Количественная оценка минеральных ресурсов платины, палладия, золота, никеля и меди в неоткрытых месторождениях PGE в основных и ультраосновных расслоенных  интрузиях в Финляндии

Most of the known platinum group element (PGE) resources in Finland are in contact- and reef-type deposits in 2.45 Ga mafic-ultramafic layered intrusions. These intrusions also have the potential to contain the majority of possibly existing, yet undiscovered, PGE resources in Finland. The undiscovered Pt, Pd, Au, Ni, and Cu resources in contact- and reef-type deposits were estimated down to one kilometre depth using the three-part quantitative assessment method.

In recent years, there has been increasing interest from geoscientists in potassic igneous rocks. Academic geoscientists have been interested in their petrogenesis and their potential value in defining the tectonic setting of the terranes into which they were intruded, and exploration geoscientists have become increasingly interested in the association of these rocks with major epithermal gold and porphyry gold-copper deposits. Despite this current interest, there is no comprehensive textbook that deals with these aspects of potassic igneous rocks. 

Mineral exploration has long been an active pursuit of both individuals and mining companies in Ontario. In recent years there has been a resurgence of interest in prospecting by individuals as a full time occupation, but more especially as “weekend prospectors’’. Accordingly, it was thought appropriate to collect together the reported instances of mineralized fragments dislodged from their bedrock source so that the techniques of tracing such fragments to their source as well as the locations of known fragments would be available to those interested in mineral exploration. 

Since antiquity, gold has been valued for its scarcity, beauty, and resistance to corrosion. Gold is the best known of all native elements and the most likely to be found in a metallic state (Pough 1991). It is the universal standard of value and the common medium of exchange in world commerce (Koschmann and Bergendahl 1968). Gold is almost everywhere considered to be the symbol of everything precious and of enduring value because of the effort required to extract it from nature, and because of its scarcity relative to other metals (Petralia 1996; Merchant 1998). Gold was known and highly valued by the earliest civilizations:

The first edition of this book covered those subjects that I believed were fundamental to acquiring sufficient knowledge about the mining sector to invest in it with confidence. In doing this I dipped into a wide number of subjects and tried to extract the points and issues most relevant to successful investing. Since then the mining and metals sector has experienced a massive bull market and this has led to a number of new or enhanced influences for the sector arising.

Геохимическая разведка золота и ассоциации As-Cu-Pb-Sn-Zn-Li в гранитоидах верхнего протерозоя в районе Вади-Румман на юго-западе Иордании

The geochemical studies were conducted in an area covering about 15 km2 of the south side of the Wadi Rumman area, SW Jordan. The study area included a part of a basement of complex exposed rocks in southwestern Jordan. The complexes comprised igneous and metamorphic suites, mostly from the late Proterozoic age. A systematic geochemical sampling was conducted using rock and heavy mineral-panned concentrate of geochemical samples. Fifty rock samples were collected from the granitic rocks, simple pegmatite dyke, quartz veins and alteration zone, which covered the area.

This paper describes how various characterisation methods can be used to investigate the physicochemical and spectral properties of gold films in contact with glass or ceramic. The interface between the metal and substrate has been given special attention. The examples chosen to illustrate this include: liquid gold films (decorated and fired) or inlayed gold layers on ceramic wares and “sandwich” gold foils between two glass sheets for mosaic application. Characterisation methods include: microanalytical scanning electron microscopy, X-ray diffraction, ion beam analyses (PIXE: particle induced X-ray emission; RBS: Rutherford back-scattering spectrometry), photo-spectrometry and colorimetry. The adhesion mechanism and colour behaviour of the coated objects is discussed. <...>

Epithermal ore deposits form at shallow depth. This conclusion was initially based on geologic reconstructions, ore mineralogy and related textures (Lindgren, 1933). It has subsequently been refined withfluid inclusion data to indicate that epithermal ores form over the temperature range of <150o C to ~300o C, from the surface to as deep as 1 to 2 km. Here we highlight the general characteristics of the two principal styles of epithermal mineralization in which gold is the dominant economic metal. We base our generalizations on observations of many deposits and prospects in the circum-Pacific region. Distinguishing between the two styles is crucial for effective exploration. Although they show similar alteration mineralogies, the distribution of the alteration zones is different, and the economic mineralization is associated with different parts of the system. The alteration zoning can be used as a pointer towards the most prospective part of the system, but only when the style has been correctly recognized. In addition, the two styles of mineralization have differences in their geochemical associations. <...>

Рассмотрена проблема правового регулирования извлечения россыпного золота из техногенно-минеральных образований (отвалов) в Российской Федерации. Актуальность темы обусловлена растущим интересом к переработке отходов горной промышленности и необходимости оптимизации законодательства в данной области. Проанализирована существующая нормативно-правовая база, выявлены пробелы и противоречия в правовом регулировании. Также анализируются позиции профессионального и научного сообщества. Дополнительно внимание уделяется вопросам лицензирования, охраны окружающей среды и правам местных сообществ. Предлагаются рекомендации по совершенствованию правового и управленческого механизма, направленного на устойчивое и эффективное использование техногенно-минеральных ресурсов, что может способствовать не только экономическому развитию, но и улучшению экологической ситуации в регионах, в том числе в золотоносных районах Республики Саха (Якутия).