scholarly journals Critical metal mineralogy and ore genesis revisited: thematic set arising from the Third International Critical Metals Meeting, Edinburgh

2020 ◽  
Vol 84 (1) ◽  
pp. 1-3
Author(s):  
Eimear Deady ◽  
Sam Broom-Fendley
Keyword(s):  
Critical Metals ◽  
Ore Genesis ◽  
The Third ◽  
Critical Metal

scholarly journals Complex Concentrated Alloys for Substitution of Critical Raw Materials in Applications for Extreme Conditions

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1197
Author(s):  
Dumitru Mitrica ◽  
Ioana Cristina Badea ◽  
Beatrice Adriana Serban ◽  
Mihai Tudor Olaru ◽  
Denisa Vonica ◽  
...  
Keyword(s):  
Raw Materials ◽  
Extreme Environment ◽  
Extreme Conditions ◽  
The European Union ◽  
Critical Metals ◽  
Research Directions ◽  
Level Of Involvement ◽  
General Evaluation ◽  
Critical Metal ◽  
Critical Raw Materials

The paper is proposing a mini-review on the capability of the new complex concentrated alloys (CCAs) to substitute or reduce the use of critical raw materials in applications for extreme conditions. Aspects regarding the regulations and expectations formulated by the European Union in the most recent reports on the critical raw materials were presented concisely. A general evaluation was performed on the CCAs concept and the research directions. The advantages of using critical metals for particular applications were presented to acknowledge the difficulty in the substitution of such elements with other materials. In order to establish the level of involvement of CCAs in the reduction of critical metal in extreme environment applications, a presentation was made of the previous achievements in the field and the potential for the reduction of critical metal content through the use of multi-component compositions.

Electrochemical product engineering towards sustainable recovery and manufacturing of critical metals

2021 ◽  
Author(s):  
Yunting Wang ◽  
Yudong Xue ◽  
Chunhui Zhang
Keyword(s):  
Modern Society ◽  
Supply Risk ◽  
Critical Metals ◽  
Central Focus ◽  
Critical Metal ◽  
Product Engineering ◽  
Metal Products ◽  
Uncertain Supply ◽  
Sustainable Recovery

Critical metal products play an irreplaceable role in all aspects of modern society, however, uncertain supply risk pushed their sustainable recycling and manufacturing falling in the central focus. Compared to...

scholarly journals Critical-metal mineralogy and ore genesis: contributions from the European Mineralogical Conference held in Rimini, September 2016

2018 ◽  
Vol 82 (S1) ◽  
pp. S1-S4 ◽  
Author(s):  
John F. W. Bowles ◽  
Nigel J. Cook ◽  
Krister Sundblad ◽  
Erik Jonsson ◽  
Eimear Deady ◽  
...  
Keyword(s):  
Ore Genesis ◽  
Critical Metal

scholarly journals Impact of transport electrification on critical metal sustainability with a focus on the heavy-duty segment

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Han Hao ◽  
Yong Geng ◽  
James E. Tate ◽  
Feiqi Liu ◽  
Kangda Chen ◽  
...  
Keyword(s):  
Heavy Duty ◽  
Critical Metals ◽  
Policy Makers ◽  
Light Duty ◽  
Critical Metal ◽  
Battery Capacity ◽  
Single Vehicle ◽  
Research Gap ◽  
Light Duty Vehicles ◽  
Heavy Duty Vehicles

AbstractThe majority of transport electrification studies, examining the demand and sustainability of critical metals, have focused on light-duty vehicles. Heavy-duty vehicles have often been excluded from the research scope due to their smaller vehicle stock and slower pace of electrification. This study fills this research gap by evaluating the lithium resource impacts from electrification of the heavy-duty segment at the global level. Our results show that a mass electrification of the heavy-duty segment on top of the light-duty segment would substantially increase the lithium demand and impose further strain on the global lithium supply. The significant impact is attributed to the large single-vehicle battery capacity required by heavy-duty vehicles and the expected battery replacement needed within the lifetime of heavy-duty vehicles. We suggest that the ambition of mass electrification in the heavy-duty segment should be treated with cautions for both policy makers and entrepreneurs.

scholarly journals Critical Metal Particles in Copper Sulfides from the Supergiant Río Blanco Porphyry Cu–Mo Deposit, Chile

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 519 ◽  
Author(s):  
Jorge Crespo ◽  
Martin Reich ◽  
Fernando Barra ◽  
Juan Verdugo ◽  
Claudio Martínez
Keyword(s):  
Noble Metals ◽  
Porphyry Copper ◽  
Alteration Zone ◽  
Limited Information ◽  
Critical Metals ◽  
Potassic Alteration ◽  
Copper Sulfides ◽  
Porphyry Cu ◽  
Critical Metal ◽  
Te Inclusions

Porphyry copper–molybdenum deposits (PCDs) are the world’s most important source of copper, molybdenum and rhenium. Previous studies have reported that some PCDs can have sub-economic to economic grades of critical metals, i.e., those elements that are both essential for modern societies and subject to the risk of supply restriction (e.g., platinum group elements (PGE), rare earth elements (REE), In, Co, Te, Ge, Ga, among others). Even though some studies have reported measured concentrations of Pd and Pt in PCDs, their occurrence and mineralogical forms remain poorly constrained. Furthermore, these reconnaissance studies have focused predominantly on porphyry Cu–Au deposits, but very limited information is available for porphyry Cu–Mo systems. In this contribution, we report the occurrence of critical metal (Pd, Pt, Au, Ag, and Te) inclusions in copper sulfides from one of the largest PCDs in the world, the supergiant Río Blanco-Los Bronces deposit in central Chile. Field emission scanning electron microscope (FESEM) observations of chalcopyrite and bornite from the potassic alteration zone reveal the presence of micro- to nano-sized particles (<1–10 μm) containing noble metals, most notably Pd, Au, and Ag. The mineralogical data show that these inclusions are mostly tellurides, such as merenskyite ((Pd, Pt) (Bi, Te)2), Pd-rich hessite (Ag2Te), sylvanite ((Ag,Au)Te2) and petzite (Ag3AuTe2). The data point to Pd (and probably Pt) partitioning in copper sulfides during the high-temperature potassic alteration stage, opening new avenues of research aimed at investigating not only the mobility of PGE during mineralization and partitioning into sulfides, but also at exploring the occurrence of critical metals in porphyry Cu–Mo deposits.

scholarly journals Metasomatic iron and alkali calcic (MIAC) system frameworks: a TGI-6 task force to help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits

2021 ◽  
Author(s):  
L Corriveau ◽  
J -F Montreuil ◽  
O Blein ◽  
E Potter ◽  
M Ansari ◽  
...  
Keyword(s):  
Iron Oxide ◽  
First Nations ◽  
Task Force ◽  
Mineral Exploration ◽  
Critical Metals ◽  
Near Surface ◽  
Critical Metal ◽  
Wide Range ◽  
Metamorphic Terranes ◽  
Mining Districts

Australia's and China's resources (e.g. Olympic Dam Cu-U-Au-Ag and Bayan Obo REE deposits) highlight how discovery and mining of iron oxide copper-gold (IOCG), iron oxide±apatite (IOA) and affiliated primary critical metal deposits in metasomatic iron and alkali-calcic (MIAC) mineral systems can secure a long-term supply of critical metals for Canada and its partners. In Canada, MIAC systems comprise a wide range of undeveloped primary critical metal deposits (e.g. NWT NICO Au-Co-Bi-Cu and Québec HREE-rich Josette deposits). Underexplored settings are parts of metallogenic belts that extend into Australia and the USA. Some settings, such as the Camsell River district explored by the Dene First Nations in the NWT, have infrastructures and 100s of km of historic drill cores. Yet vocabularies for mapping MIAC systems are scanty. Ability to identify metasomatic vectors to ore is fledging. Deposit models based on host rock types, structural controls or metal associations underpin the identification of MIAC-affinities, assessment of systems' full mineral potential and development of robust mineral exploration strategies. This workshop presentation reviews public geoscience research and tools developed by the Targeted Geoscience Initiative to establish the MIAC frameworks of prospective Canadian settings and global mining districts and help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. The knowledge also supports fundamental research, environmental baseline assessment and societal decisions. It fulfills objectives of the Canadian Mineral and Metal Plan and the Critical Mineral Mapping Initiative among others. The GSC-led MIAC research team comprises members of the academic, private and public sectors from Canada, Australia, Europe, USA, China and Dene First Nations. The team's novel alteration mapping protocols, geological, mineralogical, geochemical and geophysical framework tools, and holistic mineral systems and petrophysics models mitigate and solve some of the exploration and geosciences challenges posed by the intricacies of MIAC systems. The group pioneers the use of discriminant alteration diagrams and barcodes, the assembly of a vocab for mapping and core logging, and the provision of field short courses, atlas, photo collections and system-scale field, geochemical, rock physical properties and geophysical datasets are in progress to synthesize shared signatures of Canadian settings and global MIAC mining districts. Research on a metamorphosed MIAC system and metamorphic phase equilibria modelling of alteration facies will provide a foundation for framework mapping and exploration of high-grade metamorphic terranes where surface and near surface resources are still to be discovered and mined as are those of non-metamorphosed MIAC systems.

scholarly journals Critical metal particles in copper sulfides from the supergiant Río Blanco porphyry Cu-Mo deposit, Chile

2018 ◽  
Author(s):  
Jorge Crespo ◽  
Martin Reich ◽  
Fernando Barra ◽  
Juan José Verdugo ◽  
Claudio Martínez
Keyword(s):  
Noble Metals ◽  
Porphyry Copper ◽  
Alteration Zone ◽  
Limited Information ◽  
Critical Metals ◽  
Potassic Alteration ◽  
High Resolution Data ◽  
Copper Sulfides ◽  
Porphyry Cu ◽  
Critical Metal

Porphyry copper-molybdenum deposits (PCDs) are the world’s most important source of copper, molybdenum and rhenium. Previous studies have reported that some PCDs can have sub-economic to economic grades of critical metals, i.e., those elements that are both essential for modern societies and subject to the risk of supply restriction (e.g., platinum group elements (PGE), rare earth elements (REE), In, Co, Te, Ge, Ga, among others). Even though some studies have reported measured concentrations of Pd and Pt in PCDs, their occurrence and mineralogical form remain poorly constrained. Furthermore, these reconnaissance studies have focused predominantly on porphyry Cu-Au deposits, but very limited information is available for porphyry Cu-Mo systems. In this contribution, we report the occurrence of critical metal (Pd, Pt, Au, Ag, and Te) inclusions in copper sulfides from the world’s largest PCD, the supergiant Río Blanco-Los Bronces deposit in central Chile. Field emission scanning electron microscope (FESEM) observations of chalcopyrite and bornite from the potassic alteration zone reveal the presence of micro- to nano-sized particles (&lt;1-10 μm) of noble metals, most notably Pd, Au, and Ag. The high-resolution data show that these inclusions are mostly tellurides, such as merenskyite [PdTe2], Pd-rich hessite [Ag2Te], sylvanite [(Ag, Au)Te2] and petzite [Ag3AuTe2]. The data point to Pd (and probably Pt) partitioning in copper sulfides during the high-temperature potassic alteration stage, opening new avenues of research aimed at investigating not only the mobility of PGE during mineralization and partitioning into sulfides, but also at evaluating the potential of porphyry Cu-Mo deposits as a source for noble metals.

scholarly journals Effect of Regulation on the Increasing Price of Metals and Minerals to Meet the Challenges in Clean Energy Transitions: A Case Study of China

2022 ◽  
Vol 14 (2) ◽  
pp. 764
Author(s):  
Lin Xu ◽  
Zhenwei Guo
Keyword(s):  
High Performance ◽  
Clean Energy ◽  
Global Scale ◽  
Fair Price ◽  
Critical Metals ◽  
Consumer Country ◽  
Critical Metal ◽  
Metal Support ◽  
Performance Computing

Considering that the development of science and technology depends on metal support, the EU, USA, and China have issued a critical metal list on the development report. However, the scarce and important mineral deposits on a global scale will not be enough to meet the huge needs of economic development in the future. Many fields such as renewable energy, high-performance computing, and AI all require critical metals as essential supports. A proper price regulation of such important metals will contribute to the fair price power on the international market. In this paper, the pricing history and strategy of critical metal support are fully studied and discussed. Since China has become a major consumer country, China should gain fair price power in the market of important metals.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

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