Loading...
Please wait, while we are loading the content...
Similar Documents
The kolar schist belt: a possible archaean suture zone
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ragamani, V. Hanson, G. N. Balakrishnan, S. Krogstad, E. J. |
| Copyright Year | 1986 |
| Description | The Kolar Schist Belt represents a N-S trending discontinuity in the structures, lithologies, and emplacement and metamorphic ages of late Archean gneisses. The suggestion of a much older basement on the west side of the belt is not seen on the east. Within the schist belt amphibolites from each side have distinctly different chemical characteristics, suggesting different sources at similar mantle depths. These amphibolites were probably not part of a single volcanic sequence, but may have formed about the same time in two completely different settings. Could the amphibolites with depleted light REE patterns represent Archean ocean floor volcanics which are derived from a mantle source with a long term depletion of the light REE? Why are the amphibolites giving an age which may be older than the exposed gneisses immediately on either side of the belt? These results suggest that it is necessary to seriously consider whether the Kolar Schist Belt may be a suture between two late Archean continental terranes. |
| File Size | 230577 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860013637 |
| Archival Resource Key | ark:/13960/t1sf7nm65 |
| Language | English |
| Publisher Date | 1986-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Geochronology Amphiboles Structural Properties Geology Schist Earth Crust Cratons Earth Mantle Lithology Lithosphere Plates Tectonics Gneiss India Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
