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Index to Marine and Lacustrine Geological Samples (IMLGS)

Repository: University of Hawaii at Manoa
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Ship: Moana Wave
Cruise: MW8701
Sample: MW8701 STA10 RD10
Device: dredge, rock
Latitude: -15.85083
Longitude: 173.40117
Water Depth(m): 3630
Date: 19860126
Storage: room temperature, dry
Province: basin, small ocean

S Pacific Ocean, N Fiji Basin. Chain bag dredge. Field description: basalt
1 :   
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Comments: Total dredge haul consisted of 4-500 lbs of basalt; some quite fresh and glass; some with up to 2 mm; Mn. minor palagonite and Fe oxide; many samples are ol phyric; also mud from pipe dredge. Sample 1,4 - pillow or flow frag; cooling fracture textures; medium grained; 0-7 mm glass; <1 mm alteration (Mn + Fe palag); ves .3-3 mm 1-2%; ol <1 mm; pc sparse <.5 mm. Sample 2,9,13 - irregular pillow frags; 0-8 mm pc phyric glass; rock pc & ol phyric; 0-2 mm alteration; medium grained; vesicles .5-1 mm, 0-2%; 5-10 mm chill (very fine) zone beneath glass. Sample 3,12 - pillow frag; medium grained; 0-6 mm glass; up to 1.5 mm ol phyric; <<1 mm alteration; vesicles .5-2 mm, 1%; coarse texture to weathered sfcs. Sample 5 - sheet flow frag; fine to medium grained; 0-11 mm glass withpc; <1 mm alteration; up to 2 mm ol & pc phyric; vesicles .2 mm, 1-3% + pipes; 10-13 mm chill zone. Sample 6 - pillow frag; fine to med grained; 0-4 mm glass, pc phyric; <1 mm alteration, none on glass; ?ol; pc up to .5 mm; vesicles 1-2 mm, <1%. Sample 7,8,10 - pillow frag; medium gained, 0-8 mm pc phyric glass; 0-2 mm alteration; ol <1 mm; pc <1.5 mm; vesicles 1-1.5 mm, <1%. Sample 11 - pillow frag, fine to med grained; aphyric 0-10 mm glass; <.5 mm alteration; sparsely phyric ol, pc <.7 mm; vesicles irregular .5-15 mm. Sample 14 - flow fragment; fine to med grained; 0-12 mm glass; abundantly ol phyric 2 mm; pc?; vesicles concen in layers; intra flow flowage 2-6 mm; 7 mm chill zone; <<.5 mm alteration. Sample 15 - pillow frag; 0-4 mm glass (aphyric); fine to med grained; minor ol + pc <.5 mm; vesicles abundant up to 1.5 mm, 3-5%; palagonite; 0-2 mm Mn + minor Fe oxide; rough exterior Mn texture.

When you refer to individual samples/data in the IMLGS, please cite each source repository whose data you use.

More Information and how to cite the IMLGS: doi:10.7289/V5H41PB8.

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