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A practical handbook for drilling fluids processing / Практическое руководство по буровым растворам

Автор(ы):Bridges S., Robinson L.
Издание:Elsevier, 2020 г., 593 стр., ISBN: 978-0-12-821341-4
Язык(и)Английский
A practical handbook for drilling fluids processing / Практическое руководство по буровым растворам

This book concentrates on properly treating drilling fluid in the surface systems including a detailed discussion of the three required sections: suction, addition, and removal. The single, most important function of a drilling fluid is to prevent ablowout and to be able to control a kick if one does occur. For this reason, the first subject addressed in this book is the fluid processing required to handle a kick. For safety, in anticipation of a kick, the drilling fluid within the drill pipe should have the same density avoiding sag, settling, and uneven density in the annulus that could lead to a kick. To achieve these conditions, the surface system must be able to blend a sufficient quantity of homogeneous fluid. The agitation and blending of this fluid is discussed and proper calculations related to ensuring the proper properties 

ТематикаБурение
МеткиБурение (679), Буровые растворы (42), Практическое руководство (107)
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A practical introduction to optical mineralogy / Практическое введение в оптическую минералогию

Автор(ы):Gribble C.D., Hall A.J.
Издание:George Allen & Unwin Ltd, London, 1985 г., 262 стр., ISBN: 978-94-011-7806-8
Язык(и)Английский
A practical introduction to optical mineralogy / Практическое введение в оптическую минералогию

Microscopy is a servant of all the sciences, and the microscopic examination of minerals is an important technique which should be mastered by all students of geology early in their careers. Advanced modern textbooks on both optics and mineralogy are available, and our intention is not that this new textbook should replace these but that it should serve as an introductory text or a first stepping-stone to the study of optical mineralogy. The present text has been written with full awareness that it will probably be used as a laboratory handbook, serving as a quick reference to the properties of minerals, but nevertheless care has been taken to present a systematic explanation of the use of the microscope as well as theoretical aspects of optical mineralogy. The book is therefore suitable for the novice either studying as an individual or participating in classwork. <...> 

ТематикаМинералогия, Петрография
МеткиМикроскопические методы исследования (36), Оптическая минералогия (10), Практическое руководство (107)
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A practical long-term production scheduling model in open pit mines using integer linear programming / Практическая модель долгосрочного производственного планирования на открытых карьерах с использованием целочисленного линейного программирования

Автор(ы):Gholamnejad J., Kasmaeeyazdi S., Lotfian R.
Издание:2020 г., 6 стр.
Язык(и)Английский
A practical long-term production scheduling model in open pit mines using integer linear programming / Практическая модель долгосрочного производственного планирования на открытых карьерах с использованием целочисленного линейного программирования

Long-term production scheduling is a major step in open pit mine planning and design. It aims to maximize the net present value (NPV) of the cash flows from a mining project while satisfying all the operational constraints, such as grade blending, ore production, mining capacity, and pit slope during each scheduling period. Long-term plans not only determine the cash flow generated over the mine life, but are also the basis for medium- and short-term production scheduling. Mathematical programming methods, such as linear programming, mixed integer linear programming, dynamic programming, and graph theory,

ТематикаОткрытые горные выработки
МеткиГорное планирование (14), Карьер (84), Открытые горные работы (224), Разработка месторождений (152)
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A process mineralogical evaluation of chromite at the Nkomati Nickel Mine, Uitkomst Complex, South Africa / Процесс минералогической оценки хромита на никелевом руднике Нкомати, комплекс Уиткомст, Южная Африка

Автор(ы):Dzvinamurungu T., Mulaba-Bafubiandi A.F., Rose D.H., Viljoen K.S.
Издание:MDPI, 2020 г., 27 стр.
Язык(и)Английский
A process mineralogical evaluation of chromite at the Nkomati Nickel Mine, Uitkomst Complex, South Africa / Процесс минералогической оценки хромита на никелевом руднике Нкомати, комплекс Уиткомст, Южная Африка

A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. Chromite is a by-product of the Ni-Cu-Co-PGE ore at Nkomati Nickel mine. These being the PCMZ_MG (medium-grade Ni-Cu sulphide silicate ore with disseminated chromite), PCMZ_HG (high-grade Ni-Cu sulphide silicate ore containing disseminated chromite) and MCHR (massive chromite unit) ore types. These were processed using benchtop flotation followed by gravity concentration using a shaking table at different grind sizes.

ТематикаПолезные ископаемые
МеткиАфрика (74), Комплекс Уиткомст , Никель (118), Рудник Нкомати , Хром (36), Хромит (3), Южная Африка (6)
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A rapid field analytical method for gold in geochemical exploration / Быстрый полевой аналитический метод определения золота при геохимической разведке

Выпуск 55
Автор(ы):Xiaoling W., Yinxiu L.
Издание:Journal of Geochemical Exploration, 1995 г., 5 стр.
Язык(и)Английский
A rapid field analytical method for gold in geochemical exploration / Быстрый полевой аналитический метод определения золота при геохимической разведке

A rapid field method for gold analysis in geochemical exploration has been developed. Cold extraction of Au, at room temperature, using a mixture of sodium bromide, sulphuric acid, hydrogen peroxide is performed; the technique has the advantage of avoiding the irritating odour of commonly used aqua regia digestion. Polyurethane foam is used to concentrate gold from solution. After desorption of Au using mixed reagents (0.5% Na2S03-NaCl solution at pH 8), two sequential procedures, depending on the concentration, are followed for the determination of gold. (1) A 1 mL portion of desorbed solution is used to form Au-TMK-DBS (Thio Micher's Ketone and dodecyl benzene sodium sulphonate) ternary complex. Concentrations below 20 ng/g Au are determined by visual colour comparison of the organic layer with a series of standards. (2) If the concentration is greater than 20 ng/g Au, a complexation reaction using the same reagents is followed by fibre-optic colorimetry. The method is rapid and simple, and the tiresome operation of ashing the foam is avoided. The limit of detection is 0.5 ng/g Au and eighty determinations can be made in one working day. The method could be used for rapid follow-up of rock sample or in situ drill core analyses. About 600 samples from 5 gold districts were tested by this method. The results are very satisfactory.

ТематикаПолезные ископаемые
МеткиГеохимические исследования (13), Золото (973), Полевые исследования (9)
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A review of intermediate sulfidation epithermal deposits and subclassification / Обзор эпитермальных отложений месторождений формации "средне-сульфидных" ("средне-серных") и их подклассификация

Автор(ы):Li G.-M., Qin K.-Z., Song G.-X., Wang L.
Издание:2019 г., 23 стр.
Язык(и)Английский
A review of intermediate sulfidation epithermal deposits and subclassification / Обзор эпитермальных отложений месторождений формации "средне-сульфидных" ("средне-серных") и их подклассификация

Intermediate sulfidation (IS) veins is one of the subtypes of epithermal deposits formed in subduction-related arc settings or post-collisional orogenic belts. The economic and scientific significance of IS deposits has been highlighting importance in Ag-Au-Pb-Zn exploration and study of porphyry-epithermal systems.

ТематикаГеохимия, Полезные ископаемые
МеткиЭпитермальные месторождения золота (27), Эпитермальный рудогенез (32)
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A review of the copper prospectivity of the Tethyan metallogenic belt / Обзор медных перспектив Тетианского металлогенического пояса

Издание:2012 г., 180 стр.
Язык(и)Английский
A review of the copper prospectivity of the Tethyan metallogenic belt / Обзор медных перспектив Тетианского металлогенического пояса

SRK Exploration Services (SRK ES) has been requested by Metals and Minerals Group (MMG), to undertake a prospectivity review of the Tethyan Metallogenic Belt with the aim of identifying regions with the potential to host ‗Tier 1‘ copper deposits (containing the equivalent of >500 Mt at 1% Cu). MMG have expressed a primary interest in identifying large porphyry copper deposits at any stage of development, but area also interested in the potential of high sulphidation epithermal, sedimentary and IOCG (iron-oxide-copper-gold), polymetallic VHMS (volcanic hosted massive sulphide) and sediment-hosted Pb-Zn prospects. This review has examined the potential for these types of deposit across 20 individual countries from Poland through to Pakistan. <...>

ТематикаПолезные ископаемые
МеткиМедь (299), Металлогения (267), Отчет (68)
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A Review of the Geology and Mineralisation of the Alumbrera Porphyry Copper-Gold Deposit, Northwestern Argentina.

Автор(ы):Brown S.C.
Издание:PGS Publishing, Linden Park, 2005 г., 16 стр.
Язык(и)Английский
A Review of the Geology and Mineralisation of the Alumbrera Porphyry Copper-Gold Deposit, Northwestern Argentina.

The Bajo de la Alumbrera porphyry copper-gold deposit is located within the northern Sierras Pampeanas in the eastern Andes Mountains of northwestern Argentina. It formed in a tectonically favourable location within a major arc-oblique wrench fault system, the Tucuman Transfer Zone. Initial andesitic volcanism deposited on crystalline Lower Palaeozoic basement, and subsequently emplaced dacitic subvolcanic stocks are directly related to eastward subduction of the Nazca oceanic plate beneath the western continental margin of South America. Structural preparation and shallowing of the angle of subduction of the Nazca plate -related to the arc-normal Juan Fernandez Ridge on that plate - probably aided the ascent of calc-alkaline oceanic arc-related magma into the Tucuman Transfer Zone.

ТематикаПолезные ископаемые
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