Orogenic gold deposits localized in carbonaceous sedimentary (black-shale) complexes are major contributors to worldwide balance of gold extracted from the crust, though there is a limited consensus about the role of host sedimentary rocks, involvement of external (i.e., magma-derived) fluids and brittle deformations into ore remobilization and transport. This paper presents the original results of mineralogical, petrographic and isotopegeochemical

studies of rocks and ores from the large Krasniy gold deposit (Baikal-Patom plateau, southern Siberian craton) given in comparison with the thoroughly studied giant Sukhoi Log deposit, with both deposits hosted by the Neoproterozoic carbonaceous metasedimentary rocks.

Erfreulicherweise hat die 7. Auflage des Mineralogie-Lehrbuches bei Studenten und Hochschullehrern, aber auch bei interessierten Mineraliensammlern eine positive Aufnahme gefunden und war bereits nach zweieinhalb Jahren vergriffen. Auf Wunsch des Verlages wurde die notwendige Neuauflage nicht nur gründlich überarbeitet, sondern wiederum inhaltlich erweitert und durch zahlreiche neue Abbildungen bereichert. Dabei habe ich mich bemüht, konstruktive Kritik von Rezensenten und Anregungen von Kollegen weitgehend zu berücksichtigen. Äußerst hilfreich waren hierfür Übersichtsartikel, die in den letzten Jahren in Sammelbänden und Zeitschriften zu aktuellen Themen erschienen sind. <...>

The purpose of the present text is to provide a concise survey of the history of mineralogy and crystallography through the year 1919. Hopefully, it reflects this rich area of study showing the development of these important scientific endeavors from simple origins through a maturity, which today some might regard as no more than technical art. This is mirrored in the fact that few people now would claim mineralogy as a science balanced on the edge of significant discovery, but that was not the case in the past. Then, mineralogy and its companion study crystallography, were important investigations with each new discovery being widely publicized and debated. Many researchers, some of whom may be counted among the greatest geniuses of the human race, explored, contemplated, and wrote about minerals and crystals. This history tries in some measure to spotlight these people and their discoveries. It is also written as a companion work to Mineralogy and Crystallography: A Biobibliography, which fully describes many of the books relevant to these studies across the same time period <...>

Mineralogical studies of platinum-group minerals (PGM) made during the period 1970-1995 are compiled in this paper for PGM obtained from platinum- and gold-bearing placer deposits of fifteen countries. A total of 3399 quantitative electron microprobe analyses of 37 different PGM are presented, together with analytical data plotted on compositional diagrams. The data reflect the dominance of Pt-Fe alloys (1723 analyses) and Os-Ir-Ru-Pt alloys (976 analyses) in the placers. The platinum-group element (PGE) alloys, as well as some other PGM, generally occur as grains less than one millimetre in size.