Citation:

dsdp.proc.92.140.1986

Name: (Table 3) Stratigraphy, sedimentation rates, and mass accumulation rates from DSDP Leg 92 holes
Published: 1986
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1986 (exact date unknown) • DOI registered: 2012-11-14

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Abstract:

The Glomar Challenger crossed the East Pacific Rise at 19°S on Leg 92 during the austral fall of 1983. The intent of the cruise was to recover sediments and rocks that would reveal the geologic history of seafloor hydrothermal activity as determined by the geochemistry and sedimentation history of hydrothermal material, the advection of sediment pore waters, the nature and history of alteration of seafloor basalt, and the paleoceanography of the southeast Pacific.

Results show that the composition of hydrothermal material is determined by its source and modified by exposure to seawater during transport in the water column. The flux of hydrothermal sediment appears to increase during episodes of tectonic activity and ridge jumps but to be independent of spreading rate. Pore water advection in sediment may occur early in the depositional history of a site, but it does not appear to continue for more than 1 or 1.5 m.y.

The basaltic rocks recovered are mostly low-olivine tholeiites, but those recovered at two sites contain ferrobasalt and alkali basalt. Hole 597C is the deepest penetration by the Deep Sea Drilling Project of fast-spreading crust. Basalts from that hole reveal three stages of alteration: an early deuteric stage, a reducing stage, and a later oxidative stage. K/Ar dates of alteration minerals suggest that alteration continues for 9 to 15 m.y. after the formation of crust.

Paleoceanographic studies have defined the Neogene history of the compensation depth and lysocline, the timing of important changes in atmospheric transport processes, and the nature and age of significant intervals of reworking in the abyssal sediments.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: -19.022220 * Median Longitude: -121.607580 * South-bound Latitude: -19.451500 * West-bound Longitude: -129.770500 * North-bound Latitude: -18.806300 * East-bound Longitude: -116.840800

Date/Time Start: 1983-03-02T00:00:00 * Date/Time End: 1983-03-25T00:00:00

Minimum DEPTH, sediment/rock: 0.50 m * Maximum DEPTH, sediment/rock: 41.25 m

Event(s):

92-597 * Latitude: -18.806300 * Longitude: -129.770500 * Date/Time: 1983-03-02T00:00:00 * Elevation: -4166.0 m * Penetration: 54.7 m * Recovery: 41.8 m * Location: South Pacific Ocean * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 45.1 m cored; 9.6 m drilled; 92.7 % recovery

92-598 * Latitude: -19.004700 * Longitude: -124.676800 * Date/Time: 1983-03-17T00:00:00 * Elevation: -3699.0 m * Penetration: 52.4 m * Recovery: 41.2 m * Location: South Pacific Ocean * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 52.4 m cored; 0 m drilled; 78.7 % recovery

92-599 * Latitude: -19.451500 * Longitude: -119.881300 * Date/Time: 1983-03-20T00:00:00 * Elevation: -3654.0 m * Penetration: 46.3 m * Recovery: 34.8 m * Location: South Pacific/PLATEAU * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46.3 m cored; 0 m drilled; 75.1 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Elevation of event	Elevation	m
5	Depth, top/min	Depth top	m	Rea, David K
6	Depth, bottom/max	Depth bot	m	Rea, David K
7	DEPTH, sediment/rock	Depth sed	m			Geocode – mbsf
8	Sample code/label	Sample label		Rea, David K	DSDP/ODP/IODP sample designation
9	Sample code/label 2	Sample label 2		Rea, David K	DSDP/ODP/IODP sample designation
10	Sediment thickness	Sed thick	m	Rea, David K
11	Nannofossil zone	Nannos zone		Rea, David K
12	Porosity	Poros	% vol	Rea, David K
13	Density, dry bulk	DBD	g/cm³	Rea, David K
14	Age, minimum/young	Age min	ka	Rea, David K		Leg 92 zonations
15	Age, maximum/old	Age max	ka	Rea, David K		Leg 92 zonations
16	AGE	Age	ka BP			Geocode
17	Duration	Duration	ka	Rea, David K		Leg 92 zonations
18	Sedimentation rate	SR	cm/ka	Rea, David K		Leg 92 zonations
19	Accumulation rate, mass	MAR	g/cm²/ka	Rea, David K		Leg 92 zonations
20	Age, minimum/young	Age min	ka	Rea, David K		Zonations from Berggren et al. (1985)
21	Age, maximum/old	Age max	ka	Rea, David K		Zonations from Berggren et al. (1985)
22	AGE	Age	ka BP			Geocode
23	Duration	Duration	ka	Rea, David K		Zonations from Berggren et al. (1985)
24	Sedimentation rate	SR	cm/ka	Rea, David K		Zonations from Berggren et al. (1985)
25	Accumulation rate, mass	MAR	g/cm²/ka	Rea, David K		Zonations from Berggren et al. (1985)

License:

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

Size:

452 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Depth top [m]	6 Depth bot [m]	7 Depth sed [m] (mbsf)	8 Sample label	9 Sample label 2	10 Sed thick [m]	11 Nannos zone	12 Poros [% vol]	13 DBD [g/cm³]	14 Age min [ka] (Leg 92 zonations)	15 Age max [ka] (Leg 92 zonations)	16 Age [ka BP]	17 Duration [ka] (Leg 92 zonations)	18 SR [cm/ka] (Leg 92 zonations)	19 MAR [g/cm²/ka] (Leg 92 zonations)	20 Age min [ka] (Zonations from Berggren et al...)	21 Age max [ka] (Zonations from Berggren et al...)	22 Age [ka BP]	23 Duration [ka] (Zonations from Berggren et al...)	24 SR [cm/ka] (Zonations from Berggren et al...)	25 MAR [g/cm²/ka] (Zonations from Berggren et al...)
92-597	-18.8063	-129.7705	-4166	0.0	1.5	0.75	92-597-1-1,150	92-597-1-1,150	1.5	<CN3/4	80.7	0.511	0	14200	7100	14200	0.011	0.005	0	14200	7100	14200	0.011	0.005
92-597	-18.8063	-129.7705	-4166	1.5	4.1	2.80	92-597-1-2,0	92-597-1-3,110	2.6	CN3 + 4	70.8	0.774	14200	17000	15700	2800	0.093	0.072	14200	17200	15700	3000	0.087	0.067
92-597	-18.8063	-129.7705	-4166	4.1	15.5	9.80	92-597-1-3,110	92-597-3-1,130	11.4	CN2	61.3	1.026	17000	18700	18100	1700	0.671	0.688	17200	19000	18100	1800	0.633	0.650
92-597	-18.8063	-129.7705	-4166	15.5	19.2	17.35	92-597-3-1,130	92-597-3-4,50	3.7	CNIc	58.0	1.113	18700	22000	20600	3300	0.112	0.125	19000	22200	20600	3200	0.116	0.129
92-597	-18.8063	-129.7705	-4166	19.2	27.8	23.50	92-597-3-4,50	92-597-4-3,100	8.6	CNla + b	60.3	1.052	20000	24800	23500	2800	0.307	0.323	22200	24800	23500	2600	0.331	0.348
92-597	-18.8063	-129.7705	-4166	27.8	54.7	41.25	92-597-4-3,100	92-597-CC	26.9	CP19b	63.2	0.975	24800	28300	26700	3500	>0.769	>0.750	24800	28600	26700	3800	>0.708	>0.690
92-598	-19.0047	-124.6768	-3699	0.0	1.0	0.50	92-598-1-1,0	92-598-1-1,100	1.0	<CN13-15	77.4	0.599	0	1880	940	1880	0.053	0.032	0	1880	940	1880	0.053	0.032
92-598	-19.0047	-124.6768	-3699	1.0	4.7	2.85	92-598-1-1,100	92-598-1-4,20	3.7	CN10-12	74.8	0.668	1880	5400	3640	3520	0.105	0.070	1880	5400	3640	3520	0.105	0.070
92-598	-19.0047	-124.6768	-3699	4.7	6.4	5.55	92-598-1-4,20	92-598-2-1,20	1.7	CN9b	66.6	0.885	5400	6700	6050	1300	0.131	0.116	5400	6700	6050	1300	0.131	0.116
92-598	-19.0047	-124.6768	-3699	6.4	9.0	7.70	92-598-2-1,20	92-598-2-2,130	2.6	CN9a	67.8	0.853	6700	8100	7400	1400	0.186	0.159	6700	8100	7400	1400	0.186	0.159
92-598	-19.0047	-124.6768	-3699	9.0	12.4	10.70	92-598-2-2,130	92-598-2-5,20	3.4	CN8a + b	67.9	0.851	8100	9200	8650	1100	0.309	0.263	8100	9200	8650	1100	0.309	0.263
92-598	-19.0047	-124.6768	-3699	12.4	16.0	14.20	92-598-2-5,20	92-598-3-1,20	3.6	CN7a + b	66.6	0.885	9200	10700	10600	1500	0.240	0.212	9200	12000	10600	2800	0.129	0.114
92-598	-19.0047	-124.6768	-3699	16.0	17.0	16.50	92-598-3-1,20	92-598-3-1,120	1.0	CN6	68.5	0.835	10700	12000	12250	1300	0.077	0.064	12000	12500	12250	500	0.200	0.167
92-598	-19.0047	-124.6768	-3699	17.0	29.7	23.35	92-598-3-1,120	92-598-4-3,130	12.7	CN5a + b	72.4	0.731	12000	14200	13350	2200	0.577	0.422	12500	14200	13350	1700	0.747	0.546
92-598	-19.0047	-124.6768	-3699	29.7	52.4	41.05	92-598-4-3,130	92-598-CC	22.7	CN3-4	74.8	0.668	14200	17000	15700	2800	0.811	>0.542	14200	17200	15700	3000	>0.757	>0.505
92-599	-19.4515	-119.8813	-3654	0.0	1.0	0.50	92-599-1-1,0	92-599-1-1,100	1.0	CN13-15	63.3	0.973	0	2880	1440	1880	0.053	0.052			1440
92-599	-19.4515	-119.8813	-3654	1.0	2.8	1.90	92-599-1-1,0	92-599-1-1,130	1.8	CN11-12	64.0	0.954	1880	3700	2790	1820	0.099	0.094			2790
92-599	-19.4515	-119.8813	-3654	2.8	11.9	7.35	92-599-1-2,130	92-599-2-3,100	9.1	CN10	66.2	0.896	3700	5400	4550	1700	0.535	0.479			4550
92-599	-19.4515	-119.8813	-3654	11.9	30.8	21.35	92-599-2-3,100	92-599-4-3,70	18.9	CN9b	70.8	0.774	5400	6700	6050	1300	1.454	1.125			6050
92-599	-19.4515	-119.8813	-3654	30.8	34.8	32.80	92-599-4-3,70	92-599-4-6,20	4.0	CN9a	70.7	0.776	6700	8100	7400	1400	0.286	0.222			7400
92-599	-19.4515	-119.8813	-3654	34.8	40.8	37.80	92-599-4-6,20	92-599-CC	6.0	CN8b	70.7	0.776	8100	8600	8350	500	>1.200	>0.931			8350
92-600C	-18.9283	-116.8408	-3398	0.0	4.4	2.20	92-600C-1-1,0	92-600C-1-3,140	4.4	CN13-15	68.2	0.843	0	1880	940	1880	0.252	0.212			940
92-600C	-18.9283	-116.8408	-3398	4.4	4.8	4.60	92-600C-1-3,140	92-600C-1-4,30	0.4	CN12	66.8	0.880	1880	3500	2690	1620	0.025	0.022			2690
92-600C	-18.9283	-116.8408	-3398	4.8	6.3	5.55	92-600C-1-4,30	92-600C-1-5,30	1.5	CN11	67.9	0.851	3500	3700	3600	200	0.750	0.638			3600
92-600C	-18.9283	-116.8408	-3398	6.3	19.0	12.65	92-600C-1-5,30	92-600C-CC	12.7	CN10c + d	72.6	0.726	3700	4600	4150	900	1.411	>1.024			4150
92-601	-18.9203	-116.8685	-3433	0.0	8.0	4.00	92-601-1-1,0	92-601-1-6,36	8.0	CN13-15	66.3	0.893	0	1880	940	1880	0.426	0.380			940
92-601	-18.9203	-116.8685	-3433	8.0	8.9	8.45	92-601-1-6,36	92-601-1-6,126	0.9	CN12	66.7	0.882	1880	3500	2690	1620	0.056	0.049			2690
92-601	-18.9203	-116.8685	-3433	8.9	10.5	9.70	92-601-1-6,126	92-601-2-1,70	1.6	CN11	68.3	0.840	3500	3700	3600	200	0.800	0.672			3600
92-601	-18.9203	-116.8685	-3433	10.5	20.4	15.45	92-601-2-1,70	92-601-CC	9.9	CN10c + d	71.7	0.750	3700	4600	4150	900	>1.100	>0.825			4150