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Mobilization of the platinum group elements by low-temperature fluids: implications for mineralization and the iridium controversy
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Keays, Reid R. Dowling, Kim Wallace, Malcolm W. Gostin, Victor A. |
| Copyright Year | 1992 |
| Description | Geochemical investigations on the widely dispersed Late Proterozoic Acraman impact ejecta horizon and its host marine shales in the Adelaide Geosyncline provide strong evidence for low-temperature mobilization of the platinum group elements (PGE), including Ir. The ejecta horizon was formed when the middle Proterozoic dacitic volcanics in the Gawler Ranges, central South Australia, were impacted by a very large (ca. 4 km) meteorite. The resulting structure, now represented by Lake Acraman, is Australia's largest meteorite impact structure. Debris from the impact was blasted for many hundreds of kilometers, some falling into the shallow sea of the Adelaide Geosyncline, some 300 km to the east of the impact site. |
| File Size | 3368947 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930000945 |
| Archival Resource Key | ark:/13960/t0vq7vf13 |
| Language | English |
| Publisher Date | 1992-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Precambrian Period Meteorite Collisions Structural Properties Geology Ejecta Platinum Meteorite Craters Shales Volcanology Iridium Australia Low Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
