Petrographic and geochemical characteristics of Paleogene turbidite deposits in the southern Aegean (Karpathos Island, SE Greece): Implications for provenance and tectonic setting

Pantopoulos, George; Zelilidis, A.

doi:10.1016/j.chemer.2011.05.001

Cited by 15 publications

(14 citation statements)

References 33 publications

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“…The method used involved point counting 50 sand grains per sample and measuring the total perimeter of each sand grain and the length that is covered by attached clay coats using Petrog statistical software (Pantopoulos and Zelilidis, 2012). Repeat analyses of the same sample indicated an average ±1.7% error for mean clay-coat coverage quantification.…”

Section: Data Sets and Methodsmentioning

confidence: 99%

Biofilm origin of clay-coated sand grains

Wooldridge

Worden

Griffiths

et al. 2017

Geology

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The presence of clay-sized particles and clay minerals in modern sands and ancient sandstones has long presented an interesting problem, because primary depositional processes tend to lead to physical separation of fine-and coarse-grained materials. Numerous processes have been invoked to explain the common presence of clay minerals in sandstones, including infiltration, the codeposition of flocculated muds, and bioturbation-induced sediment mixing. How and why clay minerals form as grain coats at the site of deposition remains uncertain, despite clay-coated sand grains being of paramount importance for subsequent diagenetic sandstone properties. We have identified a new biofilm mechanism that explains clay material attachment to sand grain surfaces that leads to the production of detrital clay coats. This study focuses on a modern estuary using a combination of field work, scanning electron microscopy, petrography, biomarker analysis, and Raman spectroscopy to provide evidence of the pivotal role that biofilms play in the formation of clay-coated sand grains. This study shows that within modern marginal marine systems, clay coats primarily result from adhesive biofilms. This bio-mineral interaction potentially revolutionizes the understanding of clay-coated sand grains and offers a first step to enhanced reservoir quality prediction in ancient and deeply buried sandstones.

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Section: Data Sets and Methodsmentioning

confidence: 99%

Biofilm origin of clay-coated sand grains

Wooldridge

Worden

Griffiths

et al. 2017

Geology

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“…The latter hypothesis is strengthen by a) data from the present study revealing evaporite diapirism into Middle Eocene turbidites and Late Eocene sandrich fan deposition, which is closely related with tectonic activity (Mattern 2005), and b) recent petrographic and geochemical data (Pantopoulos & Zelilidis 2012) that indicate that turbidite sedimentation probably took place in a continental island arc active tectonic setting closely related with the subduction of a branch of Neotethys and the advance of the Lycian Nappes towards the southsoutheast due to closure of this Neotethyan oceanic basin. However, possible eustatic sea level effects cannot be ruled-out, especially during Early Eocene (NP12-14) coarse sandstone/conglomerate deposition, which could be related with the proposed eustatic sea level lowstand (Haq et al 1987) during this time period.…”

Section: Type Of Organic Material-hydrocarbon Potentialmentioning

confidence: 63%

“…Clast lithology consists of limestone, marble, chert, quartzite, igneous, and ultramafic rocks. Thin-section study reveals the presence of compositionally immature wackes and litharenites (Pantopoulos & Zelilidis 2012) containing significant percentages of feldspars (c. 17%) and lithic fragments (c. 20.5%). Thin-bedded sandstone-mudstone alternations can be observed between conglomerate beds and at the marginal limits of the unit.…”

Section: Massive Sandstones/conglomeratesmentioning

confidence: 99%

“…Karpathos turbidites outcrop in 2 areas of the island (Pantopoulos & Zelilidis 2012), a northern area (Spoa, Olympos, and Diafani areas, Figure 2) and a southern area (Pigadia and Aperi areas, Figure 3). The total stratigraphic thickness of the turbidite succession in both areas is a little less than 1000 m. Six sedimentary units were recognized after geological mapping (Figures, 2, 3, and 12).…”

Section: Sedimentary Facies and Depositional Environmentsmentioning

confidence: 99%

“…The limited lateral extent and lenticular shape of the deposits possibly reflect local accumulation of sediment coming from one source point, possibly the mouth of a nearby river. Lenticular shape, a thickness that does not exceed 300 m, proximity to the source area, compositional immaturity of the detrital material (Pantopoulos & Zelilidis 2012), and the decrease in unit thickness to 0 m towards the margins are all observations that argue towards the classification of the observed massive sandstone/conglomerate unit as sand-rich submarine fan deposits according to the criteria proposed by Mattern (2005). Massive sandstones/ conglomerates are followed by fine-grained sandstones and olistoliths, reflecting a marked change in the depositional environment and possibly in sediment source (high abundance of carbonate material).…”

Section: Sedimentary Facies and Environmentsmentioning

confidence: 99%

See 2 more Smart Citations

Eocene to Early Oligocene turbidite sedimentation in the SE Aegean (Karpathos Island, SE Greece): stratigraphy, facies analysis, nannofossil study, and possible hydrocarbon potential

Pantopoulos¹,

Zelilidis²

2014

Turkish J Earth Sci

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Provenance and tectonic setting of the Early Permian sedimentary succession in the southern edge of the Sydney Basin, eastern Australia

et al. 2020

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Permian basins formed during a major phase of crustal extension are common throughout eastern Gondwana. One of these basins, the Sydney Basin, has not been subjected to geochemical studies aimed at determining the sedimentary provenance and the tectonic setting. This study provides new geochemical data of the Lower Permian siliciclastic successions in the southern edge of the Sydney Basin. Published petrographic analysis indicates a source area containing sedimentary, felsic volcanic, plutonic, and low-grade metamorphic rocks. Major, trace and rare earth element data suggest that the clastic rocks are geochemically mature and originated from a continental source that has been subjected to moderate to strong weathering. Further, they indicate that most source rocks were of felsic composition and that only the oldest sediments possess a more mafic signature. The provenance data presented in this study, along with published palaeocurrent data, point to the Lachlan orogen being the main source of sediments for the basin. Multi-dimensional discrimination diagrams suggest a continental rift setting and agree with the published sequence stratigraphic framework that suggests a deepening-upward depositional trend associated with tectonic subsidence. This study documents geochemically the provenance of the sedimentary successions within the southern edge of the Sydney Basin and the continental rift origin of the basin.

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Petrographic and geochemical characteristics of Paleogene turbidite deposits in the southern Aegean (Karpathos Island, SE Greece): Implications for provenance and tectonic setting

Cited by 15 publications

References 33 publications

Biofilm origin of clay-coated sand grains

Biofilm origin of clay-coated sand grains

Eocene to Early Oligocene turbidite sedimentation in the SE Aegean (Karpathos Island, SE Greece): stratigraphy, facies analysis, nannofossil study, and possible hydrocarbon potential

Provenance and tectonic setting of the Early Permian sedimentary succession in the southern edge of the Sydney Basin, eastern Australia

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