Citation:

dsdp.proc.72.124.1983

Name: (Table 1) Physical properties at DSDP Hole 72-516F
Published: 1983
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

Forty indurated sediment samples from Site 516 were studied to determine the cause of acoustic anisotropy in carbonate- bearing deep-sea sediments. Recovered from sub-bottom depths between 388 and 1222 m, the samples have properties exhibiting the following ranges: wet-bulk density, 1.90-2.49 g/cm3; fractional porosity, 0.45-0.14; carbonate content, 33-88%; compressional-wave velocity (at 0.1 kbar pressure), 1.87-4.87 km/s; and anisotropy, 1-13%. Velocities were measured in three mutually perpendicular directions through the same specimen in 29 of the 40 samples studied. Calcite fabric has been estimated by X-ray pole figure goniometry. The major findings of this study are:

1) Carbonate-bearing deep-sea sediments may be regarded as transversely isotropic media with symmetry axes normal to bedding.

2) Calcite c-axes are weakly concentrated in a direction perpendicular to bedding, but the preferred orientation of calcite does not contribute significantly to velocity anisotropy.

3) The properties of bedded and unbedded samples are distinctly different. Unbedded sediments exhibit low degrees of acoustic anisotropy (1-5%). By contrast, bedded samples show higher degrees of anisotropy (to 13%), and anisotropy increases markedly with depth of burial. Thus, bedding must be regarded as the principal cause of acoustic anisotropy in calcareous, deep-sea sediments.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: -30.276500 * Longitude: -35.285000

Date/Time Start: 1980-03-11T00:00:00 * Date/Time End: 1980-03-11T00:00:00

Minimum DEPTH, sediment/rock: 388 m * Maximum DEPTH, sediment/rock: 1222 m

Event(s):

72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Carlson, Richard L	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m			Geocode – mbsf
3	Density, wet bulk	WBD	g/cm³	Carlson, Richard L	Age model, biofluktuation	±1%
4	Porosity, fractional	Poros frac		Carlson, Richard L
5	Porosity, standard deviation	Poros std dev	±	Carlson, Richard L		Fractional
6	Porosity, fractional	Poros frac		Carlson, Richard L	Calculated from regressions
7	Porosity, standard deviation	Poros std dev	±	Carlson, Richard L	Calculated from regressions
8	Velocity, compressional wave	Vp	m/s	Carlson, Richard L		#1, horizontal, at 0.1 kbar, ±1%
9	Velocity, compressional wave	Vp	m/s	Carlson, Richard L		#2, horizontal, at 0.1 kbar, ±1%
10	Velocity, compressional wave	Vp	m/s	Carlson, Richard L		Vertical, at 0.1 kbar, ±1%
11	Difference	Diff		Carlson, Richard L		Difference of velocities
12	Standard deviation	Std dev	±	Carlson, Richard L		Difference of velocities
13	Velocity, compressional wave anisotropy	Vp anisotropy	%	Carlson, Richard L		±1.2%
14	Carbonates	Carb	%	Carlson, Richard L		±2
15	Bedding/banding	Bedding/banding		Carlson, Richard L

License:

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

Size:

467 data points

Data

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

1 Sample label (DSDP/ODP/IODP sample designation)	2 Depth sed [m] (mbsf)	3 WBD [g/cm³] (±1%, Age model, biofluktuation)	4 Poros frac	5 Poros std dev [±] (Fractional)	6 Poros frac (Calculated from regressions)	7 Poros std dev [±] (Calculated from regressions)	8 Vp [m/s] (#1, horizontal, at 0.1 kbar, ±1%)	9 Vp [m/s] (#2, horizontal, at 0.1 kbar, ±1%)	10 Vp [m/s] (Vertical, at 0.1 kbar, ±1%)	11 Diff (Difference of velocities)	12 Std dev [±] (Difference of velocities)	13 Vp anisotropy [%] (±1.2%)	14 Carb [%] (±2)	15 Bedding/banding
72-516F-24-1,17-26	388	1.90	0.45	0.01			1960		1910	50	20	2.6	79	Unbedded sample
72-516F-25-3,44-53	401	2.01			0.41	0.02	1960	1960	1920				68	Bedded sample
72-516F-26-1,17-25	407	1.99	0.43	0.03			1910			40	20	2.1	65	Bedded sample
72-516F-29-1,41-51	436	1.96	0.46	0.01			1940		1870	70	20	3.7	81	Bedded sample
72-516F-32-1,15-25	464	1.99			0.42	0.02	2070	2070	2000	70	20	3.4	74	Bedded sample
72-516F-34-1,25-35	483	1.94	0.44	0.01			2000		1960	40	20	2.0	75	Bedded sample
72-516F-41-1,85-93	550	2.00			0.42	0.02	2180	2070	2080	50	30	2.1	89	Bedded sample
72-516F-50-1,100-110	636	2.06	0.36	0.02			2540	2580	2470	90	30	3.6	84	Unbedded sample
72-516F-52-3,5-14	658	2.04			0.39	0.02	2330	2310	2270	50	30	2.2	74	Unbedded sample
72-516F-55-2,43-53	684	2.08	0.33	0.02			2870		2800	70	30	2.5	70	Unbedded sample
72-516F-58-1,78-88	711	2.22			0.29	0.02	2500	2480	2370	120	30	4.9	76	Bedded sample
72-516F-60-4,112-122	726	2.21	0.29	0.01			2520		2400	120	30	4.8	74	Bedded sample
72-516F-62-2,48-56	740	2.25			0.27	0.02	2650	2640	2540	110	30	4.0	72	Bedded sample
72-516F-70-1,22-32	796	2.30			0.24	0.02	2930	2950	2740	200	30	7.0	65	Bedded sample
72-516F-75-4,110-120	838	2.42	0.17	0.01			3550		3250	260	40	7.6	72	Bedded sample
72-516F-78-4,1-11	864	2.25	0.28	0.01			2460	0	2430	30	30	1.2	64	Unbedded sample
72-516F-79-2,93-103	871	2.33	0.24	0.01			2960	2960	2750	210	30	7.3	65	Bedded sample
72-516F-80-2,32-39	879	2.25	0.23	0.01			3660	3600	3540	90	40	2.5	77	Unbedded sample
72-516F-83-2,70-80	903	2.22			0.29	0.02	3110	3090	3080	20	40	0.6	88	Unbedded sample
72-516F-84-6,20-30	918	2.20	0.29	0.02			3050	3050	2970	80	40	2.6	82	Unbedded sample
72-516F-85-1,20-30	920	2.12			0.35	0.02	2660	2700	2620	60	30	2.3	87	Unbedded sample
72-516F-86-2,44-54	931	2.23	0.28	0.03			3000	3000	2900	100	40	3.4	83	Unbedded sample
72-516F-87-5,112-121	946	2.27			0.26	0.02	3030	3070	3000	50	40	1.6	85	Unbedded sample
72-516F-90-3,123-132	971	2.15			0.33	0.02	2720	2740	2680	50	30	1.8	81	Unbedded sample
72-516F-91-5,78-87	983	2.27	0.25	0.02			3160		3100	60	40	1.9	82	Unbedded sample
72-516F-93-4,126-135	1001	2.29			0.25	0.02	2470	2470	2270	200	30	8.3	45	Bedded sample
72-516F-100-3,44-53	1048	2.31	0.27	0.01			2430		2310	120	30	5.0	48	Unbedded sample
72-516F-101-2,95-105	1053	2.32			0.23	0.02	3020	2990	2740	270	30	9.1	65	Bedded sample
72-516F-102-2,121-131	1058	2.30	0.23	0.02			2630	0	2360	270	30	10.6	52	Bedded sample
72-516F-103-3,30-39	1063	2.29	0.24	0.01			2980	3030	2750	260	30	8.7	65	Bedded sample
72-516F-105-5,0-10	1084	2.31	0.24	0.01			3050	0	2790	260	40	8.8	57	Bedded sample
72-516F-106-3,20-30	1090	2.26	0.27	0.01			3090	3060	2870	210	40	6.8	68	Bedded sample
72-516F-107-4,125-134	1101	2.33			0.22	0.02	3000	3010	2750	260	30	8.7	55	Bedded sample
72-516F-108-3,114-124	1109	2.33	0.23	0.01			3070	3110	2820	270	40	9.0	59	Bedded sample
72-516F-109-3,107-116	1113	2.32	0.23	0.01			3110	3110	2750	360	40	12.0	63	Bedded sample
72-516F-113-5,78-87	1152	2.38			0.19	0.02	3630	3670	3280	360	40	10.5	65	Bedded sample
72-516F-116-2,110-120	1175	2.40	0.20	0.01			3340	3410	2950	430	40	13.1	34	Bedded sample
72-516F-117-4,116-125	1187	2.49	0.14	0.01			4010	4010	3690	320	50	8.2	75	Bedded sample
72-516F-119-3,62-71	1198	2.43			0.16	0.02	4180	4190	3950	240	50	5.7	78	Bedded sample
72-516F-122-1,77-86	1222	2.48			0.14	0.02	4870	4830	4500	350	60	7.4	51	Bedded sample