One of the nine known planets that revolve around the Sun, the Earth is thought to be about 4.6 billion years old. Geology is the study of the history of the Earth. Because rocks can provide valuable information about the Earth in previous times, geologists study them and work out the processes and events that produced them. As we can currently bore only a few miles into the crust, or outer shell, we cannot sample rocks from the mantle (the inner shell) directly. The rocks and minerals shown here come from many locations and introduce important features that are explained in more detail later in the book.
This guide covers over 320 of the most important rocks and minerals found all over the world. The book begins with a short introduction, which focuses on the process of identifying different rocks and minerals. The following pages divide rocks into three groups: sedimentary, igneous, and metamorphic; and minerals into two groups: ore minerals and rock-forming minerals. Introductions to each of these sections define the groups and explain how entries are organized within them.
Минералы, горные породы и месторождения полезных ископаемых в геологической истории. Общие проблемы эволщии мянералообразования в истории геологического развития Критерии последовательности процессов минерало-образования во времени Особенности процессов формирования горных пород и руд в различные геологические эпохи Значение анализа эволюци минералообразования для геологической практики
The purpose of this book is to illustrate the appearance of many of the common rockforming minerals in thin section under the microscope. It is not our intention that it should be used as a substitute lor a mineralogy text book but rather as a laboratory handbook for use in practical classes together with one ot the standard textbooks on mineralogy <...>
Being able to accurately identify minerals in thin-section is an essential skill for any geologist, and is vital for the correct interpretation of rocks and their petrogenesis. It can be a particularly challenging prospect for students new to the subject. However, with a basic understanding of microscopy, petrology and optical mineralogy, coupled with some reference text books, it is soon possible to identify some of the major rock- forming minerals with confidence.
Petrography of igneous end Metamorphic Rxks is designed for students taking their first course in petrography. It combines, in a single book, a compilation of the optica) properties of the common rock-forming m nerals. descriptions of the textures and structures of igneous and metamorphic rocks, and a treatment of the classification of these rocks. The book deals with the description of rocks, not their origins. The coverage is not exhaustive and is limited to what students are likely to encounter and need to know in an introductory petrography course. The material is organized so as to make it as rapidly accessible as possible, for those who have not previously had a course in optical mineralogy. Chapter 2 briefly introduces this subject.
У енциклопедично-довідковому словнику (Книга перша) наведено описи понад 2000 мінералів, а також основні поняття мінералогії. Словник адресований геологам, гірникам, фахівцям наукових, навчальних та виробничих установ і організацій, студентам і аспірантам, а також всім хто цікавиться мінералогією.
Приведено описание скарново-шеелит-сульфидных месторождений, расположенных в центральной части Сихотэ-Алинской складчатой области. На примере месторождения Восток—2 (Приморье) дана минералого-петрографическая характеристика интрузивных пород, скарнов и руд. Выяснены возрастные взаимоотношения скарнов, даек и оруденения. В распределении минеральных ассоциаций различных стадий на месторождении установлена горизонтальная зональность. На основании изучения минеральных парагенезисов околорудных ме-тасоматитов, сосуществующих пар минералов, температуры декре-питации и гомогенизации и состава растворов методом тройной водной вытяжки реставрированы основные физико-химические параметры рудообразования: температура, давление, кислотность-щелочность, окислительный потенциал, режим щелочей. Приведена сравнительная характеристика скарново-шеелит-сульфидных месторождений СССР, Китая, Кореи
