.Critelli).lepera@irpi.cs.cnr.it (E. Le Pera) , Henares sand composition takes place by the mixing of tributary deposits with previously deposite d Henares River terraces. Abrasion during transport does not appear to cause signifi cant changes in the sand composition along the Henares River.

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“…Suttner, 1974;Basu, 1985;Jolinsson, 1993). Studies on modem sand contribute to our understanding of the effects of processes controlling the composition of sand size sediment.…”

Section: Introductionmentioning

confidence: 99%

Composition of modern stream sand derived from a mixture of sedimentary and metamorphic source rocks (Henares River, Central Spain)

Arribas

Critelli

Pera

et al. 2000

Sedimentary Geology

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“…This possibly indicate that the parent rocks were situated in both arid and humid climatic setting during the Permian time. The presence of polycrystalline quartz grains that are not elongated nor flattened, but of nearly equant grains with sutured intercrystalline boundaries and non-undulose quartz extinction support a plutonic igneous granitoid source as the dominant source rock under a humid climatic condition [1,43,49,57,65]. Nonetheless, the presence of monocrystalline quartz with strong undulose extinction and metamorphic rock fragment suggest that some of the sediments were of metamorphic source.…”

Section: Weathering Of Source Areasmentioning

confidence: 90%

“…Stronger chemical weathering is usually associated with warm and humid climates, whereas more arid climate is mostly allied with relatively weak chemical weathering. [56,57] documented that tropical warm and humid climates supported by low relief that led to intense chemical weathering is the most active agent modifying the composition of the original detritital sandstone. Other modifying agents include sediment transport across tectonic boundaries, changing tectonic styles at provenance as well as mixing with other sources, sediment recycling and reworking in depositional environment and diagenesis [58,59].…”

Section: Weathering Of Source Areasmentioning

confidence: 99%

Modal composition and tectonic provenance of the sandstones of Ecca Group, Karoo Supergroup in the Eastern Cape Province, South Africa

2017

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Petrography of the sandstones of Ecca Group, Karoo Supergroup in the Eastern Cape Province of South Africa have been investigated on composition, provenance and influence of weathering conditions. Petrographic studies based on quantitative analysis of the detrital minerals revealed that the sandstones are composed mostly of quartz, feldspar and lithic fragments of metamorphic and sedimentary rocks. The sandstones have an average framework composition of 24.3% quartz, 19.3% feldspar, 26.1% rock fragments, and 81.33% of the quartz grains are monocrystalline. These sandstones are generally very fine to fine grained, moderate to well sorted, and subangular to subrounded in shape. In addition, they are compositionally immature and can be classified as feldspathic wacke and lithic wacke. The provenance characteristics suggest the influence of plutonic and metamorphic terrains (meta-magmatic arc) as the main source rock with minor debris derived from recycled sedimentary rocks. The latter revealed that the compositional immaturity of the sandstones is a result of weathering or recycling and short transport distance. The weathering diagrams and semiquantitative weathering index indicate that the Ecca sandstones are mostly from a plutonic source area, with climatic conditions ranging from arid to humid. The detrital modal compositions of these sandstones are related to back arc to island and continental margin arc. These results, therefore, support previous studies that infer foreland basin setting for the Karoo Basin.

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“…Como se ha comentado anteriormente, estas arenas proceden de macizos con temperaturas de formación inferiores a 450°. Este valor concuerda con los datos de temperatura de formación de litologías metamórficas de bajo grado en Basu (1985).…”

Section: Aspectos Petrográfkos Generales De Las Arenasunclassified

“…Gran parte de los estudios que sobre este tema se han realizado se basan en el análisis específico de determinados minerales detríticos, como los minerales pesados (Morton, 1985), feldespatos (Helmold, 1985) y cuarzos (Basu, 1985) entre otros.…”

Section: Introductionunclassified

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Tortosa¹,

Herranz²,

Mocoroa³

1988

Estud. geol.

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En el presente trabajo se analiza el contenido de las distintas tipologías de cuarzo, definidas por Basu et al. (1975) para análisis de procedencia, en depósitos arenosos actuales, generados a partir de macizos del Sistema Central con distintas litologías (granitos, gneises, pizarras-esquistos).Aplicando la metodología de dichos autores se observa que, para los depósitos estudiados, pierde validez para discriminar áreas de procedencia plutónica y metamórfica de alto grado en función del contenido en las tipologías monocristalinas. No obstante, se corrobora la utilidad del contenido en las tipologías policristalinas para diferenciar áreas metamórficas de bajo grado.Palabras clave: Arenas, depósitos actuales, petrología, procedencia, tipologías de granos de cuarzo. ABSTRACfIn this study we have analized the content of the different detrital quartz types (Basu et aJ., 1975) in recent sands derived from single source areas (granitic, gneissic and slate-schists lithologies) in the Sistema Central. Following the methodology of Basu et aJo (1975), for sand provenance interpretation, we have observed Ibat, in these deposits, the content of monocrystaline quartz types is not useful to discriminate plutonic and high rank metamorphic sources. However, we can confirm the validity of the policrystaline types content to distinguish sands of low rank metamorphic parentage.

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Reading Provenance from Detrital Quartz

Cited by 61 publications

References 9 publications

Composition of modern stream sand derived from a mixture of sedimentary and metamorphic source rocks (Henares River, Central Spain)

Composition of modern stream sand derived from a mixture of sedimentary and metamorphic source rocks (Henares River, Central Spain)

Modal composition and tectonic provenance of the sandstones of Ecca Group, Karoo Supergroup in the Eastern Cape Province, South Africa

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