tab contribution id doi version timestamp magic_version contributor author description 5292 10.1139/e92-003 1 2006-12-20T11:10:53.000Z 2.2 @magic >>>>>>>>>> tab delimited er_locations er_location_name location_type location_begin_lat location_begin_lon location_end_lat location_end_lon continent_ocean country region location_class location_lithology location_description er_citation_names Thumb Mountain Formation, Zn-Pb ore Outcrop 75.5 263.5 75.5 263.5 North America Canada Little Cornwallis Island Sedimentary : Metamorphic Limestone : lead-zinc ore Polaris Mississippi Valley-type Zn-Pb ore deposit. This study >>>>>>>>>> tab delimited er_ages er_location_name age_range_low age_range_high age_unit timescale_eon timescale_era timescale_period timescale_epoch magic_method_codes er_timescale_citation_names er_citation_names Thumb Mountain Formation, Zn-Pb ore 444 472 Ma Phanerozoic Paleozoic Ordovician Middle Ordovician : Late Ordovician GM-FOSSIL Gradstein et al. 2004 This study >>>>>>>>>> tab delimited er_citations MAGIC00394372 er_citation_name long_authors year title citation_type journal volume pages book_title book_editors publisher city iaga_database iaga_ref_no This study Symons, D.T.A. and Sangster, D.F. 1992 Late Devonian paleomagnetic age for the Polaris Mississippi Valley-type Zn-Pb deposit, Canadian Arctic Archipelago Journal Canadian Journal of Earth Sciences 29 15-25 GPMDB 2509 As & Zijderveld 1958 As, J.A. and Zijderveld, J.D.A. 1958 Magnetic cleaning of rocks in paleomagnetic research Journal Geophysical Journal International 1 308-319 Collinson 1983 Collinson, D.W. 1983 Book 503 Methods in rock magnetism and Paleomagnetism: Techniques and instrumentation Chapman and Hall London Cox & Doell 1960 Cox, A. and Doell, R.R. 1960 Review of paleomagnetism Journal Geological Society of America Bulletin 71 645 Gradstein et al. 2004 Gradstein, F.M., Ogg, J.G. and Smith, A.G. 2004 Book 588 A Geologic Time Scale Cambridge University Press Cambridge McElhinny & McFadden 2000 McElhinny, M.W. and McFadden, P.L. 2000 Serial Book International Geophysics Series 73 1-1 Paleomagnetism: continents and oceans Dmowska, R., Holton, J.R. and Rossby, H.T. Academic Press San Diego Wilson 1961 Wilson, R.L. 1961 Palaeomagnetism in Northern Ireland, Part I. The thermal demagnetization of natural magnetic moments in rocks Journal Geophysical Journal London 5 45-58 >>>>>>>>>> tab delimited pmag_results pmag_result_name er_location_names data_type fold_test conglomerate_test contact_test reversal_test rock_magnetic_test pole_comp_name average_lat average_lon average_age_low average_age_high average_age_unit average_inc average_dec average_alpha95 average_n average_nn average_k vgp_lat vgp_lon vgp_dp vgp_dm tilt_correction tilt_k_ratio tilt_n tilt_inc_corr tilt_dec_corr tilt_k_corr tilt_alpha95_corr tilt_inc_uncorr tilt_dec_uncorr tilt_k_uncorr tilt_alpha95_uncorr fold_test_significance percent_reversed iaga_database iaga_res_no result_description magic_method_codes er_citation_names 6459 Thumb Mountain Formation, Zn-Pb ore i F+ ND ND ND M A 75.5 263.5 359 385 Ma -31.1 145.8 5.9 24 203 26.2 28.6 121.1 3.7 6.6 100 1.65 24 -31.1 145.8 26.2 5.9 -26.4 136.7 15.9 7.6 95 100 GPMDB 6459 A Magnetization. AF to 120mT, thermal to 550C, AF cleaning mostly used. IRM (sat. 0. 3T) , SEM (MAGN). Late Devonian mineralisation, prefolding magnetization. Passes McFadden and Jones test. LP-DC4 : DE-DI : LT-AF-Z : LT-T-Z This study >>>>>>>>>> tab delimited magic_methods magic_method_code method_type method_definition method_description method_iaga7 method_url_tauxe er_citation_names DE-DI Direction Estimation Pole latitude and longitude calculation from mean declination-inclination Ptype D Cox & Doell 1960 GM-FOSSIL Geochronology Method Age determined from fossil record LP-DC4 Lab Protocol Principal component analysis carried out from analysis of Zijderveld diagrams DC4 http://earthref.org/MAGIC/books/Tauxe/2005/lecture.16.htm#IAGA7 McElhinny & McFadden 2000 LT-AF-Z Lab Treatment Alternating field: In zero field A specimen is subject to a decaying and alternating magnetic field such that the magnetic moments with coercivities below the peak field are aligned in opposed directions, and thus cancel. Specimens are typically reoriented in three or more orthogonal axe. A http://earthref.org/MAGIC/books/Tauxe/2005/lecture.09.htm#LT-AFZ As & Zijderveld 1958 : Collinson 1983 LT-T-Z Lab Treatment Specimen cooling: In zero field Heating the specimen to the desired temperature step and then cooling in zero ambient magnetic field. T http://earthref.org/MAGIC/books/Tauxe/2005/lecture.09.htm#LT-TZ Wilson 1961 : Collinson 1983