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MacDougall, J Douglas (1979): (Table 1, pages 779) Alpha track determination of growth rates of manganese nodules, Pacific Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.881562, Supplement to: MacDougall, JD (1979): The distribution of total alpha radioactivity in selected manganese nodules from the North Pacific: implications for growth processes. In: Bischoff, J.L., Piper, D.Z. (Eds.), Marine Geology and Oceanography of the Pacific Manganese Nodule Province, Marine Science. Plenum Publishing Corporation, New York, U.S.A., 775-790, https://doi.org/10.1007/978-1-4684-3518-4_25

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Published: 1979 (exact date unknown) • DOI registered: 2017-11-08

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Abstract:
Analyses of the total alpha radioactivity distribution in 31 North Pacific manganese nodules yield an average growth rate of 6.8 ( 2) mm /m.y. Samples from a single box core show almost identical total activity vs. depth profiles, regardless of nodule size or shape. A characteristic feature of many nodules examined is an apparent change (steepening) in slope of the alpha activity profile between depths of 0.5-1.5 mm. This feature may reflect a fundamental feature of nodule growth, possibly mobility of 230Th or its daughters in a regular way, interrupted growth, or nodule turnover. Near-surface decreases in total alpha activity probably result from 226Ra loss.
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)
Coverage:
Median Latitude: 19.897853 * Median Longitude: -139.161059 * South-bound Latitude: -4.233034 * West-bound Longitude: 173.765000 * North-bound Latitude: 40.340000 * East-bound Longitude: -107.800000
Date/Time Start: 1950-08-05T00:00:00 * Date/Time End: 1976-08-27T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
DSV-53P-8  * Latitude: 14.970000 * Longitude: -125.000000 * Elevation: -5000.0 m * Location: Pacific Ocean * Method/Device: Box corer (BC)
DWBD1  * Latitude: 21.450000 * Longitude: -126.717000 * Date/Time: 1957-10-25T00:00:00 * Elevation: -4300.0 m * Location: Pacific Ocean * Campaign: DOWNWIND-B1 (DNWB0ABD) * Basis: Spencer F. Baird * Method/Device: Dredge (DRG)
EXPL60-4 (NEL-14)  * Latitude: 14.466667 * Longitude: -107.800000 * Date/Time: 1960-02-20T00:00:00 * Elevation: -3678.0 m * Recovery: 0.64 m * Location: Pacific Ocean * Campaign: Seattle-Norfolk_1960 * Basis: Explorer * Method/Device: Core (CORE)
Comment:
Alpha particle tracks are detected photographically in a cellulose nitrate detector. Growth rates are determined from the ratio 230Th/231Pa excess.
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventMacDougall, J Douglas
2 Latitude of eventLatitudeMacDougall, J Douglas
3 Longitude of eventLongitudeMacDougall, J Douglas
4 Elevation of eventElevationmMacDougall, J Douglas
5 Method/Device of eventMethod/DeviceMacDougall, J Douglas
6 IdentificationIDMacDougall, J Douglas
7 Sample code/labelSample labelMacDougall, J Douglas
8 DEPTH, sediment/rockDepth sedmMacDougall, J DouglasGeocode
9 Growth rateµmm/aMacDougall, J Douglas
10 Growth rate, standard deviationµ std dev±MacDougall, J Douglas
11 Deposit typeDeposit typeMacDougall, J Douglas
12 SizeSizemmMacDougall, J Douglas
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
164 data points

Data

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

1 
Event		2 
Latitude		3 
Longitude		4 
Elevation [m]		5 
Method/Device		6 
ID		7 
Sample label		8 
Depth sed [m]		9 
µ [mm/a]		10 
µ std dev [±]		11 
Deposit type		12 
Size [mm]
VITYAZ4221-TR 29.9667-125.9167-4325Trawl netVITYAZ4221-TR-1MDVitiaz A1786304.10.5Mn nodule
SCR-MR-A17875 22.5000-113.0000-3603Box corerSCR-MR-A17875-1MDMR A1787502.90.4Mn nodule
RISP-4PG 22.2833-117.4000-3890Trigger corerRISP-4PG-1MDRis 4G07.61.2Mn nodule
STYXII-48FF -4.2330-168.2834-5230GrabSTYX-48FF-1MDStyxx4808.90.8Mn nodule
DWBD1 21.4500-126.7170-4300DredgeDWBD1-1MDDWD BD106.61.4Mn nodule
SCR-MR-55 20.7330-114.7500-3740DredgeSCR-MR-55-1MDMR 55010.91.5Mn nodule
EXPL60-14D 19.3330-114.2000-3477Photo/VideoEXPL60-14D-1MDExplore A1786507.80.9Mn nodule
DSV-53P-8 14.9700-125.0000-5000Box corerDSV-53P-8-1MDDSV 53P-805.40.4Mn nodule
MW7402-13G08 14.9667-125.0033-4460Free-fall grabMW7402-13G08-1MDMn7402 FFG809.20.9Mn nodule
MW7402-13D01 15.0450-125.0917-4465Dredge, bucketMW7402-13D01-1MDMn7402 D105.00.4Mn nodule
MW7402-13D0115.0450-125.0917-4465Dredge, bucketMW7402-13D01-1MDMn7402 D105.90.4Mn nodule
EXPL60-4 14.4667-107.8000-3678CoreEXPL60-4-1-MDExpo 60-405.91.7Mn nodule
MPC-5-2 14.3667-133.1167-4816Gravity corerMPC-5-2-1MDMidPac 5-106.90.9Mn nodule
MPC-16-1 13.7467-149.2450-4564Gravity corerMPC-16-1-1MDMiidPac 16-102.82.3Mn nodule
MW7402-16G37 11.0936-140.0045-4800Free-fall grabMW7402-15G37-1MDMn7402 FFG3704.60.3Mn nodule
PLDS04MV-109BX 11.0720-140.0470-4722Box corerPLDS04MV-109BX-1MDMn7601 20-B206.70.4Mn nodule60
MSN-150G 10.9830-142.6170-4978Gravity corerMSN-150G-1MDMSN 150-G03.80.3Mn nodule
RP6OC75-25-51 14.2417-124.9750-4696Box corerRP6OC75-25-51-1F2-MDDOMES F205.90.4Mn nodule30
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1H2-MDDOMES H208.20.6Mn nodule25
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1V2-MDDOMES V206.60.6Mn nodule20
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1E3-MDDOMES E306.90.6Mn nodule20
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1R3-MDDOMES R306.00.9Mn nodule10
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1P2-MDDOMES P207.00.5Mn nodule30
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1U-MDDOMES U06.40.5Mn nodule40
RP6OC75-25-5114.2417-124.9750-4696Box corerRP6OC75-25-51-1M-MDDOMES M06.90.5Mn nodule45
SCR-MN-68 40.3400-175.6300-5307Box corerSCR-MN-68-1-MD1PUMICE Mn68-1010.71.5Mn nodule
SCR-MN-6840.3400-175.6300-5307Box corerSCR-MN-68-1-MD2PUMICE Mn68-206.81.0Mn nodule
SS72-111DB 40.3000173.7650-4397Dredge, bucketSS72-111DB-1MDPUMICE Mn67-1010.71.9Mn nodule
SS72-111DB40.3000173.7650-4397Dredge, bucketSS72-111DB-1MDPUMICE Mn67-206.71.2Mn nodule
SCR-MN-61 31.2900174.0300-5362Box corerSCR-MN-61-1MDPUMICE Mn6106.70.5Mn nodule
SCR-MN-70 38.9400178.6200-5398Box corerSCR-MN-70-1MDPUMICE 70-1011.21.1Mn nodule