The genesis of Proterozoic uranium deposits in Australia

1979 ◽  
Vol 291 (1381) ◽  
pp. 339-353 ◽  
Keyword(s):  
Precious Metals ◽  
Mineral Deposits ◽  
Uranium Deposits ◽  
The West ◽  
Acid Magma ◽  
Uranium Ore ◽  
Connate Water ◽  
Ore Bodies ◽  
Mineralizing Fluids ◽  
Proterozoic Age

The principal mineral deposits of Proterozoic age in Australia, not only of uranium but also of base and precious metals, are found within a north-trending belt central to the continent which stretches from Adelaide to Darwin. This belt represents the margin to the West Australian Archaean craton, and comprises orogenic and shelf domains that evolved throughout the Proterozoic; and it is suggested that the formation of the uranium deposits was an integral part of the evolution of the various geosynclines in the belt. The uranium ore bodies occupy structurally prepared features such as shears, faults and breccias, and are clearly introduced, but the source of the mineralizing fluids, and the precise mechanism of deposition, is, in some cases at least, in dispute. Mineralization per ascensum by connate water carrying metals desorbed from the sedimentary pile, or in association with acid magma which may itself be the product of anatexis, is favoured by the author.

scholarly journals Metallogenic characteristics and genesis of granite type uranium ore bodies in South China

2021 ◽  
Vol 261 ◽  
pp. 02068
Author(s):  
Zekun Liu
Keyword(s):  
South China ◽  
Uranium Deposits ◽  
Uranium Ore ◽  
Ore Bodies ◽  
Geological Conditions ◽  
Granite Type ◽  
Important Progress ◽  
Made In ◽  
Metallogenic Characteristics

South China is the key producing area of granite-type uranium deposits in China. After decades of exploration, many important progress has been made in the study of metallogenic regularity of granite type uranium deposits in this area. On the basis of previous studies, this paper attempts to sort out the geological conditions and characteristics of diagenesis and mineralization of granite type uranium deposits in South China, and discuss their metallogenic models, so as to better summarize the metallogenic regularity and serve the prospecting and prediction.

Geochemistry of the Athabasca Basin, Saskatchewan, Canada, and the Unconformity-related Uranium Deposits Hosted By It

2020 ◽  
Author(s):  
Paul Alexandre
Keyword(s):  
Chemical Composition ◽  
Large Data ◽  
Aluminum Phosphate ◽  
Enrichment Factors ◽  
Uranium Deposits ◽  
Average Chemical Composition ◽  
Data Set ◽  
Athabasca Basin ◽  
Ore Bodies ◽  
Five Elements

Abstract A large data set comprising near-total digestion analyses of whole rock samples from the Athabasca Basin, Saskatchewan, Canada (based principally on the Geological Survey of Canada open file 7495), containing more than 20,000 analyses, was used to define the average chemical composition of Athabasca Group sandstones and of unconformity-related uranium deposits hosted by the basin. The chemical composition of unaltered and un-mineralized Athabasca Group sandstones is dominated by Al (median Al2O3 of 1.14 wt.%), Fe (median Fe2O3 of 0.24 wt.%), and K (median K2O of 0.11 wt.%; Si was not measured), corresponding mostly to the presence of kaolin, illite, and hematite, in addition to the most-abundant quartz. The median concentration of U in the barren sandstones is 1 ppm, with 5 ppm Th, 3 ppm Pb, and 56 ppm ΣREE. Other trace elements present in significant amounts are Zr (median of 100 ppm), Sr (median of 69 ppm), and B (median of 43 ppm), corresponding to the presence of zircon, illite, and dravite. The elements most enriched in a typical Athabasca Basin unconformity-related uranium deposit relative to the barren sandstone are U (median enrichment of ×710), Bi (×175), V (×77), and Mg (×45), followed by five elements with enrichment factors between 20 and 30 (Co, Mo, K, As, and Ni). These correspond to the presence in the ore bodies of alteration minerals (dravite, kaolinite, illite, chlorite, aluminum-phosphate-sulfate minerals, and a suite of sulfide minerals) and are similar to what has been observed before. These elements are similar to the typical pathfinder elements described above known deposits, but their usefulness has to be assessed based on their relative mobility in the predominantly oxidizing Athabasca Basin sandstones.

Notes on the mineral deposits of the Teign valley, Devon

1945 ◽  
Vol 27 (189) ◽  
pp. 75-78
Author(s):  
J. V. Ramsden
Keyword(s):  
Mineral Deposits ◽  
List Type ◽  
Type Number ◽  
Granite Massif ◽  
Eastern Flank ◽  
The North ◽  
Ore Bodies ◽  
History Of ◽  
East West

Research into the history of the old mines suggests that two mineralized fissuring systems intersect in central Devon, often carrying commercial ore-bodies. The older of these is the east-west system usually carrying copper, iron, or tin, which has been extensively worked in west Devon, but is less developed on the eastern flank of the Dartmoor granite massif.The younger north-south series, characterized by its lead and silver ores and baryte is particularly well developed in the Teign valley. This band of mineralization can be traced from the north of Scotland through Brittany and Spain to Algeria. In Devon it appears to be divided into three main fissure bands:1.Combe Martin to Plymouth.2.North Molton to Spreyton, with a possible extension south of the Dartmoor granite.3.Molland to Newton St. Cyres and the Teign valley.

scholarly journals Geodynamic position of large and super large precious metal and uranium ore districts and nodes in the East Asia

2019 ◽  
Vol 486 (1) ◽  
pp. 74-77
Author(s):  
V. G. Khomich ◽  
N. G. Boriskina
Keyword(s):  
Lower Mantle ◽  
Precious Metals ◽  
Northern China ◽  
Heat Fluxes ◽  
Uranium Ore ◽  
Mantle Fluid ◽  
Frontal Part ◽  
The World ◽  
World Class ◽  
Oceanic Slab

The analysis results of the geophysical, seismic tomography and mineragenic data are presented, revealing the prerequisites for the regular of the location large and unique precious metals and uranium ore nodes of Southeast Russia, East Mongolia and Northern China. Shown that probable causes localization of the world-class ore clusters and districts above a stagnant oceanic slab perimeter are predetermined by concentration of the lower mantle fluid-heat fluxes at the frontal part of the slab and on its flanks, which are represented by sublatitudinal paleotransformal faults.

scholarly journals Features of earthquake epicenters and mineral deposits spatial relationship in the Urals

2021 ◽  
pp. 31-36
Author(s):  
Aleksandr Guliaev ◽  
Keyword(s):  
Spatial Relationship ◽  
Ore Deposits ◽  
Tectonic Activity ◽  
Mineral Deposits ◽  
The Urals ◽  
Ural Mountain ◽  
Tectonic Structures ◽  
The West ◽  
East European ◽  
Modern Era

Introduction. Recent Ural mountain belt is an N-S Paleozoic orogen rejuvenated in the NeogeneQuaternary period. It separates the East European plate located to the west of it and the West Siberian plate located to the east of it. The Uralian orogeny presumably occurred at the Paleozoic time as a result 36 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 4. 2021 ISSN 0536-1028 of these plates interaction, which affected the geologic structure of the region. In the modern era, low tectonic activity in the bowels of the Urals continues supported by rare tangible earthquakes with a magnitude from 2.0–3.0 to 5.0–5.5, 3.0 – 3.5 on the average, and the intensity in the epicenter from 3.0–4.0 to 5.0–6.0 on MSK-64 scale. Research aim is to analyze the spatial relationship of sensible earthquakes epicenters and mineral deposits in the Urals. Research methodology included estimating the position of Ural earthquakes epicenters and mineral deposits relative to the geologic and tectonic structures of Paleozoic time, recent epoch, and the modern era. Research results. Most earthquake epicenters in the Urals are concentrated within the western part of the Uralian Orogeny to the west of the Main Uralian Fault (MUF), while most mineral deposits, especially ore deposits, are concentrated within the eastern part of the Uralian orogeny to the east of MUF. In the axial zone of MUF, earthquake epicenters are close and sometimes coincide. Consequently, the processes of ore deposits and earthquake foci formation are of a similar nature

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