tab delimited contribution id version timestamp contributor data_model_version reference lab_names description 20711 3 2026-07-07T18:42:19.788Z @polarwander 3.0 10.1016/J.PRECAMRES.2003.10.002 Not Determined (For Legacy Datasets Only) Adds site-level directions and VGPs (24 sites, from Irving et al. 2004 Table 1) — the 17-dyke pole plus the Labine Group and Hottah Gabbro field-test rocks, with an ages table; the previous contribution (13653) held only the location-level pole. >>>>>>>>>> tab delimited locations location sites location_type result_name result_type result_quality method_codes citations geologic_classes lithologies lat_s lat_n lon_w lon_e continent_ocean country age age_sigma age_low age_high age_unit dir_tilt_correction dir_dec dir_inc dir_alpha95 dir_k dir_n_sites dir_n_samples dir_n_specimens contact_test pole_lat pole_lon pole_alpha95 pole_k pole_n_sites description Cleaver Dykes 5:6:8:9:10:15:18:19:21:22:23:26:27:30:31:34:37 Region Cleaver Dykes ca. 1740 Ma pole a g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DE-VGP:DA-DIR-GEO:GM-UPB-CC:ST-C:ST-C-I 10.1016/j.precamres.2003.10.002 Intrusive Diabase 65.58 65.79 241.85 242.12 North America Canada 1736 1745 Ma 0 137.8 58.4 5.1 50.4 17 99 188 C+ 20.4 274.9 7.0 27.1 17 Paleomagnetic pole for the ca. 1740 Ma Cleaver Dykes, a swarm of subvertical, post-orogenic diabase dykes of the Great Bear magmatic zone (Hottah terrane), Wopmay Orogen, northwest Canadian Shield (Irving et al., 2004). U-Pb baddeleyite age 1740 +5/-4 Ma. Pole is the Fisher mean of the VGPs of the 17 Cleaver dyke site means of the published 'Cleaver magnetization' (single, SE-and-down 'normal' polarity carried by fine-grained magnetite, thermal unblocking 500-600 C). The Echo Bay re-sampling (site 172, the resampling of site 144 of Irving et al. 1972a) is excluded from the mean. Directions are in geographic coordinates; the subvertical dykes require no tilt correction. Positive baked-contact test (dyke 34/22 bake adjacent Labine Group andesite/tuff) and positive inverse baked-contact test (the younger ca. 1590 Ma Western Channel Diabase and ca. 780 Ma Hottah Gabbro that cut the dykes carry different directions) support that the magnetization is primary. Labine Group 24:32:33:35:36 Region Labine Group baked-contact and conglomerate tests a g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:ST-C:ST-G 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Tuff:Andesite:Volcaniclastic Breccia 65.07 65.65 241.92 241.95 North America Canada 1860 1880 Ma 0 Labine Group (Great Bear magmatic zone, ca. 1875 Ma; Ootes et al., 2015) host rocks used for the Cleaver Dykes field tests (Irving et al., 2004). The clearest positive baked-contact test is at dyke 34: baked andesite at the contact (site 35) carries the Cleaver magnetization while andesite 50 m away (site 36) retains a distinct pre-Cleaver direction (ST-C). A companion test is recorded at dyke 22 against Labine tuff (contact site 32, distal site 33); note that the Table 1 directions of Irving et al. (2004) for the dyke-22 tuff pair are inconsistent with the accompanying text (which reports the contact tuff in agreement with the dyke), so only the dyke-34 test is treated as unambiguous here. Site directions are archived exactly as published in Table 1. Andesite boulders in a Labine Group volcanic breccia (site 24) show dispersed directions (conglomerate test, ST-G), indicating the host has not been regionally remagnetized. Hottah Gabbro 45 Region Hottah (Gunbarrel) Gabbro ca. 780 Ma a g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM 10.1016/j.precamres.2003.10.002:10.1130/g19944.1 Intrusive Gabbro 65.67 65.67 241.95 241.95 North America Canada 779.6 0.7 Ma 0 Hottah Gabbro sheet (the 'Gunbarrel Gabbro' of Park et al., 1995), a ca. 780 Ma intrusion dated at Gunbarrel Inlet (SE Great Bear Lake) by U-Pb baddeleyite at 779.6 +/- 1.4 Ma (95% conf.; the Gunbarrel gabbro of Harlan et al., 2003) that post-dates and cuts the Cleaver Dykes. Its magnetization direction differs from the Cleaver magnetization, contributing to the positive inverse baked-contact test (the dykes were not overprinted by this younger event). >>>>>>>>>> tab delimited sites site location result_type result_quality method_codes citations geologic_classes geologic_types lithologies lat lon age age_sigma age_low age_high age_unit dir_tilt_correction dir_dec dir_inc dir_alpha95 dir_k dir_n_samples dir_n_specimens dir_polarity vgp_lat vgp_lon vgp_dp vgp_dm description 5 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.72 241.87 1736 1745 Ma 0 132.1 64.6 6.0 53.0 6 12 n 28.1 277.3 7.7 9.6 Cleaver dyke 6 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.72 241.92 1736 1745 Ma 0 168.0 65.3 7.9 39.0 5 10 n 23.5 250.7 10.4 12.8 Cleaver dyke 8 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.7 241.87 1736 1745 Ma 0 147.2 51.3 4.2 117.0 6 11 n 10.9 269.8 3.9 5.7 Cleaver dyke 9 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.68 241.85 1736 1745 Ma 0 143.5 49.7 4.2 107.0 6 12 n 10.2 273.2 3.7 5.6 Cleaver dyke 10 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.63 242.12 1736 1745 Ma 0 143.4 68.4 5.4 67.0 6 12 n 30.6 267.6 7.7 9.1 Cleaver dyke 15 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.62 241.98 1736 1745 Ma 0 126.2 56.8 3.3 177.0 6 12 n 21.1 285.4 3.5 4.8 Cleaver dyke 18 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.79 241.92 1736 1745 Ma 0 141.5 53.0 4.5 118.0 6 10 n 13.7 274.2 4.3 6.2 Cleaver dyke 19 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.79 241.93 1736 1745 Ma 0 116.9 52.6 9.7 33.0 6 8 n 20.1 294.6 9.2 13.4 Cleaver dyke 21 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.7 241.93 1736 1745 Ma 0 162.0 52.9 3.6 143.0 6 12 n 10.1 257.1 3.4 5.0 Cleaver dyke 22 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.7 241.93 1736 1745 Ma 0 136.1 59.8 4.6 90.0 6 12 n 21.7 276.4 5.2 6.9 Cleaver dyke (baked-contact test against Labine tuff sites 32/33) 23 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.7 241.93 1736 1745 Ma 0 124.9 53.9 3.5 155.0 6 12 n 18.7 287.5 3.4 4.9 Cleaver dyke 26 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.63 241.88 1736 1745 Ma 0 151.2 57.2 3.5 151.0 6 12 n 15.8 265.2 3.7 5.1 Cleaver dyke 27 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.68 241.85 1736 1745 Ma 0 170.5 76.4 10.0 20.0 6 12 n 40.0 247.2 17.2 18.5 Cleaver dyke 30 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.63 241.87 1736 1745 Ma 0 146.6 53.3 6.5 51.0 6 11 n 12.8 269.8 6.3 9.0 Cleaver dyke 31 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.58 242.02 1736 1745 Ma 0 118.0 50.6 5.6 145.0 3 6 n 17.9 294.5 5.1 7.5 Cleaver dyke 34 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.7 241.95 1736 1745 Ma 0 130.7 59.6 2.5 266.0 7 13 n 22.8 280.7 2.8 3.8 Cleaver dyke (baked-contact test against Labine andesite sites 35/36) 37 Cleaver Dykes i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 65.67 241.87 1736 1745 Ma 0 114.3 51.0 3.2 202.0 6 11 n 19.5 297.2 2.9 4.3 Cleaver dyke 172 Cleaver Dykes i b LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002 Intrusive Volcanic Dike Diabase 66.05 242.17 1736 1745 Ma 0 129.1 60.5 4.6 69.0 8 15 n 24.4 281.9 5.3 7.0 Cleaver dyke at Echo Bay ~50 km N (resampling of site 144 of Irving et al. 1972a); excluded from the published 17-site mean 24 Labine Group i b LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Volcanic Other Volcaniclastic Breccia 65.65 241.92 1860 1880 Ma 0 117.5 26.1 56.9 2.0 9 11 1.8 301.5 33.3 61.5 Andesite boulders in a Labine Group volcanic breccia; dispersed directions (conglomerate test) 32 Labine Group i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Tuff Tuff 65.07 241.93 1876.4 1.2 Ma 0 148.8 19.6 2.9 269.0 6 10 -11.3 273.3 1.6 3.0 Baked tuff at contact of dyke 22 (Table 1 footnote) 33 Labine Group i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Tuff Tuff 65.07 241.93 1876.4 1.2 Ma 0 131.5 59.6 5.1 104.0 7 9 22.1 279.9 5.8 7.7 Tuff 25 m from dyke 22 (Table 1 footnote) 35 Labine Group i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Lava Flow Andesite 65.07 241.95 1872.6 0.45 Ma 0 121.0 60.6 4.7 87.0 7 12 26.1 287.5 5.5 7.2 Baked andesite at contact of dyke 34; agrees with the dyke direction 36 Labine Group i b LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1139/cjes-2015-0026 Extrusive Lava Flow Andesite 65.07 241.95 1872.6 0.45 Ma 0 355.1 9.5 2.2 555.0 5 9 29.6 67.6 1.1 2.2 Andesite 50 m from dyke 34; distinct pre-Cleaver direction 45 Hottah Gabbro i g LP-DIR-AF:LP-DIR-T:DE-BFL:DE-FM:DA-DIR-GEO 10.1016/j.precamres.2003.10.002:10.1130/g19944.1 Intrusive Sill Gabbro 65.67 241.95 779.6 0.7 Ma 0 280.4 4.4 3.6 123.0 7 14 6.3 143.4 1.8 3.6 Hottah (Gunbarrel) Gabbro sheet ca. 780 Ma; direction differs from the Cleaver dykes >>>>>>>>>> tab delimited ages location age age_sigma age_low age_high age_unit timescale_eon timescale_era timescale_period description method_codes citations Cleaver Dykes 1740 1736 1745 Ma Proterozoic Paleoproterozoic Statherian U-Pb baddeleyite, modified York regression upper intercept 1740 +5/-4 Ma (Irving et al., 2004) GM-UPB-CC-T0 10.1016/j.precamres.2003.10.002 Labine Group 1876.4 1.2 Ma Proterozoic Paleoproterozoic Orosirian Labine Group rhyolite tuff, weighted-mean 207Pb/206Pb U-Pb 1876.4 +/- 2.4 Ma (95% conf.; Ootes et al., 2015) GM-UPB 10.1139/cjes-2015-0026 Labine Group 1872.6 0.45 Ma Proterozoic Paleoproterozoic Orosirian Labine Group andesite, U-Pb 1872.6 +/- 0.9 Ma (95% conf.; Ootes et al., 2015) GM-UPB 10.1139/cjes-2015-0026 Hottah Gabbro 779.6 0.7 Ma Proterozoic Neoproterozoic Tonian Gunbarrel gabbro (Gunbarrel Inlet, SE Great Bear Lake), U-Pb baddeleyite 779.6 +/- 1.4 Ma (95% conf.; Harlan et al., 2003) GM-UPB 10.1130/g19944.1