| 书目名称 | Stable Mineral Assemblages of Igneous Rocks |
| 副标题 | A Method of Calculat |
| 编辑 | Alfred Rittmann |
| 视频video | |
| 丛书名称 | Minerals, Rocks and Mountains |
| 图书封面 |  |
| 描述 | This book represents the results of a lengthy study which Professor ALFRED RITTMANN began some thirty years ago. The relationship between the chemical and mineralogical composition of igneous rocks is established as far as is possible. Petrographers will appreciate that this problem is extremely complex, particularly since this relationship forms the basis of the classification and nomenclature of igneous rocks. The ingenious scheme of calculation of the CI.P.W. norm system is essentially chemical in nature. The compositions of the stoichiometrically ideal "normative minerals" do not correspond to those of the constituent minerals found in rocks. Although the "norm" is not intended to equal the "mode" or actual mineral composition of a rock, at least a qualitative agreement between the norm and the mode is desirable. For a number of rocks and rock groups, especially the leucocratic and silicic rocks, the deviation of the norm from the mode is generally within tolerable limits. For the melanocratic and highly subsilicic rocks, on the other hand, the CI.P. W. scheme of calculation too often yields results which fail to reflect the observed mineral composition. The anomalies produced |
| 出版日期 | Book 1973 |
| 关键词 | Gestein; Vulkangestein; classification; evolution; igneous rock; mineral; petrography; volcanic rock |
| 版次 | 1 |
| doi | https://doi.org/10.1007/978-3-642-65482-4 |
| isbn_softcover | 978-3-642-65484-8 |
| isbn_ebook | 978-3-642-65482-4Series ISSN 0343-2181 |
| issn_series | 0343-2181 |
| copyright | Springer-Verlag Berlin · Heidelberg 1973 |
发表于 2025-3-21 20:06:31
