The geochemistry of archaean clastic metasediments in relation to crustal evolution, Northeastern Yilgarn Block, Western Australia

Marston, R. J.

doi:10.1016/0301-9268(78)90010-4

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…Note that with the exception of some biotite and finegrained greywackes, all other samples correspond to greywacke proper. Marston, 1978) highlighting the correspondence of the main GDS greywackes to greywackes proper and those of some of the biotite-and fine-grained greywackes to Fe-Mg potassic sandstone. with significant volcanic detritus are characterized by K 2 O/ Na 2 O ratios of <1.0 It is inferred form these observations that most and if not all of the sediments constituting the upper part of greywacke sequence (or inner portions of the sector) were derived from a felsic volcanic source and represent products of submarine weathering.…”

Section: Conglomeratic and Other Greywackes Located Close To The Westmentioning

confidence: 99%

Petrology and geochemistry of greywackes from Goa-Dharwar sector, western Dharwar Craton: Implications for volcanoclastic origin

et al. 2010

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Late Archaean Supracrustals of the Goa-Dharwar sector (GDS) are composed of a thick sequence of greywacke sequence with narrow intercalations of quartzite, BIF and carbonates. Mafic volcanics occupy the base of the sequence. The greywackes are predominantly tuffacious containing chlorite-sericite and hornblende. Arkosic variations containing biotite dominate the western part of the sector. Fine-grained variations occur as isolated narrow lenses within other types of greywackes. The conglomeratic greywackes are localized along the western and the eastern margins of the sector. All of the greywackes are all typically immature containing coarser clasts of mostly plagioclase (18-23%) and quartz (32-34%). Lithic fragments of felsic volcanic rocks are common. The matrix is dominated by mafic material. Biotite and amphibole are related to metamorphic recrystallization. Chlorite, sericite, epidote, carbonate and chert are products of the interplay of diagenesis and low-grade metamorphism. Fe-Ti oxide, sphene, apatite and zircon are usual accessories. But for slight enrichment in K 2 O, the major element chemistry of the GDS greywackes is similar to the chemistry of Late Archaean greywackes. They also compare in respect of V, Co, Hf contents, K Nd ratios, steep REE patterns with distinct LREE enrichment and HREE depletion. The GDS greywackes however are distinctly enriched in Rb, Ba, Sr, Th, U, Cu, Zr, Ce/Ce* and depleted in Cr, Ni, and Zn. The conglomeritic and biotite bearing verities contain considerable proportions of clasts derived from the basement tonalitic/granitic terrain. The common tuffacious greywackes containing hornblende and biotite-sericite however include only volcanic clasts and bear evidence of derivation from submarine weathering of predominantly felsic volcanics erupted on a large scale to form a magmatic arc in the later stages of geosynclinal deposition. Geochemical data suggest that the GDS greywackes were laid down in progressively changing basin geometry from a passive to active continental margin and island arc setting.

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Section: Conglomeratic and Other Greywackes Located Close To The Westmentioning

confidence: 99%

Petrology and geochemistry of greywackes from Goa-Dharwar sector, western Dharwar Craton: Implications for volcanoclastic origin

et al. 2010

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“…The variation diagram from Herron (1988) is the binary plot of log (Fe 2 O 3 /K 2 O) versus log (SiO 2 /Al 2 O 3 ) demonstrates that most of the samples plot in the wacke field (Figure 5(c)). The classification of the greywacke of the Hazara Formation modified after Herron (1988), Marston (1978), Pettijohn et al (1972) and Roser and Korsch (1986) is given in Figure 5(a) -5(d 1982). Some trace elements like Th, Sc, Co, Zr, and La are immovable during the depositional process and the elements are useful indicators of definite source rocks (Taylor & McLennan 1985).…”

Section: Petrographic Characteristicsmentioning

confidence: 99%

The Provenance and Tectonic Settings of the Greywacke Member of the Late Neoproterozoic Hazara Formation Lesser Himalayas, Northern Pakistan: Evidence from Geochemistry and Petrography

Dar¹,

Pu²,

Sajid³

et al. 2021

JSM

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The petrographic and geochemical analysis of the greywacke horizon of the late Neoproterozoic Hazara Formation from the Hazara Mountains has been investigated to determine the provenance, tectonic settings and weathering history of the sediments. The Late Neoproterozoic Hazara Formation is a thick sedimentary sequence comprising of greywacke, shale, argillites, siltstone, and limestone. The greywackes are characterized by fine to medium-grained, moderately sorted and sub-angular to sub-rounded framework grains. They are rich in quartz, lithic fragments and clay minerals. The petrographic investigation of the greywackes categorized them as feldspathic greywacke in the QFR diagram. The quartz content is higher in sandstone and may reach to 70%, which indicates a weathered felsic source. Chemical Index of Alteration values of greywacke suggests that the source region has experienced highly weathering conditions with a warm and moist climate. Various geochemical interpretations, elemental ratios like Th/Sc, La/Sc,Th/Cr, and positive Eu anomalies indicate that the greywackes of the Hazara formation derived from a felsic source and were deposited within an active continental margin tectonic settings. The main source area of the sediments of the greywackes was located to south to southeast, which may possibly be the Aravali orogeny, central Indian craton and Bundelkhand craton. Finally, the geochemical data of the major elements point to a felsic igneous provenance for the greywacke.

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“…Major element and trace element data have been used to classify the sandstones (Pettijohn, et al, 1972;Herron, 1988;Marston, 1978;Le Maitre et al, 1989;Bhatia and Crook, 1986). A binary variation diagram of SiO 2 /Al 2 O 3 vs K 2 O/Na 2 O (after Wimmenauer, 1984) (Fig.…”

Section: Geochemical Charactericticsmentioning

confidence: 99%

“…One sample plots in the field of 'litharenite' and the average of Archaean greywacke of Fig Tree, Barberton (Toulkeridis et al, 1999) plots in the 'Fe-sand.' On the ternary diagram of Fe 2 O 3 t+MgO-Na 2 O-K 2 O (after Marston, 1978), a majority of the samples plot in the field of 'greywacke' and one sample plots in the field of 'sodic sandstone'. The average of Archaean greywacke of Fig Tree, Barberton (Toulkeridis et al, 1999) and the average of greywacke with biotite from the Goa-Dharwar sector (Devaraju et al, 2010) plots in the 'Fe-Mg potassic sandstone' (Fig.…”

Section: Geochemical Charactericticsmentioning

confidence: 99%

“…Deformation of the greywacke is manifested in the form of a pinch and swell feature of the chlorite-biotite band. Generally, the chemical composition of greywacke is related to the mineral constituents but the observed trends suggest that the chemical composition also depends on the grain size of Marston, 1978) shows most of the samples fall in the 'greywacke' field except one which plots in the 'sodic sandstone' field. Vol.…”

Section: Geochemical Charactericticsmentioning

confidence: 99%

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The Origin and Tectonic Setting of Precambrian Greywacke of Ribandar‐Chimbel, Goa, India: Petrological and Geochemical Evidence

Fernandes

Iyer

Kotha

2016

Acta Geologica Sinica (Eng)

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The Precambrian greywacke of Ribandar-Chimbel belonging to the Sanvordem Formation of the Goa Group, India, has been studied for petrography and analyzed for major trace elements. The greywacke is characterized by angular to sub-round grains of quartz, feldspar, biotite, chlorite and clay minerals. The abundance of clay in the matrix seems to have influenced the Al 2 O 3 content and the K 2 O/Al 2 O 3 ratio. The variation diagrams indicate a decreasing trend of TiO 2 , Al 2 O 3 , Fe 2 O 3 and MgO; whereas Na 2 O and CaO exhibit a scatter which could be a result of the variable presence of feldspar within the sediments. The immobile elements, vanadium (25 to 144 ppm), nickel (up to 107 ppm) and chromium (up to 184 ppm), reflect abundance of clay minerals. The greywacke shows strongly fractionated REE patterns with La N /Yb N = 8 to 26 and with higher total REE abundances (up to 245 ppm). The low REE enrichment and depletion in heavier REE with prominent negative Eu anomaly (Eu/Eu*= 0.54 to 0.79) suggest a derivation of the greywacke from an old upper continental crust composed chiefly of felsic components. Petrological evidence and geochemical data suggest that the deposition of the greywacke largely took place in a deep to shallow basin that progressively changed from that of a continental island arc to an active continental setting.saprolite with Fe-rich mottling and/or segregations, Fe-Al segregations and nodular concretions, laterite with fretworks of Fe-rich segregations, semi-indurated Fe-rich tubular textured laterite and indurated laterite cap. Below the fretworks, a palaeo-water-table occurs. It is to be noted that the Merces quarry, of which only the laterite was studied in detail by Widdowson (2009), is the same as the Chimbel quarry described in this paper.

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The geochemistry of archaean clastic metasediments in relation to crustal evolution, Northeastern Yilgarn Block, Western Australia

Cited by 15 publications

References 19 publications

Petrology and geochemistry of greywackes from Goa-Dharwar sector, western Dharwar Craton: Implications for volcanoclastic origin

Petrology and geochemistry of greywackes from Goa-Dharwar sector, western Dharwar Craton: Implications for volcanoclastic origin

The Provenance and Tectonic Settings of the Greywacke Member of the Late Neoproterozoic Hazara Formation Lesser Himalayas, Northern Pakistan: Evidence from Geochemistry and Petrography

The Origin and Tectonic Setting of Precambrian Greywacke of Ribandar‐Chimbel, Goa, India: Petrological and Geochemical Evidence

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