Publication Date:
2023-08-28
Description:
Dredging in the Danger Island Troughs, which divide the High and Western parts of the Manihiki Plateau, recovered several fresh pebbles of olivine tholeiite and tholeiite, a single pebble of highly altered gabbroic cumulate, and several dozen pebbles of altered variolitic basalt. Troughs suggests that at one time the troughs were the site of active faulting. A tectonic model for the evolution of the plateau, consistent with a fracture zone origin for the Danger Island Troughs, requires the formation of the Manihiki Plateau at a triple junction of the Pacific, Farallon, and Antarctic plates.
Keywords:
Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; DSDP; File name; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sediment type; Size; SOTW11WT-068D; SOTW-68D; SOUTHTOW; Substrate type; Thomas Washington; Uniform resource locator/link to image; Visual description
Type:
Dataset
Format:
text/tab-separated-values, 11 data points