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Precambrian uranium-bearing quartz-pebble conglomerates ...

Uranium has been discovered in fluvial quartz-pebble conglomerates in most of the Precambrian shield areas of the world, including the Canadian, African, South American, Indian, Baltic, and Australian shields. Occurrences in these and other areas are shown. Two of these occurrences, the Huronian supergroup of Canada and the Witwatersrand deposit of South Africa contain 20 to 30 percent of the ...

Attribution of uranium ore concentrates using elemental ...

CAP analysis showed that sample groups originating from certain deposit types (phosphorite, quartz-pebble conglomerate and, to a lesser extent, unconformity-related) and sample groups originating from certain regions (Elliot Lake and Bancroft, Canada) contained a common impurity signature.

DEPARTMENT OF THE INTERIOR UNITED STATES …

(fig. 1), indicates that the quartz-pebble conglomerate of the Deep Lake Formation, which crops out north and west of Arrastre Lake, may contain economic concentrations of

Geological and geochemical investigations of uranium ...

The rocks in Canada contain major deposits of uranium in quartz-pebble conglomerates near the base of the metasedimentary sequence. Similar conglomerates in the Deep Lake Formation in the Medicine Bow Mountains of southeastern Wyoming are slightly radioactive and may contain deposits of uranium …

Geology and recognition criteria for uranium deposits of ...

Abstract. This report is concerned with Precambrian uraniferous conglomerates. This class of deposit has been estimated to contain between approximately 16 and 35 percent of the global uranium reserve in two rather small areas, one in Canada…

Quartz deformation and the recognition of ...

Quartz deformation and the recognition of recrystallization regimes in the Flinton Group conglomerates, Ontario JOSEPH C. WHITE' ... made to assess these relationships within quartz pebble ... Canada E3B 3. conglomerates of the Flinton Group in southeastern Ontario. In particular, the interdependence of pebble …

Quartz-pebble-conglomerate gold deposits: Chapter P …

Quartz-pebble-conglomerate gold deposits represent the largest repository of gold on Earth, largely due to the deposits of the Witwatersrand Basin, which account for nearly 40 percent of the total gold produced throughout Earth's history. This deposit type has had a controversial history in ...

Gold Deposits: The Quartz-Pebble Conglomerates | Investing ...

The ore bodies in the quartz-pebble conglomerate deposits are marked by the presence of abundant pyrite or hematite with variable and usually minor to trace amounts of a host of other sulfides ...

Quartz-pebble Conglomerate (NJJbcq;5) - USGS

Sedimentary > Clastic > Conglomerate (Bed) Near Morristown, beds of quartz-pebble conglomerate (unit Jbcq) as much as 0.5 m (1.6 ft) thick interfinger with beds of sandstone, siltstone, and shale.

Source of the detrital components of uraniferous ...

Large volumes of pyritic quartz-pebble conglomerate in the Elliot Lake district of Ontario contain at least 300,000 tonnes U3O8 recoverable at a grade of 0.1% (ref. 1), with much greater tonnages ...

Diverse origins of pyrites in Palaeoproterozoic ...

GOLDSCHMIDT CONFERENCE TOULOUSE 1998 Diverse origins of pyrites in Palaeoproterozoic uraniferous quartz-pebble conglomerates, Elliot Lake, Canada: Evidence from

PROGRESS REPORT ON THE STUDY OF …

Radioactive quartz-pebble conglomerate 36 Uranium and thorium minerals in Precambrian meta-conglomerates, Medicine Bow Mountains, south-central Wyoming, by George A. Desborough and William N. Sharp 38 ... conglomerates in the Blind River area of Canada. For this reason, Houston and others (1968, p. 159) suggested that …

Jasper conglomerate - Wikipedia

Jasper conglomerate, is an informal term for a very distinctive Paleoproterozoic quartz and jasper pebble conglomerate that occurs within the middle part of the Lorrain Formation of the Cobalt Group of the Huronian Supergroup.

Precambrian auriferous quartz-pebble …

There is a large variety of quartz-pebble conglomerates at Jacobina, the variables being the pebble size, from gritty to bouldery, the pebble color, fiom the dominant white to the rare yellow and reddishm, the matriw, from pure quartz sand %O heavy-rniner,als-rich9 or

The reappearance of the Huronian in Wyoming: …

Uranium-bearing quartz pebble conglomerate was subsequently identified in the Medicine Bow Mountains by S.M. Roscoe in the early 1970's (Houston and …

Gold in Quartz Pebble Conglomerates - Gold mining

Mar 01, 2011· Gold in Quartz Pebble Conglomerates Over 40% of the gold in the world is produced in the Witwatersrand of South Africa that is an ancient bed of conglomerate . It is only been in the past year that the source of the school's been discovered proving it to be a fossilized placer deposit formed when the gold a eroded from even older mountains ...

Quartz-pebble conglomerate | Article about quartz-pebble ...

The Great Duck Island Formation is interpreted to correlate with thick-bedded, purple quartz-pebble conglomerate exposed at The Dock in Long Island Bay on Grand Manan Island (Fyffe and Grant 2003).

Diagenetic origin for quartz-pebble conglomerates

324 GEOLOGY, April 2002 Figure 1. Comparison between numbers of GeoRef records for conglomerates (both quartz-pebble conglomerates [QPC] and non-QPC) and mass-age distribution of sedimentaryrocks.

Pardo Project, Ontario, Canada - Inventus Mining Corp.

The conglomerate reefs are extensive, flat lying layers ranging from 1 to 4 metres thick. In some areas these reefs are stacked and separated by interbedded sandstone. The basal formation, the Matinenda, is composed of pyritic quartz pebble conglomerate and underlies the Mississagi Formation, a polymictic cobble to boulder conglomerate (Figure 4).

Postdepositional modification of uraninite-bearing quartz ...

Postdepositional modification of uraninite-bearing quartz-pebble conglomerates from the Quirke ore zone, Elliot Lake, Ontario Andrew G. Robinson Univ. Toronto, Dep. Geol., Toronto, ON, Canada

Precambrian uranium-bearing quartz-pebble conglomerates ...

Uranium has been discovered in fluvial quartz-pebble conglomerates in most of the Precambrian shield areas of the world, including the Canadian, African, South American, Indian, Baltic, and Australian shields. Occurrences in these and other areas are shown. Two of these occurrences, the Huronian supergroup of Canada and the Witwatersrand …

U−Ti phases from Precambrian quartz-pebble conglomerates ...

U−Ti phases from Precambrian quartz-pebble conglomerates of the Elliot Lake area, Canada, and the Pongola basin, South Africa

Can the Elliot Lake uraninite-bearing quartz pebble ...

The ways in which evidence derived from the mineralogy of uraninite-bearing quartz pebble orthoconglomerates has hitherto been used in attempts to determine the oxygen content of the early Proterozoic atmosphere are critically reviewed in the light of recent studies of the conglomerates of the Quirke Ore Zone, Elliot Lake, Ontario, Canada …

Conglomerate: Sedimentary Rock - Pictures, Definition …

What is Conglomerate? Conglomerate is a clastic sedimentary rock that contains large (greater than two millimeters in diameter) rounded clasts. The space between the clasts is generally filled with smaller particles and/or a calcite or quartz cement that binds the rock together.

Geology of High Point State Park - New Jersey

Geology of High Point State Park, Sussex County, New Jersey and Field Trip Guide by Ron W. Witte and Don H. Monteverde 2005 printed on recycled paper N E E W J R S E ... quartz-pebble conglomerate, very tough rocks resistant to erosion, forms the highest land; whereas softer rock underlies the valleys.

Endurance Gold Corporation - Shareholding - Inventus ...

Gold mineralization defined to-date on the Pardo Property is spatially associated with pyritic and quartz pebble bearing portions of both the Matinenda and Mississagi Formation conglomerates. The widespread occurrence of gold mineralization associated with these conglomerates and the potential size of the target warrants further …

Evolution of Cretaceous–Cenozoic quartz pebble ...

Quartz pebble conglomerates (QPCs) are an important source of alluvial gold worldwide. The most important deposits are those of the Archaean Witwatersrand sediments of South Africa, which have yielded more than 43,000 tonnes of gold between 1887 and 1994 ( Robb and Robb, 1998 ).

Gold Deposits: The Quartz-Pebble Conglomerates - Nasdaq.com

Quartz-pebble conglomerate deposits are a valuable asset for miners and explorers. Here is a sample of miners/explorers with interests in gold quartz-pebble conglomerate deposits:

The Depositional Model of Uranium-Bearing Quartz-Pebble ...

The Depositional Model of Uranium-Bearing Quartz-Pebble Conglomerate of Precambrian Age and Application to Exploration. F. Allan Hills. Abstract. Ancient quartz-pebble conglomerates have been the source of most of the gold ever mined and are a major source of uranium and a potential major source of thorium. Conglomeratic …

LEBANON AND SCHUYLKILL COUNTIES 16–039

It is a prominent outcrop of quartz-pebble conglomerate of the Pottsville Formation; it is more than 60 feet high and extends for about 0.6 mile into Schuylkill County to the northeast. It is composed of large, discrete blocks of rock that were established by widely spaced joints at nearly right

Precambrian uranium-bearing quartz-pebble conglomerates ...

Abstract. Uranium has been discovered in fluvial quartz-pebble conglomerates in most of the Precambrian shield areas of the world, including the Canadian, African, South American, Indian, Baltic, and Australian shields.

Evolution of Cretaceous–Cenozoic quartz pebble ...

The origin of quartz pebble conglomerate tions for placer-source relationships. New Zealand Journal of placers: The New Zealand perspective. Proceedings of the 6th Geology and Geophysics 45, 53 – 69.