Origin of Uranous and Uranyl Minerals at the Centennial Deposit, Athabasca Basin, Northern Saskatchewan, Canada
نویسندگان
چکیده
Both uranous and uranyl minerals are present in the Centennial unconformity-type U deposit situated in the SW Athabasca Basin, Canada. At least two generations of uraninite are present (disseminated and massive), often strongly altered to coffinite, followed by minor fibrous coffinite forming in veins. Uranyl minerals, mostly uranophane with minor haiweeite precipitating in veins and in hand sample-scaled breccias, are present in significant amounts (ca. 5% of the ore) not observed elsewhere in the Athabasca Basin. The multi-stage evolution of the Centennial deposit is explained by the existence of high permeability conduits, promoting the recurrent circulation of P-rich fluids that remobilized U locally. Stable isotopes composition of uranophane (dD of ca. –130 ‰ and d18O of ca. 6 ‰) suggests that recent oxidizing meteoric fluids penetrated to the unconformity (at a depth of ca. 800 m) via the major Dufferin lake fault.
منابع مشابه
Genesis of the Tang Zagh iron deposit by using mineralogical and geochemical data, Hormozgan province
The Tang Zagh iron deposit is located about 117 km Northeast of Bandar Abbas, Hormozgan Province in the structural folded-thrusted zone of the Zagros basin. Iron mineralization occurs in the form of iron oxides (hematite) within the salt dome and/or in fractures and between the layers of the younger strata with the Tertiary age. Based on the microscopic studies, dolomitic fragments of the host ...
متن کاملU AND Pb ISOTOPE ANALYSIS OF URANIUM MINERALS BY ION MICROPROBE AND THE GEOCHRONOLOGY OF THE MCARTHUR RIVER AND SUE ZONE URANIUM DEPOSITS, SASKATCHEWAN, CANADA
A method for in situ U–Pb isotopic analyses by secondary ion mass spectrometry (SIMS) has been developed for uranium minerals with a range of chemical compositions. This method combines the advantages of conventional U–Pb dating (i.e., use of concordia) and in situ analysis, and therefore is ideally suited for the study of chemically complex and fine-grained uranium oxides associated with urani...
متن کاملMineralogy and geochemistry of the Hajiabad manganese deposit, Hormozgan province
The Hajiabad manganese deposit is located about 40 km northeast of Hajiabad, Hormozgan Province. This deposit is structurally located in the southeastern border of the Sanandaj-Sirjan zone. The manganese mineralization in the study area is hosted by calcite-dolomitic marbles and mica schists of Devonian age, as layers, veins and massive ores. Based on microscopic investigations, the ores are do...
متن کاملThe Social Semantic Web in Intelligent Learning Environments: state of the art and future challenges
Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia; School of Computing and Information Systems, Athabasca University, Athabasca, Canada; The Center for Interactive Smart Oilfield Technologies, University of Southern California, Los Angeles, California, USA; Department of Computer Science, University of Saskatchewan, Saskatoon, Canada; School of Interactive Arts and Te...
متن کامل