Citation:

267816a0

Name: (Table 1) Age determinations of basement rocks of DSDP Leg 31
Published: 1977
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The origin and development of the Phillipine Sea have been central issues in tectonic studies of a marginal sea: the deep-sea drilling project (DSDP), Leg 31, was primarily intended to resolve the question. Unfortunately, at only two of the Leg 31 sites (292 and 296) were microfossils indicating the age of the basement recovered, so the age of the ocean basin, had to be deduced by dating the drilled basement rocks.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: 22.022975 * Median Longitude: 128.451450 * South-bound Latitude: 15.818500 * West-bound Longitude: 124.094200 * North-bound Latitude: 29.340200 * East-bound Longitude: 133.525300

Date/Time Start: 1973-06-26T00:00:00 * Date/Time End: 1973-07-10T00:00:00

Minimum Elevation: -5784.0 m * Maximum Elevation: -2920.0 m

Event(s):

31-292 * Latitude: 15.818500 * Longitude: 124.650800 * Date/Time: 1973-06-26T00:00:00 * Elevation: -2943.0 m * Penetration: 443.5 m * Recovery: 242.8 m * Location: North Pacific/Philippine Sea/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 434 m cored; 9.5 m drilled; 56 % recovery

31-293 * Latitude: 20.354200 * Longitude: 124.094200 * Date/Time: 1973-07-01T00:00:00 * Elevation: -5599.0 m * Penetration: 563.5 m * Recovery: 71.5 m * Location: North Pacific/Philippine Sea/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 171 m cored; 22 m drilled; 41.8 % recovery

31-294 * Latitude: 22.579000 * Longitude: 131.535500 * Date/Time: 1973-07-06T00:00:00 * Elevation: -5784.0 m * Penetration: 118 m * Recovery: 23.2 m * Location: North Pacific/Philippine Sea/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 48.5 m cored; 3 m drilled; 47.8 % recovery

Comment:

AGE (Ka BP) is the total age.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event
2	Sample code/label	Sample label		Ozima, Minoru
3	Rock type	Rock		Ozima, Minoru
4	AGE	Age	ka BP		Geocode
5	Age, dated	Age dated	ka	Ozima, Minoru	plateau age
6	Age, dated standard deviation	Age dated std dev	±	Ozima, Minoru	plateau age
7	Percentage	Perc	%	Ozima, Minoru	Plateau age deined for the fraction of 38Ar released
8	Age, dated	Age dated	ka	Ozima, Minoru	Isochron age
9	Age, dated standard deviation	Age dated std dev	±	Ozima, Minoru	Isochron age
10	-	-		Ozima, Minoru	J value
11	Age model	Age model	ka	Ozima, Minoru	best age for the ocean basin

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

34 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Sample label	3 Rock	4 Age [ka BP]	5 Age dated [ka] (plateau age)	6 Age dated std dev [±] (plateau age)	7 Perc [%] (Plateau age deined for the fr...)	8 Age dated [ka] (Isochron age)	9 Age dated std dev [±] (Isochron age)	10 - (J value)	11 Age model [ka] (best age for the ocean basin)
31-292	31-292-41-2	coarse grained basalt	51100	49400	1500	95	49500	2000	0.006955	49400
31-293	31-293-21-2	gabbro, cummulate rock	44070	42000		73	42000		0.006955	42000
31-294	31-294-7-1	alkali basalt	33900	49100	3500	95	48800	2000	0.006955	49000
31-296	31-296-63-4	lapilli tuff	51800	47900	4000	72	47500	4000	0.010201	47500