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Настоящее учебное пособие предназначено для студентов, обучающихся по специальности «Геологическая съёмка, поиски и разведка месторождений полезных ископаемых». В основу пособия положены фундаментальные работы отечественных и зарубежных специалистов, авторы пособия стремились изложить материал в предельно доступной форме для понимания и усвоения сложнейших вопросов генезиса, условий преобразования, металлогении магматических и метаморфических горных пород. Данное пособие предназначено, также, для аспирантов и геологов широкого профиля, занимающихся детальным изучением магматических и метаморфических горных пород.
European pottery studies frequently include petrological analysis as an assumed, routine part of any serious ceramic study. However, despite the legacy of Anna Shepard's formative work in Mesoamerican ceramic studies technological analyses are virtually absent from recent reports.
Micas are among the most common minerals in the Earth crust: 4.5% by volume. They are widespread in most if not all metamorphic rocks (abundance: 11%), and common also in sediment and sedimentary and igneous rocks. Characteristically, micas form in the uppermost greenschist facies and remain stable to the lower crust, including anatectic rocks (the only exception: granulite facies racks). Moreover, some micas are stable in sediments and diagenetic rocks and crystallize in many types of lavas. In contrast, they are also present in association with minerals originating from the very deepest parts of the mantle—they are the most common minerals accompanying diamond in kimberlites.
This book is intended for the use of advanced students, research workers, and teachers in the field of petrology. Its aim is to present a unified general impression of the origin and evolution of rocks that are generally believed to have crystallized, or to have been profoundly modified, at high temperatures and at pressures such as prevail from the earth's surface to a depth of perhaps 20 km.
Ignez de Pinho Guimarães and Jefferson Valdemiro de Lima Editorial for Special Issue “Mineral Chemistry of Granitoids: Constraints on Crystallization Conditions and Petrological Evolution”
Jefferson Valdemiro de Lima, Ignez de Pinho Guimarães, José Victor Antunes de Amorim, Caio Cezar Garnier Brainer, Lucilene dos Santos and Adejardo Francisco da Silva Filho A Review of the Mineral Chemistry and Crystallization Conditions of Ediacaran–Cambrian A-Type Granites in the Central Subprovince of the Borborema Province, Northeastern Brazil
A remarkable prehistoric site has recently been excavated tn Yorkshire, known as Paddock Hill, Thwtng or simply Thwtng (National Grid Reference TA 030706). It consists of a later neoltthtc-earlter Bronze Age henge monument that was converted into a hillfort tn the later Bronze Age ( 1200 be). The longevity of occupation, over a millennium, gtves rise to a continuous sequence of ceramics from Grooved Ware and Beaker pottery to post DeverelRimbury ceramics. In southern England there ts a twenty-five year tradition of analysing ceramics from archaeological excavations, out Yorkshire ts not so fortunate. The complexities of glacial drift have, to a large extent, precluded the use of thin section petrology, and this project was conceived as an attempt to investigate the feasibility of ustng petrological anafysis to provenance prehistoric pottery in a complex geological area. <...>
We are all familiar with the subdivision of the natural world into the plant, animal, and mineral kingdoms. Of these the realm of minerals is the study and research area of mineralogy. A mineralogist uses the word mineral, however, in a much more restricted sense than prevails with common usage. If we examine a rock rather closely, we notice, for example, that a sandstone is composed of individual quartz grains.
This book is concerned with the study of ores as rocks—that is, with ore petrology. For much of the last three hundred years—and certainly for much of the twentieth century—most students of ore genesis have regarded the majority of metalliferous deposits as exotic entities, derived from extraneous sources and superimposed on geological situations to which they bore little or no genetic relationship. Almost the only exceptions have been those, such as ores of chromium and nickel, that have apparently formed as part of the igneous rocks that enclose them.
В пособии сформулированы представления о магмах и причинах разнообразия магматических пород; приведена современная классификация плутонических и вулканических образований; систематизированы сведения о типах метаморфизма и метаморфических пород.
Petrology is a required subject of study in a majority of geology programs in the United States and is an integral part of geology curricula in Canada and elsewhere in the world. The subject merits this important position because rocks make up much of the Earth. Furthermore, many subdisciplines in geology incorporate petrologic knowledge. Thus, petrology provides the foundation for the study of the Earth and its history.