'Alkaline rocks' presentation slideshows

Chapter 19: Continental Alkaline Magmatism

Chapter 19: Continental Alkaline Magmatism. Alkaline rocks occur in all tectonic environments, including the ocean basins Conversely, Chapters 12, 15, 17, and 18 have shown us that magmatism on the continents can be highly varied, including tholeiitic and calc-alkaline varieties

621 views • 32 slides

Chapter 19: Continental Alkaline Magmatism

Chapter 19: Continental Alkaline Magmatism. Ol Doinyo Lengai volcano. Alkaline rocks generally have more alkalis than can be accommodated by feldspars alone. The excess alkalis appear in feldspathoids , sodic pyroxenes and amphiboles, or other alkali-rich phases

625 views • 29 slides

Chapter 8: Major Elements

428 views • 28 slides

Chapter 8: Major Elements

452 views • 28 slides

Chapter 8: Major Elements

293 views • 28 slides

Geol 2312 Igneous and Metamorphic Petrology

Geol 2312 Igneous and Metamorphic Petrology. Lecture 18 Continental Alkaline Magmatism. March 9, 2009. Alkaline Igneous Rocks.

466 views • 18 slides

Major elements data

Major elements data. Differenciation Magmatic series. 22. 10. Al. O. MgO. 2. 3. 17. 5. 0. 12. 15. 10. FeO*. 10. CaO. 5. 5. 0. 0. 4. 6. 3. Na. O. 2. K. O. 4. 2. 2. 2. 1. 0. 0. 45. 50. 55. 60. 65. 70. 75. 45. 50. 55. 60. 65. 70. 75. SiO. SiO. 2.

204 views • 10 slides

Rock suites

Rock suites. Rock types that share a common chemical attribute, kindred groups: Silica undersaturated: phonolite, tephrite, basanite, nephelinite, melilitite Metaluminous: rhyolite, dacite, andesite Rock suites occur in specific geographic areas: Calc-alkaline volcanism in island arcs

184 views • 10 slides

Mars Crust: Made of Basalt

Mars Crust: Made of Basalt. Compositions from Mars meteorites, rovers, and orbiters reveal that Mars is dominated by basaltic rock TES data indicate that most of the surface has been weathered. Mars Crust: Made of Basalt.

248 views • 3 slides