Results 241 to 250 of about 32,006 (319)
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, 2020
The Xiaoqinling gold field, located along the southern margin of the North China craton, is the second largest gold producer in China, which comprises more than 1,200 auriferous quartz veins with a proven gold reserve of at least 800 tons.
Junchen Liu +7 more
semanticscholar +1 more source
The Xiaoqinling gold field, located along the southern margin of the North China craton, is the second largest gold producer in China, which comprises more than 1,200 auriferous quartz veins with a proven gold reserve of at least 800 tons.
Junchen Liu +7 more
semanticscholar +1 more source
Contributions to Mineralogy and Petrology, 2007
Back-scattered electron (BSE) imaging and X-ray element mapping of monazite in low-grade metasedimentary rocks from the Paleoproterozoic Stirling Range Formation, southwestern Australia, reveal the presence of distinct, high-Th cores surrounded by low-Th, inclusion-rich rims.
Birger Rasmussen, Janet R. Muhling
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Back-scattered electron (BSE) imaging and X-ray element mapping of monazite in low-grade metasedimentary rocks from the Paleoproterozoic Stirling Range Formation, southwestern Australia, reveal the presence of distinct, high-Th cores surrounded by low-Th, inclusion-rich rims.
Birger Rasmussen, Janet R. Muhling
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, 2020
Sapphirine-bearing UHT granulites from the Dongpo locality in the Khondalite Belt of the North China Craton have been comprehensively characterized in terms of petrology, mineral chemistry, metamorphic evolution and zircon geochronology.
S. Jiao +5 more
semanticscholar +1 more source
Sapphirine-bearing UHT granulites from the Dongpo locality in the Khondalite Belt of the North China Craton have been comprehensively characterized in terms of petrology, mineral chemistry, metamorphic evolution and zircon geochronology.
S. Jiao +5 more
semanticscholar +1 more source
Geological Magazine, 2020
This paper presents three different age domains, obtained by electron microprobe monazite dating, for granulitic gneisses collected from the Shillong-Meghalaya Gneissic Complex in Sonapahar, NE India, which contain radioactive materials, e.g.
S. B. Dwivedi, K. Theunuo, R. Kumar
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This paper presents three different age domains, obtained by electron microprobe monazite dating, for granulitic gneisses collected from the Shillong-Meghalaya Gneissic Complex in Sonapahar, NE India, which contain radioactive materials, e.g.
S. B. Dwivedi, K. Theunuo, R. Kumar
semanticscholar +1 more source
Monazite chemical composition: some implications for monazite geochronology
Contributions to Mineralogy and Petrology, 1999An investigation of the chemical composition of monazite from a number of localities has been carried out. Samples used include monazites from metamorphic rocks, granitic rocks and a hydrothermal ore deposit. The REE distribution pattern of monazite varies greatly in accordance with its geological environment.
X. K. Zhu, R. K. O'Nions
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American Mineralogist, 2020
The alteration of magmatic monazite and its consequences for monazite geochronology are explored in granitoids from the western part of the Ryoke belt (Iwakuni-Yanai area, SW Japan). Biotite-granite samples were collected in two plutons emplaced slightly
E. Skrzypek, S. Sakata, D. Sorger
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The alteration of magmatic monazite and its consequences for monazite geochronology are explored in granitoids from the western part of the Ryoke belt (Iwakuni-Yanai area, SW Japan). Biotite-granite samples were collected in two plutons emplaced slightly
E. Skrzypek, S. Sakata, D. Sorger
semanticscholar +1 more source
Monazite Behaviour during Metamorphic Evolution of a Diamond-bearing Gneiss
, 2020We studied monazite behaviour in UHP diamond-bearing gneiss from Saxnäs in the Seve Nappe Complex of the Scandinavian Caledonides (Petrík et al., 2019).
I. Petrik +8 more
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A scheme for the analysis of monazite and monazite concentrates
Analytica Chimica Acta, 1963Abstract A scheme using ion-exchange methods is described for the analysis of monazites and monazite concentrates. The sample is opened up with concentrated sulphuric acid, and the resultant solution is applied to a column of Zeocarb 225 resin. After phosphate has been washed out, lead, aluminium, titanium, iron, uranium, calcium and magnesium are ...
K.S. Chung, J.P. Riley
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Industrial & Engineering Chemistry, 1961
A laboratory scale chlorination of Egyptian monazite sand concentrate was carried out at 900 deg C in a horizontal tube furnace, and the variables affecting the condensation and purity of the thorium chloride produced were studied. In 30 minutes, 97.8% of the monazite content was attacked.
O. M. Hilal, F. A. El. Gohary
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A laboratory scale chlorination of Egyptian monazite sand concentrate was carried out at 900 deg C in a horizontal tube furnace, and the variables affecting the condensation and purity of the thorium chloride produced were studied. In 30 minutes, 97.8% of the monazite content was attacked.
O. M. Hilal, F. A. El. Gohary
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Chemical Geology, 2008
Abstract Diffusion of Th has been characterized in synthetic monazite under dry conditions. The synthetic monazites (either pure CePO4, NdPO4, or a mixed LREE phosphate containing Ce, Nd, and Sm) were grown via a Na2CO3–MoO3 flux method. The sources of diffusant for the experiments were either synthesized ThSiO4 or CaTh(PO4)2 powders mixed with CePO4.
D.J. Cherniak, J.M. Pyle
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Abstract Diffusion of Th has been characterized in synthetic monazite under dry conditions. The synthetic monazites (either pure CePO4, NdPO4, or a mixed LREE phosphate containing Ce, Nd, and Sm) were grown via a Na2CO3–MoO3 flux method. The sources of diffusant for the experiments were either synthesized ThSiO4 or CaTh(PO4)2 powders mixed with CePO4.
D.J. Cherniak, J.M. Pyle
openaire +1 more source