| Title | Early Oligocene Intrusions in the Central Coast Range of Oregon: Petrography, Geochemistry, Geochronology and Implications for the Tertiary Magmatic Evolution of the Cascadia Forearc |
| Publication Type | Thesis |
| Year of Publication | 2006 |
| Authors | Oxford, Jeremiah |
| Academic Department | Dept. of Geology |
| Degree | M. S. |
| Pagination | 237 p. |
| University | Oregon State University |
| City | Corvallis, Or. |
| Type of Work | Masters Thesis |
| Call Number | OSU Libraries: Internet Resources LD4330 2007 .O94, Digital Open Access |
| Keywords | basalt, Cape Foulweather, Cascade Head, geochemistry, geology, paleosciences, stratigraphy, Yachats (Or.), Yachats Basalt, Yaquina Head |
| Notes | An interesting and thorough look at some of the basalt formations on the Oregon Coast. “The OCRI [Oregon Coast Range Intrusions] represent the final episode of widespread forearc magmatism in Cascadia and record significant changes in tectonic interactions between the Farallon and North America plates. The new data acquired in this study have aided the evaluation of existing hypotheses on the tectonic origins of the OCRI suite and have identified new questions in determining their mantle sources. In future work, isotopic data (SR, Nd, Pb) will be necessary to further evaluate the distinctions in mantle sources between the alkaline and gabbroic OCRI.” (p.177) Includes maps, charts, color photographs of thin-sections of rocks. |
| URL | https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/4j03d165r |
