Cruise Report (PDF, 4.8Mb) - NOAA, Ocean Explorer

sample
name type Location date hr min vv lat vv long
J415-rock-06 geo
ridge crest
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J415-rock-07 geo ridge crest
J415-rock-08 geo ridge crest
J415-sed-09 geo
J415-multibio-10
bio
J415-multibio-11
bio
ridge crest
next segment
~100m S of
Nautilus vent
targe
Nautilus Mkr-
148
Nautilus Mkr-
148
5/8
2009 09 31 -15.389986 -174.250259 2131 21 1 1652
5/8
2009 10 23 -15.388575 -174.248888 2237 91 3 1623
5/8
2009 12 13 -15.385835 -174.246443 2430 157 2 1647
5/8
2009 13 01 -15.384423 -174.244909 2542 24 1 1631
5/8
2009 13 29 -15.383114 -174.244688 2604 197 2 1617
5/8
2009 13 42 -15.383127 -174.244689 2625 178 2 1617
45
vv
rec hdg alt jasZ J415 sample comments (NELSC) PI
Edge of pushed up burst "bubble". 5-6 cm tabular
piece of fresh lava. ~2cm thick. Grabbed quite a
large piece of the sheet/lobate skylight feature crust.
[~40m S of Temp Anom target] Suspected to be zero
age?
Piece of fresh, shiny lava (lava lobe) from this zeroage
sheet/lobate flow. Crumbly. ~20cm across 15
cm long. The shape of a mushroom or a bakers hat.
The rock broke in half. [~200m NE of Temp Anom
target]
Piece of edge of roof at collapse pit. This is a sample
of the very youngest lava in the area. Sulfur spheres
on top. Part of that zero-age sheet/lobate lava flow
Sediments (incl. black sand) on top of jumbled sheet
flow. This sample filled a large scoop bag. The
largest fragments reach about 3 cm and are mostly
spatter, although a few are more vesicular and could
be considered scoria. The largest fraction is in the 1-
3 mm sizes, with decreasing amounts in the 0.5-1
mm, 0.25-0.5 mm, 0.125-0.25 mm, and 0.063-0.125
size fractions. Almost nothing passed through the 63
micron sieve. The glass is nearly aphyric and is light
brown colored. Nearly the entire sample consists of
pyroclasts and limu o Pelel are common, as are
Pele’s hair, but the vast majority is angular spatter
fragments of varying vesicularity. Lithic fragments are
very rare and no broken crystals were observed.
There are no bacteria strands or foraminifera. Some
seds could be zero age.
Suction of vent biology incl. shrimp, crabs, mussels,
squat lobsters, vent fish, etc. Preliminary specimen
IDs: Thermarces sp, Thermobioties mytilogeiton,
Austinograea williamsi, Austinograea sp, Munidopsis
sp, Alvinocaris sp, Vulcanolepas sp,
Chorocaris/Opaepele sp, polychaetes, gastropods.
Suction sample of vent biology. Repositioning a little
for fresh animals. About 2 feet from previous sample.
Shrimp, crabs, mussels, snails, squat lobsters, etc.
Tmax between rocks=19.2. Preliminary specimen
IDs: Eosipho sp, Thermarces sp, Munidopsis sp,
Austinograea sp, Austinograea williamsi, Alvinocaris
sp, Bathymodiolus sp, Chorocaris/Opaepele sp,
Polychaetes, Gastropods.
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