Citation:

311448a0

Name: (Table 1) Helium concentration in sediments
Published: 1984
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Two decades ago, Merrihue (1964) reported 3He/4He ratios of >10**-4 in ferromagnetic separates from a Pacific deep ocean red clay and concluded that the high ratio is due to extraterrestrial debris amounting to ~1% of the sediment. A decade later Krylov et al. (1973) compiled 3He/4He isotopic data on ocean sediments measured in the Soviet Union and observed that the 3He/4He ratio is generally higher in pelagic sediments where the sedimentation rate is lower. They suggested that the high 3He/4He ratio was attributable to extraterrestrial materials which were concentrated in slowly accumulating ocean floor. However, these important discoveries were almost completely neglected until we re-examined the problem. We have measured 39 sediments from 12 different sites, 10 sites from the western to central Pacific and two sites from the Atlantic Ocean. We find 3He/4He ratios >5 * 10**-5 for six sites, well above the values generally observed in common terrestrial materials. The very high 3He/4He ratio in the sediments is probably due to input of extraterrestrial materials. Input of stratospheric dust of <1 p.p.m., which corresponds to a fallout rate of ~2,000 tons per year, can explain the observation.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: 19.390289 * Median Longitude: -174.414503 * South-bound Latitude: -2.466667 * West-bound Longitude: 148.631667 * North-bound Latitude: 32.983333 * East-bound Longitude: -64.249000

Date/Time Start: 1975-07-24T00:00:00 * Date/Time End: 1975-08-01T00:00:00

Minimum DEPTH, sediment/rock: 0.0450 m * Maximum DEPTH, sediment/rock: 10.5000 m

Event(s):

43-386 * Latitude: 31.186800 * Longitude: -64.249000 * Date/Time: 1975-07-24T00:00:00 * Elevation: -4782.0 m * Penetration: 973.8 m * Recovery: 434.3 m * Location: North Atlantic/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 65 cores; 617.4 m cored; 9.5 m drilled; 70.3 % recovery

43-387 * Latitude: 32.320000 * Longitude: -67.666700 * Date/Time: 1975-08-01T00:00:00 * Elevation: -5117.0 m * Penetration: 794.5 m * Recovery: 177.2 m * Location: North Atlantic/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 468 m cored; 0 m drilled; 37.9 % recovery

KH68-4-15 * Latitude: 11.983333 * Longitude: -169.966667 * Elevation: -5050.0 m * Location: North Pacific Ocean * Method/Device: Piston corer (PC)

Comment:

Errors in 3He and 4He consist of 50% of the hot blank and 1 sigma in the mass spectrometry, the former being much larger than the latter.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	Depth, top/min	Depth top	m	Ozima, Minoru
4	Depth, bottom/max	Depth bot	m	Ozima, Minoru
5	Sample code/label	Sample label		Ozima, Minoru	DSDP/ODP/IODP sample designation
6	Sample mass	Samp m	g	Ozima, Minoru
7	Helium-3	3He	10^-10 cm³/g	Ozima, Minoru
8	Helium-4	4He	10^-9 cm³/g	Ozima, Minoru
9	Helium-3	3He	10^-10 cm³/g	Ozima, Minoru
10	Helium-3, standard deviation	3He std dev	±	Ozima, Minoru
11	Helium-4	4He	10^-9 cm³/g	Ozima, Minoru
12	Helium-4, standard deviation	4He std dev	±	Ozima, Minoru
13	Helium-3/Helium-4	3He/4He	10^-4	Ozima, Minoru		3He/4He ratio is calibrated against air helium 3He/4He ratio to reduce a mass fractionation effect
14	Helium-3/Helium-4, standard deviation	3He/4He std dev	±	Ozima, Minoru

License:

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

Size:

402 data points

Data

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

1 Event	2 Depth sed [m]	3 Depth top [m]	4 Depth bot [m]	5 Sample label	6 Samp m [g]	7 3He [10^-10 cm³/g]	8 4He [10^-9 cm³/g]	9 3He [10^-10 cm³/g]	10 3He std dev [±]	11 4He [10^-9 cm³/g]	12 4He std dev [±]	13 3He/4He [10^-4] (3He/4He ratio is calibrated a...)	14 3He/4He std dev [±]
KH68-4-15	2.2125	2.20	2.225		0.1310	0.00700	42	0.58000	0.16000	1080	200.0	0.5300	0.0500
KH68-4-15	5.2125	5.20	5.225		0.1160	0.00700	62	0.10000	0.04000	820	130.0	0.1200	0.0200
KH68-4-15	7.9125	7.90	7.925		0.1310	0.00500	53	0.08000	0.03000	700	140.0	0.1200	0.0200
KH68-4-18	2.0425	2.03	2.055		0.0990	0.00400	23	0.04000	0.03000	80	20.0	0.4700	0.2100
KH68-4-18	5.0600				0.1330	0.00800	55	0.15000	0.06000	240	40.0	0.6300	0.1500
KH68-4-18	9.7900				0.1060	0.01200	66	0.10000	0.90000	140	30.0	0.7300	0.4900
KH68-4-20	5.2700				0.1170	0.01000	61	0.14000	0.06000	270	40.0	0.5200	0.1400
KH68-4-20	9.9000				0.1060	0.00800	48	0.11000	0.05000	190	30.0	0.5800	0.1700
KH75-3-5-2	0.0450	0.04	0.050		0.1100	0.01000	58	0.04000	0.02000	210	10.0	0.1700	0.0800
KH75-3-5-2	1.0050	1.00	1.010		0.1350	0.00400	42	0.18000	0.04000	410	30.0	0.4400	0.0700
KH75-3-5-2	1.0050	1.00	1.010		0.1510	0.00500	32	0.11000	0.04000	370	70.0	0.2900	0.0500
KH75-3-5-2	2.0550	2.05	2.060		0.1500	0.00500	45	0.08000	0.02000	270	20.0	0.2900	0.0600
KH75-3-5-2	2.9700	2.96	2.980		0.1570	0.00300	34	0.08000	0.02000	250	20.0	0.3200	0.0600
KH75-3-5-2	3.7850	3.78	3.790		0.1180	0.00600	58	0.17000	0.04000	340	20.0	0.4900	0.0900
KH75-3-5-2	4.0950	4.08	4.110		0.0296	0.01900	82	0.05000	0.02000	180	80.0	0.3000	0.2200
KH75-3-5-2	4.1800				0.1210	0.00500	54	0.10000	0.03000	300	20.0	0.3300	0.0800
KH75-3-5-2	5.1500	5.13	5.170		0.1380	0.00400	44	0.30000	0.06000	410	20.0	0.7200	0.1000
KH75-3-5-2	6.1200				0.1440	0.00400	38	0.17000	0.04000	290	20.0	0.5800	0.1000
KH75-3-5-2	6.2150	6.20	6.230		0.1350	0.00300	23	0.15000	0.03000	190	20.0	0.7800	0.0800
KH75-3-5-2	7.1500	7.13	7.170		0.1420	0.00600	53	0.21000	0.05000	420	30.0	0.5100	0.0800
KH75-3-5-2	8.1400	8.13	8.150		0.1360	0.00600	47	0.24000	0.05000	390	20.0	0.6100	0.0900
KH75-3-5-2	8.6050	8.59	8.620		0.1180	0.00600	48	0.30000	0.11000	440	80.0	0.6700	0.1200
KH75-3-5-2	8.6050	8.59	8.620		0.0335	0.01400	89	0.31000	0.15000	260	30.0	1.1900	0.4300
KH75-3-5-2	8.9050	8.90	8.910		0.1490	0.00400	39	0.24000	0.04000	340	10.0	0.7200	0.1000
KH75-3-11-2	2.1900	2.18	2.200		0.0221	0.00600	103			275	92.0	<0.0300
KH75-3-11-2	8.6500	8.64	8.660		0.1330	0.00400	62	0.01300	0.01000	1050	220.0	0.0130	0.0060
KH80-3-18	3.9700				0.1400	0.01800	35	0.00900	0.00900	310	10.0	0.0300	0.0300
KH80-3-18	5.3000	5.29	5.310		0.1400	0.00700	56	0.05300	0.02500	440	80.0	0.1200	0.0400
KH80-3-22	4.0300				0.1280	0.00500	52	0.04700	0.01300	1040	70.0	0.0500	0.0100
KH80-3-22	5.0050	5.00	5.010		0.1440	0.00600	45	0.09500	0.04000	1080	230.0	0.0900	0.0200
KH80-3-22b	2.0050	2.00	2.010		0.1180	0.00600	77	0.07900	0.02700	670	110.0	0.1200	0.0200
KH80-3-22b	5.5100	5.50	5.520		0.1180	0.00800	60	0.52000	0.21000	660	130.0	0.7900	0.1700
KH80-3-28	2.0050	2.00	2.010		0.1250	0.00700	51	0.13000	0.04000	1230	230.0	0.1100	0.0200
KH80-3-28	6.0050	6.00	6.010		0.1140	0.00800	44	0.13000	0.05000	600	100.0	0.2200	0.0400
KH80-3-28	10.5000	10.49	10.510		0.1410	0.06000	49	0.53000	0.17000	510	90.0	1.0500	0.1400
KH80-3-30	10.0100	9.99	10.030		0.1220	0.00800	56	0.10000	0.50000	210	40.0	0.4700	0.1500
43-386				43-386-42-3,30-31	0.2230	0.00039	5	0.00065	0.00158	10	1.1	0.0700	0.1500
43-386				43-386-42-3,109-110	0.1740	0.00050	16	0.00090	0.00080	190	10.0	0.0047	0.0044
43-387				43-387-30-1,140-141	0.1970	0.00150	14					<0.0300