В настоящее время объем проб в практике поисков и разведки месторождений рассчитывается редко. Опробование ведется в соответствии с методическими указаниями и рекомендациями технически удобным способом. Коренные месторождения золота опробуют преимущественно бороздами сечением 5-10 см. При длине 1 м такая проба весит около 12 кг. Она помещается в стандартный пробный мешок и не слишком тяжелая для переноски и ручных погрузочно-разгрузочных работ. При разведке бурением пробы имеют еще меньший объем и массу. Здесь на первом месте стоит производительность бурения. Обычный диаметр скважин на руде составляет 59 или 46 мм, диаметр керна еще меньше. В итоге масса керновой пробы составляет всего несколько килограммов.
Технически удобный объем проб часто применяют и на россыпях. В основном разведку ведут бурением 200 мм, а иногда 150 мм, т. к. производительность бурения высокая и стоимость проходки скважин относительно приемлемая. <...>

Методика касается технологии проведения работ по подготовке к анализам проб руд драгоценных металлов, содержащих  свободное золото, и рекомендуется к применению при  геологическом изучении недр, а также при определении содержания золота в продуктах  обогащения руд при выполнении научно-исследовательских работ и промышленной эксплуатации месторождений руд драгоценных металлов.  
Настоящая методика соответствует требованиям ГОСТ 14180-80,  ОСТ 48-276-86 и ОСТ 41-08-249-85 в части методов отбора и подготовки проб, конкретизированных в соответствующих разделах методики.

The book: Geology and Mineral Resources, by Dr. R. K. Upadhyay starts with a brief introduction about the universe, its galaxies, solar systems, various planets including our own “mother earth”. Mineral resources and the various geological dynamic processes of the Earth have left their imprints on human kind and helped shape their history.

Not long ago Business Week, in a feature story entitled “Now the Squeeze on Metals,” warned ominously: America's industrial might—already threatened by the deepening energy mess—is in for another resource crunch. . . . All signs point to longer-range problems in U.S. mineral supply that will not be solved by cyclic swings in the economy. If not solved, those problems could make U.S. business less competitive, lower America’s standard of living, and endanger the national security.

This book aims to give the first comprehensive explanation of the metallogenic areas of Fennoscandia, which have recently been described in the Metallogenic Map of the Fennoscandian Shield. The Fennoscandian metallogenic map shows the extent of presently known metallogenic areas.

As a country rich in mineral resources, contemporary China remains surprisingly overlooked in the research about the much debated ‘resourcecurse’. This is the first full-length study to  examine the distinctive effects of mineral resources on the state, capital and labour and their interrelations in China. Jing Vivian Zhan draws on a wealth of empirical evidence, both qualitative and quantitative. Taking a subnational approach, she zooms in on local situations and demonstrates how mineral resources affect local governance and economic as well as human development.

The uranium minerals that today are at the centre of worldwide attention were unknown until 1780, when Wagsfort found a pitchblende sample in 10hanngeorgenstadt. This discovery passed unnoticed, however, since Wags fort thought that it contained a black species of a zinc mineral-hence the n':lme 'pitchblende' (= pitch-like blende). Seven years later, Klaproth, while examining the mineral, noted that it contained an oxide of an unknown metal, which he called 'uranium' in honour of the planet Uranus, recently discovered by Herschel. Klaproth also believed that he had separated the metal, but, in fact, the attempt failed, and uranium, given its strong affinity with oxygen, was not separated until several years later. In 1833 Arfwedson attempted the separation and, in so doing, reduced the pitchblende. His attempt was not successful and only U02 was obtained. It was Peligot, in 1840, who was finally successful. He managed the reduction of the metal working with metallic potassium. It should be remembered that twelve years earlier Berzelius had isolated thorium.

In 1983 the Nuclear Energy Agency of the Organisation for Economic Cooperation and Development (OECD/NEA) and the IAEA jointly published a book on Uranium Extraction Technology. A primary objective of this report was to document the significant technological developments that took place during the 1970s. The purpose of this present publication is to update and expand the original book.