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Koyama, Masato; Cisowski, Stanley M; Pezard, Philippe A (1992): (Table 1) Paleomagnetic of ODP Leg 126 sites [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.773471, Supplement to: Koyama, M et al. (1992): Paleomagnetic evidence for northward drift and clockwise rotation of the Izu-Bonin Forearc since the Early Oligocene. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 353-370, https://doi.org/10.2973/odp.proc.sr.126.143.1992

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Abstract:
A paleomagnetic study was made on the deep-marine sediments and volcanic rocks drilled by Ocean Drilling Program Leg 126 in the Izu-Bonin forearc region (Sites 787, 792, and 793). This study evaluates the sense and amount of the tectonic drift and rotation associated with the evolution of the Philippine Sea Plate and the Izu-Bonin Arc. Alternating-field and thermal demagnetization experiments show that most of the samples have stable remanence and are suitable for paleomagnetic studies. Paleomagnetic declinations were recovered by two methods of core orientation, one of which uses a secondary viscous magnetization vector of each specimen as an orientation standard, and the other of which is based on the data of downhole microresistivity measurement obtained by using a formation microscanner. Oligocene to early Miocene samples show 10° to 14° shallower paleolatitudes than those of the present. Middle Miocene to early Oligocene samples show progressive clockwise
deflections (up to ~80°) in declination with time. These results suggest large northward drift and clockwise rotation of the Izu-Bonin forearc region since early Oligocene time. Considering previous paleomagnetic results from the other regions in the Philippine Sea, this motion may reflect large clockwise rotation of the whole Philippine Sea Plate over the past 40 m.y.
Project(s):
Coverage:
Median Latitude: 31.960337 * Median Longitude: 140.672267 * South-bound Latitude: 31.105910 * West-bound Longitude: 140.379300 * North-bound Latitude: 32.399400 * East-bound Longitude: 140.888100
Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-06-17T18:55:00
Minimum Elevation: -3265.0 m * Maximum Elevation: -1798.0 m
Event(s):
126-787B  * Latitude: 32.375700 * Longitude: 140.749400 * Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-04-27T12:00:00 * Elevation: -3265.0 m * Penetration: 320.1 m * Recovery: 159.88 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 320.1 m cored; 0 m drilled; 49.9 % recovery
126-792E  * Latitude: 32.399400 * Longitude: 140.379300 * Date/Time Start: 1989-05-19T04:55:00 * Date/Time End: 1989-05-26T06:40:00 * Elevation: -1798.0 m * Penetration: 885.9 m * Recovery: 362.07 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 750.3 m cored; 0 m drilled; 48.3 % recovery
126-793B  * Latitude: 31.105910 * Longitude: 140.888100 * Date/Time Start: 1989-05-27T18:10:00 * Date/Time End: 1989-06-17T18:55:00 * Elevation: -2975.0 m * Penetration: 1682 m * Recovery: 697.94 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 114 cores; 1095.5 m cored; 0 m drilled; 63.7 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEvent
Sample code/labelSample labelKoyama, MasatoDSDP/ODP/IODP sample designation
NRM, IntensityInten (NRM)mA/mKoyama, Masato
Median demagnetizing fieldMDFmTKoyama, Masato
NRM, DeclinationDecl (NRM)degKoyama, Masatowith lower coercivity
NRM, InclinationIncl (NRM)degKoyama, Masato
NRM, DeclinationDecl (NRM)degKoyama, Masatostable remanence component
NRM, DeclinationDecl (NRM)degKoyama, Masatoazimuthally oriented declination of stable remanence component
NRM, InclinationIncl (NRM)degKoyama, Masatostable remanence component
Size:
1186 data points

Data

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


Event

Sample label

Inten (NRM) [mA/m]

MDF [mT]

Decl (NRM) [deg]
(with lower coercivity)

Incl (NRM) [deg]

Decl (NRM) [deg]
(stable remanence component)

Decl (NRM) [deg]
(azimuthally oriented declinat...)

Incl (NRM) [deg]
(stable remanence component)
126-787B 126-787B-6R-1,62-6490.0039148.4-32.0
126-787B126-787B-7R-1,11-13128.0030-17.934.1
126-787B126-787B-7R-1,58-6098.1020-75.637.2
126-787B126-787B-9R-1,40-4258.7037-77.8-43.8
126-787B126-787B-10R-1,86-8847.503544.853.3
126-787B126-787B-11R-1,17-192.713516.559.4
126-787B126-787B-11R-1,142-1445.495088.6-48.8
126-787B126-787B-14R-1,51-534.1723-31.857.2239.6271.4-25.9
126-787B126-787B-16R-3,114-11637.1030109.935.2
126-787B126-787B-18R-1,23-25147.0030-45.140.6
126-787B126-787B-19R-2,143-14549.0031251.943.9
126-787B126-787B-19R-3,84-86289.0037-16.728.7239.7256.414.9
126-787B126-787B-20R-1,70-72108.0031-37.142.7-29.37.8-20.7
126-787B126-787B-20R-2,102-104425.0042125.767.992.6-33.1-33.0
126-787B126-787B-24R-1,74-7675.2035258.3-40.3
126-787B126-787B-24R-2,42-4446.004689.749.3-67.6-157.3-48.0
126-787B126-787B-24R-2,87-8976.2030-83.1-32.7
126-787B126-787B-24R-3,89-9148.1037-55.856.5-63.2-7.4-45.7
126-787B126-787B-25R-1,123-12593.1042-57.045.793.4150.4-18.2
126-787B126-787B-25R-3,8-10119.0032295.7-42.1
126-787B126-787B-26R-1,32-34184.0034-65.646.5
126-787B126-787B-26R4,51-53211.0037151.647.0
126-787B126-787B-28R4,60-62150.0031-78.4-26.6
126-787B126-787B-28R-5,106-10846.5023-48.727.8
126-787B126-787B-29R-3,50-5276.9026-44.533.0
126-787B126-787B-30R-2,42-44103.002830.824.2
126-792E 126-792E-1R-1,58-6029.906-81.251.7227.9309.159.7
126-792E126-792E-6R-1,104-106194.0038196.343.796.7-99.643.9
126-792E126-792E-9R-1,136-138129.002767.683.6163.896.245.0
126-792E126-792E-9R-3,53-5520.7059228.8-64.4
126-792E126-792E-15R-l,6-8192.0042275.4-49.8
126-792E126-792E-15R-1,35-376020.008346.1-31.3
126-792E126-792E-15R-1,86-88263.008319.450.7
126-792E126-792E-15R-2,28-301420.0088.012.6
126-792E126-792E-17R-1,87-89124.0035-36.663.7194.5231.163.7
126-792E126-792E-17R-2,33-35110.0012115.380.0-60.2-175.543.9
126-792E126-792E-17R4,39-41181.005548.3-20.5
126-792E126-792E-18R-1,28-3061.803225.130.5
126-792E126-792E-18R-2,26-2816.7059161.7-53.7
126-792E126-792E-18R-2,62-6446.607235.4-36.6
126-792E126-792E-18R-3,82-8449.3042206.8-47.2
126-792E126-792E-19R-1,83-8596.2053220.2-34.9
126-792E126-792E-19R-2,97-9967.50247.543.3
126-792E126-792E-20R-1,136-13845.4043191.9-29.3
126-792E126-792E-21R-1,107-10918.4075238.9-36.9
126-792E126-792E-22R-1,89-91183.003959.937.0
126-792E126-792E-23R-1,49-51142.0017142.252.0
126-792E126-792E-23R-1,64-6663.8013131.744.0
126-792E126-792E-23R-2,20-22132.0027122.651.2
126-792E126-792E-24R-1,91-9322.7025-50.731.8
126-792E126-792E-30R-1,14-1621.9038323.7-38.0
126-792E126-792E-33R-1,16-1821.3021296.541.4
126-792E126-792E-33R-1,96-98139.009162.821.6
126-792E126-792E-36R-1,47-4985.002812.721.8100.587.852.2
126-792E126-792E-36R-1,65-6762.80300.42.999.899.437.8
126-792E126-792E-36R-3,37-3941.502160.442.5
126-792E126-792E-36R-3,94-9644.302725.431.6158.8133.449.7
126-792E126-792E-36R-5,23-2591.302525.139.548.523.447.0
126-792E126-792E-37R-1,91-9381.002716.433.3-40.9-57.333.5
126-792E126-792E-37R-2,27-2947.0032-2.544.7154.8157.337.4
126-792E126-792E-37R-3,28-3038.603221.227.7126.5105.38.2
126-792E126-792E-38R-1,59-61188.00307.3-7.2230.9223.652.3
126-792E126-792E-38R-2,124-126126.0029-20.539.8258.1278.641.6
126-792E126-792E-38R-3,12-1443.802934.40.8183.2148.838.5
126-792E126-792E-38R-3,44-4638.3032-56.77.3104.1160.854.8
126-792E126-792E-43R-3,125-12798.503428.043.8
126-792E126-792E-43R4,95-97390.001045.821.0
126-792E126-792E-43R4,111-113120.002241.319.8
126-792E126-792E-46R-5,33-3528.1025241.546.2
126-792E126-792E-46R-5,40-42108.0034148.6-3.5
126-792E126-792E-48R-1,56-5851.0021323.433.7
126-792E126-792E-48R4,26-2856.603252.418.2
126-792E126-792E-48R4,35-37145.004082.9-23.8
126-792E126-792E-48R-5,32-3471.402982.024.4
126-792E126-792E-49R-3,29-3179.2035185.432.86.0-179.445.4
126-792E126-792E-49R-6,104-106142.0020235.174.6209.1-26.024.2
126-792E126-792E-50R-2,66-68261.0033-14.2-19.4153.1167.349.8
126-792E126-792E-52R-1,49-5196.203581.041.615.4-65.6-33.7
126-792E126-792E-52R-2,74-76207.0021-27.32.7-19.87.5-35.2
126-792E126-792E-52R-3,112-11499.9030-9.937.5261.6271.5-39.2
126-792E126-792E-52R4,128-130155.00334.330.6-64.8-69.1-71.3
126-792E126-792E-52R-5,64-6685.404252.739.4-75.6-128.3-15.8
126-792E126-792E-54R-3,91-9310.8041258.7-28.4
126-792E126-792E-55R-2,44-4636.4013299.2-33.8
126-792E126-792E-55R-6,32-3451.803120.724.6163.5142.853.4
126-792E126-792E-58R-1,99-101309.0016-80.7-9.8264.0344.739.5
126-792E126-792E-58R-2,109-111147.003046.457.8156.8110.436.2
126-792E126-792E-58R-3,68-70340.0029-29.75.0247.5277.28.6
126-792E126-792E-58R-6,7-9160.002920.010.4104.584.523.2
126-792E126-792E-71R-3,30-32758.0011299.141.9
126-792E126-792E-71R-3,40-421510.003-37.7-42.4114.4152.133.2
126-792E126-792E-75R-2,81-831120.0021-8.2-0.5156.9165.1-47.5
126-792E126-792E-76R-1,143-1451780.006018.97.9170.3151.4-14.7
126-793B 126-793B-3R-1,19-2142.703270.459.2-32.5-102.9-20.8
126-793B126-793B-3R-2,56-5848.803149.063.8-22.9-71.9-26.1
126-793B126-793B-3R-3,83-8547.3044-54.339.7113.6167.9-43.9
126-793B126-793B-4R-1,54-5663.503826.725.4262.9236.2-32.7
126-793B126-793B-4R-2,15-1760.801914.3-58.563.449.1-35.6
126-793B126-793B-4R-3,24-2664.5024-69.7-37.4156.2225.9-49.4
126-793B126-793B-5R-2,82-8444.7033149.8149.8-54.8
126-793B126-793B-5R-3,90-9264.8037-12.275.0-34.5-22.3-44.3
126-793B126-793B-5R-5,72-7458.10383.064.8130.9127.9-49.2
126-793B126-793B-8R-1,84-8645.9034-16.875.5111.7128.564.0
126-793B126-793B-9R-1,124-12620.903096.058.1
126-793B126-793B-9R-2,52-5449.103142.627.9
126-793B126-793B-9R-2,75-77149.0045338.0-34.2
126-793B126-793B-9R-3,26-2863.7048227.3-37.4
126-793B126-793B-15R-4,78-8038.0024212.136.1
126-793B126-793B-15R-4,103-10563.304134.6-28.5
126-793B126-793B-15R-4,115-1174.203889.5-21.8
126-793B126-793B-16R-1,25-2715.503246.9-32.0
126-793B126-793B-16R-1,100-10222.0024272.727.2
126-793B126-793B-18R-2,61-6360.803055.831.0-55.4-111.2-11.1
126-793B126-793B-19R-3,107-109624.00412.466.8-65.6-78.038.3
126-793B126-793B-20R-4,39-41187.0081.1-73.342.341.2-29.4
126-793B126-793B-20R-4,71-7389.00962.342.353.8-8.5-29.2
126-793B126-793B-20R-6,75-7766.1039-66.2-11.870.6136.8-27.7
126-793B126-793B-21R-1,71-7317.6028133.062.139.6-93.4-19.1
126-793B126-793B-21R-3,17-19305.0014111.925.4182.971.040.0
126-793B126-793B-24R-4,90-92186.0022212.455.5
126-793B126-793B-28R-1,28-3064.1032-9.5-10.766.976.4-23.4
126-793B126-793B-28R-4,94-9649.4042-6.026.9252.9258.9-27.9
126-793B126-793B-29R-3,95-97117.0028-4.0-16.5-41.6-43.6-29.6
126-793B126-793B-29R-4,87-8980.5040137.949.445.5-92.4-27.2
126-793B126-793B-30R-5,103-105287.0033-135.0-39.3
126-793B126-793B-31R-1,64-66183.003140.319.241.81.5-38.8
126-793B126-793B-31R-4,66-6826.7018-12.630.4-206.0-193.345.2
126-793B126-793B-31R-5,126-128195.002333.027.353.420.443.9
126-793B126-793B-31R-6,103-105186.0029-0.667.6196.3196.941.7
126-793B126-793B-33R-3,39-41112.0027-14.851.2-52.4-37.634.8
126-793B126-793B-33R-5,77-79428.0023-64.626.5
126-793B126-793B-33R-6,32-3498.0027-26.733.7-19.07.733.1
126-793B126-793B-34R-3,91-93166.003478.720.9239.4160.7-19.5
126-793B126-793B-35R-3,102-104356.0020192.941.8
126-793B126-793B-36R-2,71-73207.0012183.939.7
126-793B126-793B-36R-4,8-10230.0012125.24.1
126-793B126-793B-36R-4,37-39188.0010181.933.9
126-793B126-793B-37R-1,88-9091.908225.80.5
126-793B126-793B-37R-2,89-91185.0029312.2-12.3
126-793B126-793B-40R-3,73-7545.2015251.555.5
126-793B126-793B-42R-3,46-4870.303014.4-5.4261.8247.4-33.4
126-793B126-793B-42R-4,44-46132.0036192.759.2113.0-79.7-35.2
126-793B126-793B-43R-2,106-10885.4030196.2-32.3106.1-90.120.9
126-793B126-793B-43R-4,21-2311.1029119.4-42.6
126-793B126-793B-46R-4,110-11238.703337.93.9-55.6-93.5-15.0
126-793B126-793B-46R-6,41-4320.403920.621.7236.0215.4-20.5
126-793B126-793B-51R-3,100-102114.0015239.547.1
126-793B126-793B-54R-2,53-5543.0013118.720.5
126-793B126-793B-55R-2,65-67362.002121.148.371.650.559.8
126-793B126-793B-55R-2,125-127172.001775.353.1144.369.030.9
126-793B126-793B-56R-2,117-119446.002665.0-14.6146.481.430.9
126-793B126-793B-56R-3,128-130344.002142.730.5
126-793B126-793B-58R-5,51-53337.00305.524.3216.5211.040.7
126-793B126-793B-58R-7,104-106526.0027-2.541.7
126-793B126-793B-65R-5,47-49194.0014-7.870.9175.2183.031.7
126-793B126-793B-65R-7,11-13565.0020259.1-14.1-26.6-285.743.3
126-793B126-793B-66R-1,27-29258.0030159.028.215.6-143.418.6
126-793B126-793B-66R-5,13-15735.001968.748.6130.661.939.4
126-793B126-793B-68R-1,131-133304.002788.24.7209.7121.529.6
126-793B126-793B-69R-1,56-58170.002678.655.2128.950.324.4
126-793B126-793B-69R-3,121-123171.001549.137.0152.2103.138.5
126-793B126-793B-69R-5,76-7875.3010250.4-34.1
126-793B126-793B-70R-5,19-21174.0026328.124.3
126-793B126-793B-71R-2,136-138261.0031280.2-35.2
126-793B126-793B-71R-6,28-30130.0034278.8-39.3
126-793B126-793B-71R-7,18-20177.0038242.4-23.0
126-793B126-793B-72R-4,63-65139.0030284.7-27.9
126-793B126-793B-72R-5,30-3237.7031297.9-33.6
126-793B126-793B-74R-1,15-17193.003254.5-29.4
126-793B126-793B-75R-4,55-57465.0031-14.238.8-39.8-25.6-23.1
126-793B126-793B-78R-4,89-91235.002218.218.2208.5190.3-18.6
126-793B126-793B-78R-6,15-17220.001791.225.2
126-793B126-793B-80R-5,56-58106.0018255.3-21.2
126-793B126-793B-80R-7,14-1627.0028239.2-26.5
126-793B126-793B-92R-3,11-131050.001828.927.5
126-793B126-793B-99R-1,133-1351340.00257.236.5
126-793B126-793B-104R-2,36-38299.00235.918.5165.8159.99.9
126-793B126-793B-104R-3,82-S4427.0017-14.940.1-36.5-21.615.1
126-793B126-793B-104R-4,46-48449.001735.748.3205.5169.88.0
126-793B126-793B-110R-1,18-20652.0018-4.072.6227.0231.024.4
126-793B126-793B-110R-2,68-70943.0013109.467.390.0-19.429.7
126-793B126-793B-110R-4,16-18846.0017181.346.9268.687.337.0
126-793B126-793B-112R-2,11-131210.001689.321.7