ALBERT

Note: Enth.: The geology of Danskøya and Amsterdamøya / Audun Hjelle. Geology and structure of the Magdalenefjorden area, Spitsbergen / Yoshihide Ohta. Tectonic development and bulk chemistry of rocks from the Smeerenburgfjorden area, Spitsbergen / Yoshihide Ohta. , THE GEOLOGY OF DANSKØYA AND AMSTERDAMØYA / AUDUN HJELLE. - Abstract. - аннотация. - Introduction. - Geological setting. - Previous work. - Present work. - Geomorphological outline. - The stratigraphic position of the metasediments. - Petrography. - Metasediments. - Pelitic and psammitic rocks. - Marble, skarn mineralization. - Gneiss, migmatitcs, and syntectonic granitic rocks. - Biotite gneiss. - Biotite-amphibole gneiss, amphibolite. - Granite gneiss, migmatite, syntectonic granite. - Post-tectonic dyke rocks. - Granitic dykes. - Mafic dykes. - Structure. - Main events. - The F1 phase. - The F2 phase. - The F3 phase. - Joints. - Metamorphism. - Comparison with other metamorphic areas in Svalbard. - Acknowledgements. - References. - Plates. , GEOLOGY AND STRUCTURE OF THE MAGDALENEFJORDEN AREA, SPITSBERGEN / YOSHIHIDE OHTA. - Abstract. - аннотация. - Introduction. - I. Geological setting. - II. Lithological descriptions. - A. Classification. - B. Description. - 1a. Pelitic biotite schist. - 1b. Felsic biotite gneiss and quartzite. - 2. Layered gneisses. - 3. Amphibolites and marbles. - 4. The plagioclase porphyroblastic gneiss and nebulitic gneiss. - 5. The migmatites. - 6. The grey granite. - 7. Pink aplite and pink nebulitic gneiss. - C. Summary of petrography. - IlI. Distribution of rocks and litho-stratigraphy. - A. Distribution of rocks. - 1. The fine-grained gneisses. - 2. The layered gneisses, amphibolites, and marbles. - 3. The migmatites, plagioclase porphyroblastic gneiss and nebulitic gneiss. - 4. The grey granite. - 5. The pink aplite and pink nebulitic gneiss. - B. Lithostratigraphy. - IV. Geological structure. - A. Description of fold structures. - B. Structural analyses. - C. Summary of geological structure. - Acknowledgements. - References. - Plates. , TECTONIC DEVELOPMENT AND BULK CHEMISTRY OF ROCKS FROM THE SMEERENBURGFJORDEN AREA, SPITSBERGEN / YOSHIHIDE OHTA. - Abstract. - аннотация. - Introduction. - I. Deformation episodes and metamorphism. - A. Deformation episodes. - 1. The F1 deformation, the S1 and S2. - 2. The F2 deformation and S3. - 3. The F3 disturbance and S4. - 4. The F4 episode. - B. Metamorphism. - 1. Quartz. - 2. Feldspars. - 3. Biotite and muscovite. - 4. Cordierite. - 5. Garnet. - 6. Sillimanite. - 7. Spinel and corundum. - 8. Quartzo-feldspathic metatects. - C. Summary and discussion. - II. Modal and chemical compositions. - A. Modal composition of the rocks. - B. Bulk chemical composition of the rocks. - 1. Alkali compositions. - 2. Niggli value-variation diagrams. - 3. Cation ratios. - C. Summary of bulk chemistry. - III. Summary. - 1. Deformation phases. - 2. Metamorphic grade and facies series. - 3. Geochemical characteristics of the rocks. - Acknowledgements. - References. - Plates.