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Osmium-isotope and platinum-group-element systematics of impact-melt rocks, chesapeake bay impact structure, virginia, usa
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Walker, Richard J. Lee, Seung Ryeol WrightJr.,Horton, J. |
| Copyright Year | 2005 |
| Description | Osmium (Os) isotopes and platinum-group elements (PGEs) are useful for geochemically identifying a meteoritic component within impact structures, because meteorites are typically characterized by low (187)Os/(188)Os ratios and high PGE concentrations. In contrast, most types of crustal target rocks have high radiogenic Os and very low PGE concentrations. We have examined Os isotope and PGE systematics of impact-melt rocks and pre-impact target rocks from a 2004 test hole in the late Eocene Chesapeake Bay impact structure and from nearby coreholes. Our goal is to determine the proportion of the projectile component in the melt rock Additional information is included in the original extended abstract. |
| File Size | 51043 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050170981 |
| Archival Resource Key | ark:/13960/t9g49nw8s |
| Language | English |
| Publisher Date | 2005-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Impact Melts Geochemistry Osmium Isotopes Rhenium Chesapeake Bay Us Meteoritic Composition Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
