Pulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA Roughly 15 cm long quartz crystal with purple fluorapatite. Harvard Museum no. 97963.
Rare Earth Elements (REEs) are critical for the production of many advanced materials and products. Mining and primary production of REEs are generally associated with significant environmental impacts. By recovery of REEs from secondary sources, through recycling or...
The first commercial production of phosphate rock began in England in 1847. A wide variety of techniques and equipment is used to mine and process phosphate rocks in order to beneficiate low-grade ores and remove impurities. The eighth chapter of this book deals with mining and beneficiation of phosphate ore. The principle and operating conditions of important …
Flotation is one of the most efficient techniques applied to phosphate upgrading. This paper aimed to investigate the effect of operating parameters, including collector dosage, …
To constrain the tectonothermal evolution of the type locality for iron oxide-apatite deposits, we have obtained U-Pb zircon, titanite, and apatite age data for the Kiruna mining district in ...
Pulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA Dimensions: 8 mm x 4 mm x 4 mm A superb violet coloured gemmy Apatite from Maine, USA. Though very small, this is an exquisite crystal with wonderful colour, excellent lustre and a well formed crystal shape. Size: 8mm x 4mm x 4mm
Mining residues. The material used for granulation is a waste resulting from extraction and processing of an apatite ore, initially hosted in mafic layers, and essentially comprised of apatite, Fe and Ti oxides (magnetite and ilmenite), olivine, plagioclase and clinopyroxene (Tollari et al., 2008). After crushing, the magnetic fraction and the ...
Geological setting and mineral composition of (apatite)-nepheline-titanite ore from the Khibiny massif enable selective mining of titanite ore, and its processing with sulfuric-acid method, without preliminary concentration in flotation cells. In this process flow diagram, titanite losses are reduced by an order of magnitude in comparison with a conventional flotation …
3 reviews and 46 photos of MOUNT APATITE "Need an adventure that not only takes you past military vehicles, hikes you up a small mountain, but also gives you a mining experience?? This is the place! With a short walk straight up the main trail you will find numerous dig spots that hold numerous types of rocks including Apatite, Tourmaline, and Quartz.
22. Conclusion Apatite deposit is a non-renewable natural resource situated in a traditional village environment Environmental aspects as well as social issues at Eppawala village should be given utmost consideration Alternative industries suggested above may reduce possible environment hazards and minimize social problems Rate of exploitation of this deposit should …
The results of investigations aimed at solving the topical problem of geodynamic risk assessment in mining of the Khibiny rockburst-hazardous deposits in the Kola Peninsula are …
The Maine Feldspar Co. leased the area in 1902 which resulted in the largest commercial mining excavation at Mount Apatite. Feldspar was mined chiefly for the china and porcelain industry and was first transported to Topsham and later two miles south to their processing plant, established in 1906, at Littlefield Station.
The article reports research findings on flotation of apatite from brazilite-apatite-magnetite ore by domestic and foreign manufacture reagents. The agents Phospholan PE65 and Arcomon SO exhibit higher selectivity as compared to saponified tall oil fatty acids.
The results of investigations aimed at solving the topical problem of geodynamic risk assessment in mining of the Khibiny rockburst-hazardous deposits in the Kola Peninsula are presented. The developed procedures and approaches contribute to minimization of geodynamic risks under large-scale mining of close-spaced apatite-nepheline ore deposits. The …
Primary economical deposits of rare-earth elements (REEs) are exhausting all over the world, and it has become necessary to find new sources and methods for their extraction. In addition, increasing the application of REEs in modern technological society has increased its demand globally. One of the important movements to compensate for the future shortages of …
As such, apatite ((Ca 5 (PO 4) 3)(F, Cl, or OH)) in apatite-iron tailings has become an essential source of phosphates for agricultural purposes. Tailings repositories pose an environmental concern 1 − 3 and, in some cases, present reprocessing opportunities. 3, 4 Due to the stricter environmental regulation, mining houses are under pressure ...
AbstractThe article describes the experience in which the argumented parameters of the sublevel caving system in the conditions of mining operations take into account the Khibiny apatite …
Scandium is a critical element in state-of-the-art, green technologies. However, it is also extremely expensive due to its scarcity. Recently, some deep-sea sediments that contain significant amounts of rare-earth elements that are indispensable to modern industries have been discovered in the western North Pacific Ocean, and the concentration of Sc in these sediments …
Apatite ore quality declines, fertilizer businesses face difficulties. Mr. Tran Dai Nghia, Deputy General Director of Lam Thao Super Phosphate and Chemical Joint Stock Company said: In recent years, the production of …
History & Mining Locations. As Apatite is a recently discovered mineral, there are no legends associated with its history. German geologist Abraham Gottlob Werner gave Apatite its name in 1786. ... This is a great stone to use if you have joint problems, arthritis or if you need to relearn motor skills. Finally, this crystal can also help ...
During 2022, discussions amongst mining executives have continued to focus on emerging economies. It was in September of this year that EY Global (Ernst and Young) published an important report: "Top 10 business risks and opportunities for mining and metals in 2023." Their experts concluded that "ESG still tops the agenda for mining and metals […]
Journal of Mining Science - A. E. Fersman, "New problems in research on mineral raw material," Usp. Khim., '1, No. 1 (1932). T. N. Ivanova, Apatite Deposits of ...
This 3 to 4 mm bit of apatite was the first apatite found at the Pulsifer Quarry in 26 years. Courtesy Tony Wielkiewicz A Personal Account. Dudy Groves, in addition to mining at the Pulsifer Quarry, built the Poland Mining …
The results of investigations aimed at solving the topical problem of geodynamic risk assessment in mining of the Khibiny rockburst-hazardous deposits in the Kola Peninsula are presented.
Intense technologic dynamical impacts on the rockmass, on account of peculiarities of mining technology application along with huge blasting (up to 350 t. of trinitrotoluol equivalent). Large …
The International Mineralogical Association refers to the mineral as Apatite-(CaOH). This distinguishes it from the other two variants of Apatite, Apatite-(CaF) [Fluorapatite] and Apatite-(CaCl) [Chlorapatite]. Erionite Tiny crystals of Erionite can be damaging to human health. Credit: Leon Hupperichs under CCASA3.0.
Based on the paragenetic relations and textural data, the CL-dark apatite is considered to have crystallized coevally with the ore minerals, whereas the CL-bright apatite is interpreted to be of magmatic origin that were inherited from porphyry dikes widely distributed in the mine, with some being eroded or strongly altered by the ore-forming ...
The article describes the experience in which the argumented parameters of the sublevel caving system in the conditions of mining operations take into account the Khibiny apatite-nepheline …
Mining Method Selection (MMS) is the first and the most critical problem in mine design, and depends on some parameters such as the geo-technical and geological features and economic factors. The factors affecting MMS are determined by some mining experts, and the most suitable mining method is selected using the hesitant fuzzy group decision-making (HFGDM) and …
Froth flotation of apatite is one of the main methods of mining the mineral from host ores [61]. Selecting the correct reagents is important in optimizing the process. ... [91], in contrast investigated five samples of apatite from different areas of the Salitre deposit in Brazil due to problems with processing of the apatite. They found IEP ...
1 Mining University, Saint-Petersburg, Russia. 2 'Apatit', Kirovsk, Russia. * Corresponding author: [email protected] Abstract. The article describes the experience in which the argumented parameters of the sublevel caving system in the conditions of mining operations take into account the Khibiny apatite-nepheline deposits.
Confusion between Carbonate Apatite and Biological Apatite. Biological apatite in enamel, dentin, cementum, and bone is highly individualized hydroxyapatite with high tissue dependency. Often, standard and average textbook values for biological apatite do not apply to actual subjects, and the reported results of analyses differ among investigators.
The mining and processing of phosphate ore (apatite) continues to be the dominant pathway of yielding phosphorus-based fertilizers (i.e., diammonium phosphate) . However, the raw ore does not possess the water solubility to truly be an effective fertilizer source, and the concentration of phosphate (P 2 O 5 ) in the raw ore does not possess the ...
Green Apatite is a wonderful talisman for problems with the physical heart, including heart disease and heart-attacks. It is especially good if chronic stress and unhealthy habits have contributed to the problem. ... Apatite may also be found as an accessory gem in a large range of mining environments, ranging from huge open pits to small mines ...
Apatite crystals are a favorite among collectors with their stubby, terminated, hexagonal prisms, glassy transparency, and soft, yellow-to-greenish-yellow or blue mineral colors.These beautiful crystals rank high on blue gems and minerals lists.Much is mined in Mexico.. However, most of the apatite in the Earth's crust occurs not as macrocrystals, but in …
Mining Method Selection (MMS) is the first and the most critical problem in mine design, and depends on some parameters such as the geo-technical and geological features and economic factors.
The problems to be solved to continue extraction of apatite–nepheline ore at minimized induced risks and at the preserved economic efficiency are listed. The article highlights the urgency of studying processes of deformation, displacement and collapse of undermined …
Seven decades of mining activity on the Khibiny apatite–nepheline ore deposits and current large excavation volumes have resulted in elevated concentrations of total dissolved solids and metals in various waters near the mines. To assess the major sources of pollution inputs and fate of pollutants in watercourses draining the mine workings, snow cover, surface waters, and …