Publication Date:
2016-05-23
Description:
During Leg 111 of the Ocean Drilling
Program, scientists on the
drilling vessel JOIDES Resolution
studied crustal structure and hydrothermal
processes in the eastern
equatorial Pacific. Leg 111 spent 43
days on its primary objective, deepening
and logging Hole 5048, a deep
reference hole in 5.9-million-year-old
crust 200 km south of the spreading
axis of the Costa Rica Rift. Even before
Leg 111 , Hole 5048 was the deepest
hole drilled into the oceanic crust,
penetrating 274.5 m of sediments and
1,075.5 m of pillow lavas and sheeted
dikes to a total depth of 1,350 m
below sea floor (mbsf). Leg 111 deepened
the hole by 212.3 m to a total
depth of 1,562.3 mbsf (1,287.8 m into
basement), and completed a highly successful suite of geophysical logs
and experiments, including sampling
of borehole waters.
Type:
Article
,
PeerReviewed
Format:
text
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