2009
DOI: 10.1007/s12594-009-0037-5
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Radioactive quartz-pebble conglomerates from western margin of Bonai granite pluton, Sundargarh district, Orissa — A new find

Abstract: Several radioactive quartz-pebble conglomerate (QPC) occurrences at the western margin of Archaean Bonai granite and overlying Iron Ore Group (IOG) rocks have recently been located over a total strike length of 8-10 km intermittently in a NE-SW to E-W trend with steep dips due north-west to north in parts of Sundargarh district of Orissa. The QPC samples have analysed up to 0.039% U 3 O 8 and 0.035% ThO 2 with high concentration of Y (74 to 518 ppm), La(<100 to 880 ppm), Cr ( 126 to 633 ppm), Zr (137 to 1250 p… Show more

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Cited by 9 publications
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“…Uraninite, zircon and chromite are well-rounded and detrital, similar to other Late Archaean to Palaeoproterozoic quartz-pebble conglomerate-hosted uranium mineralisation. Previous studies report up to 0.039 wt.% U 3 O 8 (Kumar et al , 2009) and 100 ppb to 2.25 ppm Au in the radioactive conglomerates (Jana et al , 2016). Both well-rounded and sub-rounded to angular zircons are present; the latter exhibit evidence for fluid-induced alteration to quartz and xenotime.…”
Section: Sample Description Texture and Geochemistry Of Zinc-rich Chr...mentioning
confidence: 92%
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“…Uraninite, zircon and chromite are well-rounded and detrital, similar to other Late Archaean to Palaeoproterozoic quartz-pebble conglomerate-hosted uranium mineralisation. Previous studies report up to 0.039 wt.% U 3 O 8 (Kumar et al , 2009) and 100 ppb to 2.25 ppm Au in the radioactive conglomerates (Jana et al , 2016). Both well-rounded and sub-rounded to angular zircons are present; the latter exhibit evidence for fluid-induced alteration to quartz and xenotime.…”
Section: Sample Description Texture and Geochemistry Of Zinc-rich Chr...mentioning
confidence: 92%
“…The clasts are at places stretched and fractured implying post-depositional deformation of the conglomerates. The matrix is composed of quartz, chlorite, sericite and heavy minerals such as uraninite, zircon, chromite, ilmenite, rutile, apatite, monazite, xenotime, pyrite and zircon (Kumar et al, 2009;Pal et al, in preparation). Uraninite, zircon and chromite are very well-rounded and detrital in nature similar to Late-Archaean-Palaeoproterozoic quartz pebble conglomerate-hosted uranium mineralization globally.…”
Section: Sample Description and Texture And Geochemistry Of Zincian C...mentioning
confidence: 99%
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