The initial concept of a photographic atlas on fault rocks was developed  during informal discussions at the Geological Society of America Penrose  Conference "Significance and Petrogenesis of Mylonitic Rocks" held at San  Diego, California, in spring 1981, and coconvened by the editors of this  book. Many participants felt that a new consensus about mylonites and ductile shear zones had been achieved at the conference, based largely upon the  contributions of geoscientists who brought perspectives from the laboratory  as well as from the field. In part motivated by the publication (1982) of the  Atlas of Deformational and Metamorphic Rock Fabrics (and its predecessor,  the Atlas of Rock Cleavage) both edited by G. J. Borradaile, Μ. B. Bayly, and  C. McA. Powell, we felt that a collection of photographs of features characteristic of faults and shear zones, ranging in scale from mesoscopic to microscopic to even submicroscopic, together with carefully documented locations  and regional (or experimental) information, would provide a valuable reference as well as a teaching device <...>

Within Peru, Fe oxide-Cu-Au deposits are found mainly in the Western Andes range and on the coast, associated with the Jurassic-Cretaceous alkaline to calc-alkaline volcanism of the aborted ensialic Canete-Huarmey Marginal Basin. They also exist in the calc-alkaline plutons of the Coastal Batholith and theTholeiite Patap Super-unit, associated with continental margin processes. The exception is Cobriza (100 million tonnes' @ 1.5% Cu, Fe oxide-Cu-Au type; Cu calcic distal skarn) existing in the eastern range associated with Permian Tardihercynian distensive tectonics and alkaline granites.

Показатели продуктивности порфировых месторождений Cu-Au+Pd±Pt: данные из Скуриса, полуостров Халкидики, Греция, и сравнение с мировыми минерализациями

: The research interest for many authors has been focused on the origin, recovery, and exploration of critical metals, including platinum-group elements (PGEs), with the aim of finding new potential sources. Many giant porphyry Cu deposits are well known around the Pacific Rim, in the Balkan–Carpathian system, Himalayas, China, and Malaysia. However, only certain porphyry Cu-Au deposits are characterized by the presence of significant Pd and Pt contents (up to 20 ppm).

High-gradel gneisses make up a significant part of the continental crust exposed in orogenic belts and in Precambrian cratons. A lot of research has been focussed on high-grade gneiss terrains because they contain a large proportion of the Earth's mineral wealth. Some of these terrains are considered to represent exhumed segments of the lower continental crust and, as such, give valuable  insight into processes of crustal genesis.