Chemical dynamics of enriched mantle in the Southwestern United States; thorium isotope evidence.
Reid, Mary R; Ramos, Frank C (1996) Chemical dynamics of enriched mantle in the Southwestern United States; thorium isotope evidence. Earth and Planetary Science Letters. 138; 1-4, Pages 67-81. 1996.
| Authors | Reid, Mary R; Ramos, Frank C |
|---|---|
| Year | 1996 |
| Title | Chemical dynamics of enriched mantle in the Southwestern United States; thorium isotope evidence. |
| Source | Earth and Planetary Science Letters. 138; 1-4, Pages 67-81. 1996. |
| Publisher | Elsevier. Amsterdam, Netherlands. 1996. |
| Document type | Serial |
| ISSN | 0012-821X |
| GeoRef | 1996-029754 |
| Keywords | actinides-; basalts-; Basin-and-Range-Province; California-; continental-crust; crust-; discriminant-analysis; enrichment-; geochemical-indicators; geochemistry-; Great-Basin; igneous-rocks; Inyo-County-California; isotope-ratios; isotopes-; Lathrop-Wells; lava-; magmas-; mantle-; Markagunt-Plateau; metals-; neodymium-; Nevada-; North-America; Nye-County-Nevada; radioactive-isotopes; rare-earths; southeastern-California; southern-Nevada; Southwestern-U.S.; southwestern-Utah; statistical-analysis; Th-232-Th-230; thorium-; United-States; Utah-; volcanic-rocks; Washington-County-Utah |
| DOI | 10.1016/0012-821X(95)00234-4 |
Abstract
As probes of mantle below continents, geographically dependent isotope signatures in basalts suggest preservation of old and chemically enriched lithospheric domains. In this paper, we show that Th isotope compositions of basalts from the southwestern U