Jökull - 01.12.1992, Síða 44

TABLE 1. Paleomagnetic results from Langidalur valley, cont. - Niðurstöður segulstefnumælingajrh.
TM 7 3 0 207 -45
TM 8 4 0 193 -52
TM 9 3 TWO R, ONE
TM 10 3 0 162 -78
TM 11 3 0 333 72
TM 12 3 0 184 -66
TM 13 4 1 198 -80
TM 14 4 1 171 -61
TM 15 3 0 163 -61
TM 16 3 0 215 -72
TM 17 3 0 157 -68
TM 18 4 0 215 -72
TM 19 3 0 191 -62
TM 20 3 0 170 -26
TM 21 5 0 159 -2
TM 22 6 0 268 -64
TM 23 3 0 235 -70
TM 24 3 0 195 -57
TM 25 3 0 151 -84
TM 26 3 0 127 -75
TM26A 3 0 246 -74
TM 33 3 0 162 -81
TM 34 3 0 181 -49
TM 35 4 TWO R, , TWO
TM 36 3 0 202 -60
TM 37 3 0 175 -74
TM 38 3 0 171 -63
TM 39 3 0 225 -60
TM 40 3 0 226 -64
TM40A 3 0 216 -58
TM 41 3 0 163 -60
TM 42 3 0 210 -53
TM 43 4 0 195 -37
TM 44 4 0 23 49
TM 45 4 0 5 73
TM 46 4 0 78 53
303 -47 5 1.50 R
320 -56 37 0.60 R*
E >60 1.60 (R?)
88 -83 4 2.30 R
229 74 6 5.60 N
330 -72 6 3.00 R
201 -81 6 2.60 R
357 -66 5 0.40 R
10 -64 8 3.30 R
260 -72 4 2.00 R
31 -72 7 4.20 R
262 -71 8 0.90 R
319 -67 4 2.80 R
353 -38 25 1.90 RT’
3 -24 2 0.60 RT
229 -41 1 0.70 R
248 -61 2 0.90 R
315 -61 9 3.34 R
138 -75 3 5.81 R
86 -67 6 7.60 R
230 -61 2 0.80 R
121 -81 5 1.42 R
339 -54 2 2.49 R
N >60 1.26 ( ?!
303 -62 9 1.47 R
3 -84 5 3.49 R
358 -68 9 4.22 R
273 -55 3 4.05 R
266 -59 6 3.42 R
285 -56 11 2.40 R
10 -63 14 1.29 R
296 -53 8 3.94 R
320 -44 6 1.45 R
127 52 12 (2.29) N
141 82 4 5.41 N
65 35 4 7.24 NT
TN 43 3 0 30 70 93 71 6 4.76 N
TN 44 4 0 56 73 58 64 5 5.08 N
TN 45 3 0 44 83 16 73 9 5.97 N
TN 46 4 0 49 80 31 72 5 6.52 N
TN 47 3 0 130 79 6 48 7 1.61 N
TN 48 3 0 205 65 321 24 8 4.57 NT
TN 49 3 0 290 68 261 52 5 1.68 N
TN 50 3 0 2 76 139 87 6 4.04 N
TN 51 3 0 0 69 161 77 9 4.37 N
TN 52 3 0 6 78 37 87 4 6.23 N
TN 53 3 0 332 79 279 79 4 5.24 N
TN 54 3 0 17 76 77 82 4 10.61 N
TN 55 3 0 11 80 15 83 4 6.12 N
TN 57 3 0 139 74 5 40 10 1.02 NT
TN 58 3 0 155 74 355 37 10 2.81 NT
TN 59 3 0 162 75 351 37 4 3.24 NT
TN 60 3 0 148 77 358 43 2 8.35 N
TN 61 3 0 36 75 69 73 6 7.34 N
TN 62 4 0 14 76 81 84 4 6.10 N
TN 63 3 0 11 73 117 82 7 4.94 N
TN 66 6 0 53 43 94 38 10 1.98 NT
TN 70 4 0 65 38 84 30 10 1.46 NT
TN 73 4 0 72 46 74 32 11 2.07 NT
TN 75 3 0 355 44 167 50 2 3.45 N
TN 77 4 0 304 83 307 70 11 1.94 N
TN 78 4 0 227 -70 253 -65 3 5.77 R
TN 80 7 0 16 -74 150 -36 6 4.18 RT
TN 81 5 0 185 -83 166 -78 4 8.63 R
TN 82 4 0 170 -85 154 -75 3 6.57 R
TN 83 4 0 197 -78 237 -83 5 5.96 R
TN 84 3 0 118 -76 93 -64 24 6.95 R*
TN 85 4 0 160 -72 36 -77 3 6.74 R
N: number of samples collected, n: number of samples rejected. Dec, Inc: direction of best mean field, after tilt
correction. Lon, Lat: Coordinates of virtual geomagnetic pole. Alf: 95%- confidence angle for the best mean
field. J100: Average remanence intensity after 100 Oe AF demagnetization, in A/m. In brackets if significantly
affected by lightning. Pol: Paleomagnetic polarity, T if the V.G.P. latitude is less than 40°, * if Alf is greater
than 23.5°.
MAGNETIC ANOMALIES
The reverse polarity zone occurring in all ourpro-
files in Langidalur may be a partial cause of a negative
magnetic anomaly extending from the Blönduós area
to the north along the Skagi peninsula. It also continues
out to sea in the map of Kristjánsson et al. (1989), in
agreement with geologic evidence (Fig. 1 and Jóhann-
esson, unpubl.), which indicates a consistent northerly
strike in the area. However, it should be noted that each
magnetic anomaly lineation over the older parts of Ice-
land is most likely the integrated result of a number of
individual reverse polarity zones in the lava pile. Dis-
turbances from faulting, topography and other sources
will also complicate the anomaly pattern.
Immediately west of the negative anomaly on
Skagi and north of the syncline axis of Fig. 1 there
is a positive magnetic lineation which appears to be
an unbroken continuation of "Anomaly 5" parallel to
the Kolbeinsey ridge. This anomaly is expected to
be of 9.6-10.8 M.y. age according to Cande and Kent
(1992). The age difference of the order of 3 M.y. com-
pared to the syncline may have a number of expla-
nations including the presence of NW-trending tran-
scurrent faults off the north coast. Additional geologic
and geophy sical mapping in the region between Skaga-
fjörður and the NW-peninsula is needed to resolve this
problem.
42 JÖKULL, No. 42, 1992