Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1976
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.882413 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867171851724128256 |
|---|---|
| author | Byerly, Gary R Melson, William G Vogt, Peter R |
| author_facet | Byerly, Gary R Melson, William G Vogt, Peter R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Volcanic rocks, dredged from depths greater than 1000 m on the Galapagos spreading center, show extreme chemical diversity, including rhyodacites, andesite, ferro-basalts, and low-K oceanic tholeiite. All samples have fresh glassy margins. The ferro-basalts contain up to 18.5% total iron as FeO and up to 3.75% TiO2, while the oceanic tholeiites are as low as 0.02% K2O. The ferro-basalts correlate with the previously proposed zone of high magnetic anomaly amplitudes which flank the Galapagos hot spot, and are consistent with a genesis by shallow fractional crystallization. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_882413 |
| institution | PANGAEA |
| language | en |
| publishDate | 1976 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Annotated record of the detailed examination of ferromanganese crusts from the Galapagos Ridge area Byerly, Gary R Melson, William G Vogt, Peter R Cruise_41; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; DSTGR74-D1; DSTGR74-D7; Event label; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sediment type; Size; Substrate type; USNS De Steiguer (T-AGOR-12); Visual description Volcanic rocks, dredged from depths greater than 1000 m on the Galapagos spreading center, show extreme chemical diversity, including rhyodacites, andesite, ferro-basalts, and low-K oceanic tholeiite. All samples have fresh glassy margins. The ferro-basalts contain up to 18.5% total iron as FeO and up to 3.75% TiO2, while the oceanic tholeiites are as low as 0.02% K2O. The ferro-basalts correlate with the previously proposed zone of high magnetic anomaly amplitudes which flank the Galapagos hot spot, and are consistent with a genesis by shallow fractional crystallization. |
| title | Annotated record of the detailed examination of ferromanganese crusts from the Galapagos Ridge area |
| topic | Cruise_41; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; DSTGR74-D1; DSTGR74-D7; Event label; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sediment type; Size; Substrate type; USNS De Steiguer (T-AGOR-12); Visual description |
| url | https://doi.org/10.1594/PANGAEA.882413 |