Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1)
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
1971
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171843227516928 |
|---|---|
| author | Heezen, Bruce C Fischer, A G Boyce, Robert E Bukry, David Douglas, Robert G Garrison, Robert E Kling, S A Krasheninnikov, Valery A Lisitzin, Alexander P Pimm, Anthony C |
| author_facet | Heezen, Bruce C Fischer, A G Boyce, Robert E Bukry, David Douglas, Robert G Garrison, Robert E Kling, S A Krasheninnikov, Valery A Lisitzin, Alexander P Pimm, Anthony C |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | At Sites 47 and 48, impenetrable and cherty Upper Cretaceous chalks were found. The upper part of what infer to be lower Cretaceous is even more reflective, and likely to be very cherty (and was found to be cherty in the Vema core). It became clear that basement could only be reached where the Upper Cretaceous and the upper part of the lower Cretaceous are absent. However, west of Site 48, the R/V Argo record showed an area in which the Upper Cretaceous has wedged out down dip, and the Lower Cretaceous is thinning out by loss of the strongly reflective beds at the top. This area appeared to offer the best chance for sampling the lowermost transparent layer. Two holes were drilled: Hole 49.0 and Hole 49.1 after Hole 49.0 stopped at 18 m. Beds near the base of sedimentary sequence revealed by the seismic profiles are found to be of early Cretaceous (Neocomian) or latest Jurassic (Tithonian) age, and of pelagic facies. The crust under the Shatsky Rise is latest Jurassic or older. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_867518 |
| institution | PANGAEA |
| language | en |
| publishDate | 1971 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1) Heezen, Bruce C Fischer, A G Boyce, Robert E Bukry, David Douglas, Robert G Garrison, Robert E Kling, S A Krasheninnikov, Valery A Lisitzin, Alexander P Pimm, Anthony C 6-49; 6-49A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg6; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific/CONT RISE; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Visual description At Sites 47 and 48, impenetrable and cherty Upper Cretaceous chalks were found. The upper part of what infer to be lower Cretaceous is even more reflective, and likely to be very cherty (and was found to be cherty in the Vema core). It became clear that basement could only be reached where the Upper Cretaceous and the upper part of the lower Cretaceous are absent. However, west of Site 48, the R/V Argo record showed an area in which the Upper Cretaceous has wedged out down dip, and the Lower Cretaceous is thinning out by loss of the strongly reflective beds at the top. This area appeared to offer the best chance for sampling the lowermost transparent layer. Two holes were drilled: Hole 49.0 and Hole 49.1 after Hole 49.0 stopped at 18 m. Beds near the base of sedimentary sequence revealed by the seismic profiles are found to be of early Cretaceous (Neocomian) or latest Jurassic (Tithonian) age, and of pelagic facies. The crust under the Shatsky Rise is latest Jurassic or older. |
| title | Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1) |
| topic | 6-49; 6-49A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg6; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific/CONT RISE; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Visual description |
| url | https://doi.org/10.1594/PANGAEA.867518 |