tab delimited contribution id version timestamp contributor data_model_version reference lab_names 20717 1 2026-07-08T22:22:12.713Z @polarwander 3.0 10.1139/E76-086 Not Determined (For Legacy Datasets Only) >>>>>>>>>> tab delimited locations location sites location_type result_name result_type result_quality method_codes citations geologic_classes lithologies terranes lat_s lat_n lon_w lon_e continent_ocean country state_province age age_low age_high age_unit dir_tilt_correction dir_dec dir_inc dir_alpha95 dir_k dir_n_sites pole_lat pole_lon pole_alpha95 pole_k pole_n_sites description Mistastin Pluton 36:37:38:41:42:43:44:8:16 Region Mistastin Pluton ca. 1441 Ma pole a g LP-DIR-AF:LP-DIR-T:DE-BLANKET:DE-BFL:DE-FM:DE-VGP 10.1139/e76-086:10.1016/j.epsl.2015.02.011:10.1016/j.pss.2009.09.018 Intrusive Quartz monzonite Laurentia 55.59 55.922 296.41 296.603 North America Canada Newfoundland and Labrador 1441 1419 1463 Ma 0 90.4 3.8 8.7 36.2 9 -1.4 205.1 7.3 51.3 9 Paleomagnetic pole for the ca. 1441 Ma Mistastin Pluton, a quartz-monzonite (adamellite) intrusion of the anorthosite-quartz-monzonite suite in Labrador, north of the Grenville Front. The pole is the Fisher mean of the in-situ site virtual geomagnetic poles from nine sites, combining the primary, shallow characteristic remanence isolated from seven quartz-monzonite sites by Fahrig & Jones (1976) using alternating-field demagnetization with two basement sites of Herve et al. (2015) that escaped thermal overprinting by the ca. 36 Ma Mistastin Lake impact and retain the Mesoproterozoic direction (isolated by thermal and alternating-field demagnetization with principal-component analysis). Computed from the seven Fahrig & Jones (1976) sites alone, the pole lies at 1.0 S, 201.6 E (A95 7.7 deg), reproducing the previous Nordic compilation pole (GPMDB 2271); adding the two Herve et al. (2015) basement sites shifts the combined pole reported here about 3.5 deg with little change in A95, and the two poles are statistically indistinguishable, although the combined nine-site set does not pass a bootstrap common-mean test between the two studies or a bootstrap reversal test. Basement sites cored within a metre of the impact-melt contact (retained here with quality 'b') were remagnetized to the impact direction, whereas sites farther from the contact preserve the pre-impact magnetization -- a qualitative impact-baking relationship rather than a formal baked-contact test. Age from four LA-ICP-MS U-Pb zircon Concordia Ages spanning 1429-1451 Ma on the target-basement phases of the Mistastin batholith (mangerite, two granodiorites and anorthosite; Marion & Sylvester, 2010), whose 2 sigma envelope (1419-1463 Ma) brackets the adopted pole age of 1441 Ma and supersedes the Rb-Sr ca. 1346 Ma of Fahrig & Jones (1976). >>>>>>>>>> tab delimited sites site location result_type result_quality method_codes citations geologic_classes geologic_types lithologies lat lon age age_low age_high age_unit dir_tilt_correction dir_dec dir_inc dir_alpha95 dir_k dir_n_samples vgp_lat vgp_lon vgp_dp vgp_dm description 36 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 89.6 9.8 12.9 28.0 6 4.296551429829492 23.94509803469048 6.59326138464966 13.042474601238878 37 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 95.2 2.3 17.3 13.0 7 -1.9852647372825816 21.467486898022894 8.660461149245 17.310457988276248 38 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 74.5 15.7 33.8 4.9 6 15.329623822637028 34.73761650059762 17.882054747837397 34.76818805968767 41 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 276.5 0.1 14.3 23.0 6 3.709187150269374 201.0682478402713 7.15001633512987 14.30001633512054 42 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 98.0 3.6 2 -3.0191329746358315 18.78346589003696 43 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 93.5 15.6 8.9 58.0 6 4.582824713530637 19.031351173226184 4.705202676319064 9.151645078262124 44 Mistastin Pluton i g LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 106.1 1.9 2 -8.222037057375214 12.487904446983546 34 Mistastin Pluton i b LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 209.7 83.6 11.6 28.0 7 44.23132776040648 287.70427081448594 22.366275421012343 22.779323733760982 35 Mistastin Pluton i b LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 74.0 17.0 6 16.17935201958259 34.75587459545331 39 Mistastin Pluton i b LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 355.0 77.8 17.4 11.0 8 78.72155815342126 286.22244181573495 30.688520535713423 32.67966515499855 40 Mistastin Pluton i b LP-DIR-AF:DE-BLANKET:DE-FM 10.1139/e76-086 Intrusive Pluton Quartz monzonite 55.59 296.40999999999997 1441 1419 1463 Ma 0 276.2 46.6 19.5 10.0 7 26.07727418105245 218.3206234526959 16.140595395890603 25.089504188798426 8 Mistastin Pluton i g LP-DIR-T:LP-DIR-AF:DE-BFL:DE-FM 10.1016/j.epsl.2015.02.011 Intrusive Pluton Quartz monzonite 55.9218 296.6033 1441 1419 1463 Ma 0 257.2 9.3 9.8 33.0 8 -3.217908054191043 219.84015320422864 4.997892960982762 9.89740885460746 basement 13 Mistastin Pluton i b LP-DIR-T:LP-DIR-AF:DE-BFL:DE-FM 10.1016/j.epsl.2015.02.011 Intrusive Pluton Quartz monzonite 55.8322 296.641 1441 1419 1463 Ma 0 187.1 -67.1 3.7 168.0 10 -82.61194972047322 258.30119018054154 5.088525400552584 6.13637417080226 melt + basement 15 Mistastin Pluton i b LP-DIR-T:LP-DIR-AF:DE-BFL:DE-FM 10.1016/j.epsl.2015.02.011 Intrusive Pluton Quartz monzonite 55.8322 296.6469 1441 1419 1463 Ma 0 181.0 -60.7 8.7 78.0 5 -75.8535236114432 293.5906757670164 10.125194231239426 13.273220393844372 baesment 16 Mistastin Pluton i g LP-DIR-T:LP-DIR-AF:DE-BFL:DE-FM 10.1016/j.epsl.2015.02.011 Intrusive Pluton Quartz monzonite 55.8915 296.5953 1441 1419 1463 Ma 0 262.4 6.1 11.7 34.0 6 -1.7122008281407302 214.6045441539422 5.899967054878473 11.749860811267352 basement >>>>>>>>>> tab delimited ages location age age_sigma age_unit timescale_eon timescale_era timescale_period description method_codes timescale_citations citations Mistastin Pluton 1451.0 6.0 Ma Proterozoic Mesoproterozoic Calymmian LA-ICP-MS U-Pb zircon Concordia Age of the mangerite (sample W05-45) of the Mistastin batholith target basement; 1451 +/- 12 Ma (2 sigma), Marion & Sylvester (2010). GM-UPB Gradstein et al. 2004 10.1016/j.pss.2009.09.018 Mistastin Pluton 1440.0 6.5 Ma Proterozoic Mesoproterozoic Calymmian LA-ICP-MS U-Pb zircon Concordia Age of the granodiorite gneiss (sample CM001) of the Mistastin batholith target basement; 1440 +/- 13 Ma (2 sigma), Marion & Sylvester (2010). GM-UPB Gradstein et al. 2004 10.1016/j.pss.2009.09.018 Mistastin Pluton 1438.7 4.45 Ma Proterozoic Mesoproterozoic Calymmian LA-ICP-MS U-Pb zircon Concordia Age of the anorthosite (sample CM032) of the Mistastin batholith target basement; 1438.7 +/- 8.9 Ma (2 sigma), Marion & Sylvester (2010). GM-UPB Gradstein et al. 2004 10.1016/j.pss.2009.09.018 Mistastin Pluton 1429.0 5.0 Ma Proterozoic Mesoproterozoic Calymmian LA-ICP-MS U-Pb zircon Concordia Age of the granodiorite (sample CM003) of the Mistastin batholith target basement; 1429 +/- 10 Ma (2 sigma), Marion & Sylvester (2010). The four target-basement Concordia Ages (1429-1451 Ma) are within 2 sigma of each other; their 2 sigma envelope (1419-1463 Ma) brackets the adopted pole age and supersedes the Rb-Sr age of Fahrig & Jones (1976). GM-UPB Gradstein et al. 2004 10.1016/j.pss.2009.09.018