Petrography and major element geochemistry of the Permo-Triassic sandstones, central India: Implications for provenance in an intracratonic pull-apart basin

Ghosh, Sampa; Sarkar, Suman; Ghosh, Parthasarathi

doi:10.1016/j.jseaes.2011.09.011

Cited by 49 publications

(31 citation statements)

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“…13; Colwell et al, 1994;Stilwell et al, 2012). As a consequence, we suggest that the Abor Volcanics in the lower Siang River result from the approximately coeval rifting that was also taking place between India/Antarctica and India/Australia, for example, Veevers and Tewari (1995), Harrowfield et al (2005), and Veevers (2006), as well as extension within the Indian Craton (Ghosh et al, 2012) (Fig. 13).…”

Section: Permian Volcanism Eastern Gondwana Break-up Formation Of Nmentioning

confidence: 55%

Paleomagnetic data support Early Permian age for the Abor Volcanics in the lower Siang Valley, NE India: Significance for Gondwana-related break-up models

Ali

Aitchison

Chik

et al. 2012

Journal of Asian Earth Sciences

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a b s t r a c tConfusion exists as to the age of the Abor Volcanics of NE India. Some consider the unit to have been emplaced in the Early Permian, others the Early Eocene, a difference of $230 million years. The divergence in opinion is significant because fundamentally different models explaining the geotectonic evolution of India depend on the age designation of the unit. Paleomagnetic data reported here from several exposures in the type locality of the formation in the lower Siang Valley indicate that steep dipping primary magnetizations (mean = 72.7 ± 6.2°, equating to a paleo-latitude of 58.1°) are recorded in the formation. These are only consistent with the unit being of Permian age, possibly Artinskian based on a magnetostratigraphic argument. Plate tectonic models for this time consistently show the NE corner of the sub-continent >50°S; in the Early Eocene it was just north of the equator, which would have resulted in the unit recording shallow directions. The mean declination is counter-clockwise rotated by $94°, around half of which can be related to the motion of the Indian block; the remainder is likely due local Himalayan-age thrusting in the Eastern Syntaxis. Several workers have correlated the Abor Volcanics with broadly coeval mafic volcanic suites in Oman, NE Pakistan-NW India and southern Tibet-Nepal, which developed in response to the Cimmerian block peeling-off eastern Gondwana in the Early-Middle Permian, but we believe there are problems with this model. Instead, we suggest that the Abor basalts relate to India-Antarctica/India-Australia extension that was happening at about the same time. Such an explanation best accommodates the relevant stratigraphical and structural data (present-day position within the Himalayan thrust stack), as well as the plate tectonic model for Permian eastern Gondwana.

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Section: Permian Volcanism Eastern Gondwana Break-up Formation Of Nmentioning

confidence: 55%

Paleomagnetic data support Early Permian age for the Abor Volcanics in the lower Siang Valley, NE India: Significance for Gondwana-related break-up models

Ali

Aitchison

Chik

et al. 2012

Journal of Asian Earth Sciences

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“…2). Были проанализированы песчаники и глинистые породы: 1) неогенового бассейна Йиянг (Jiyang), Северный Китай (№ 1) [Cai et al, 2008[Cai et al, , 2011; 2) неопротерозойской серии Юинта Маунтин (Uinta Mountain), США (№ 2) [Condie et al, 2001]; 3) палеопротерозойской формации Серпент (Serpent) надсерии Гурон, Канада (№ 8) [Fedo et al, 1997]; 4) мезопротерозойской уйской серии, Учуро-Майский регион, Россия (№ 36) [Подковыров, 2001;Подковыров и др., 2002;Khudoley et al, 2001;Cullers, Podkovyrov, 2002]; 5) отложений мезо-неопротерозоя юго-восточной части блока Янцзы, Южный Китай (№ 37) [Deru et al, 2007]; 6) неопротерозойской формации Гамбл Брук (Gamble Brook), Авалонский террейн, Канада (№ 38) [Murphy, 2002]; 7) перми и триаса Центральной Индии (№ 39) [Ghosh et al, 2012] [Tao et al, 2014]; 14) неопротерозойской чингасанской серии Енисейского кряжа (№ 63) [Ножкин и др., 2007, 2008; Лиханов, Ревердатто, 2015]; 15) прикамской свиты нижнего рифея Волго-Уральской области (№ 64) [Маслов, 1994б; Маслов, Ишерская, 1998].…”

Section: материал и методыunclassified

Synrift sandstones and clayey rocks: bulk chemical composition and location on a number of discriminant paleogeodynamic diagrams

Маслов

Маслов²,

Подковыров

et al. 2019

Литология и полезные ископаемые

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The bulk chemical composition of synrift sandstones and associated clayey rocks has been analized, and the distribution of the fields they form has been studied on discriminant paleogeodynamic SiO2K2O/Na2O [Roser, Korsch, 1986] and DF1DF2 [Verma, Armstrong-Altrin, 2013] diagrams. The studied sandstones in terms of bulk chemical composition mainly correspond to greywacke, lititic, arkose and subarkose psammites; Sublitites and quartz arenites are also found. A significant part in the analyzed data massif consists of psammites, in which log(Na2O/K2O)-1.0; missing on the Pettijohn classification chart. This confirms our conclusion, based on the results of mineralogical and petrographic studies, that the sedimentary infill of rift structures unites immature sandstones, the detrital framework of which was formed due to erosion of local sources, represented by various magmatic and sedimentary formations. Synrift clayey rocks, compared with sandstones, are composed of more mature fine-grained siliciclastics. As follows from the distribution of figurative data points of clayey rocks on the F1F2 diagram [Roser, Korsch, 1988], its sources were mainly sedimentary deposits. The content of most of the main rock-forming oxides in the synrift sandstones is almost the same as in silt-sandstone rocks present in the Upper Precambrian-Phanerozoic sedimentary mega-complex of the East European Plate, but at the same time differs significantly from the Proterozoic and Phanerozoic cratonic sediments, as well as from the average composition upper continental crust. It is shown that the distribution of the fields of syntift sandstones and clayey rocks on the SiO2K2O/Na2O diagram does not have any distinct features, and their figurative data points are localized in the areas of terrigenous rocks of passive and active continental margins. On the DF1DF2 diagram, the fields of the studied psammites and clayey rocks are located in areas of riftogenous and collisional environments. We have proposed a different position of the border between these areas in the diagram, which will require further verification.

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“…Los diagramas de discriminación de marco tectónico propuestos por Bhatia (1983) y Roser y Korsch (1986) fueron evaluados por Armstrong-Altrin y Verma (2005) y se obtuvo que la relación de éxito para los diagramas es muy bajo. Varios autores han expresado la desventaja de esos diagramas discriminatorios tradicionales para rocas silisiclásticas (e.g., Weltje, 2006Weltje, , 2012Caja et al, 2007;Borges et al, 2008;Armstrong-Altrin, 2009;Blanco et al, 2011;Guo et al, 2011;Caracciolo et al, 2012;Ghosh et al, 2012;Zaid, 2012).…”

Section: Marco Tectónicounclassified

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2018

revmexcg

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Geochemistry of major oxides was carried out on the siliciclastic rocks collected from the Sierra Anibacachi and Rancho Búfalo sections of the Morita Formation (Early Cretaceous) exposed in the northeast of Sonora, to interpret the paleoweathering conditions and tectonic settings of the source rocks. Geochemically, the siliciclastic rocks were classified as sublitharenite, litharenite, subarkose and Fe-sand. The Morita Formation consists mainly of siliciclastic rocks that were deposited under fluvial conditions and the total thickness vary between 560 and 855 m in Sierra Anibacahi and Rancho Búfalo, respectively. The CIA and PIA values and A-CN-K diagram of sandstones from Sierra Anibacachi section indicate a low to intense chemical weathering of the source area, whereas CIA values for siltstone and shale show moderate intensity of chemical weathering in the source region. Similarly, the CIA and PIA values and the A-CN-K plot suggest that the sandstones from Rancho Búfalo section were derived from low to intensely weathered source region, whereas siltstones were received sediments from source rocks affected by low to moderate degree of chemical weathering. The siliciclastic rocks from Sierra Anibacachi and Rancho Búfalo sections show large variations in ICV values, indicating that these samples are compositionally immature to mature. The tectonic discriminant-function-based multidimensional diagram shows arc, rift REVISTA MEXICANA DE CIENCIAS GEOLÓGICAS v. 35, núm. 2, 2018, p. 103-115 Meteorización y marco tectónico de rocas siliciclásticas de la Formación Morita, noreste de Sonora, México Ramírez-Montoya et al. RMCG | v. 35 | núm. 2 | www.rmcg.unam.mx | DOI: http://dx.doi.org/10.22201/cgeo.20072902e.2018.2.481and collision fields for the sandstones from Sierra Anibacachi section, rift and collision for siltstone, while collision setting for shales. However, most of the sandstones and siltstones from Rancho Búfalo section fall in the arc field, whereas some sandstones fall in the collision field. The siliciclastic rocks from Sierra Anibacachi and Rancho Búfalo section show large variations in the tectonic settings of the source rocks. However, the results obtained from the discriminant function diagrams are consistent with a regional tectonic evolution of the study area.

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Petrography and major element geochemistry of the Permo-Triassic sandstones, central India: Implications for provenance in an intracratonic pull-apart basin

Cited by 49 publications

References 41 publications

Paleomagnetic data support Early Permian age for the Abor Volcanics in the lower Siang Valley, NE India: Significance for Gondwana-related break-up models

Paleomagnetic data support Early Permian age for the Abor Volcanics in the lower Siang Valley, NE India: Significance for Gondwana-related break-up models

Synrift sandstones and clayey rocks: bulk chemical composition and location on a number of discriminant paleogeodynamic diagrams

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