000062024 001__ 62024
000062024 005__ 20221004075831.0
000062024 0247_ $$2doi$$a10.3389/feart.2017.00008
000062024 0248_ $$2sideral$$a101091
000062024 037__ $$aART-2017-101091
000062024 041__ $$aeng
000062024 100__ $$0(orcid)0000-0001-7771-6873$$aRamón, M.J.
000062024 245__ $$aVirtual directions in paleomagnetism: A global and rapid approach to evaluate the NRM components
000062024 260__ $$c2017
000062024 5060_ $$aAccess copy available to the general public$$fUnrestricted
000062024 5203_ $$aWe introduce a method and software to process demagnetization data for a rapid and integrative estimation of characteristic remanent magnetization (ChRM) components. The virtual directions (VIDI) of a paleomagnetic site are “all” possible directions that can be calculated from a given demagnetization routine of “n” steps (being m the number of specimens in the site). If the ChRM can be defined for a site, it will be represented in the VIDI set. Directions can be calculated for successive steps using principal component analysis, both anchored to the origin (resultant virtual directions RVD; m* (n2 +n)/2) and not anchored (difference virtual directions DVD; m* (n2 -n)/2). The number of directions per specimen (n2) is very large and will enhance all ChRM components with noisy regions where two components were fitted together (mixing their unblocking intervals). In the same way, resultant and difference virtual circles (RVC, DVC) are calculated. Virtual directions and circles are a global and objective approach to unravel different natural remanent magnetization (NRM) components for a paleomagnetic site without any assumption. To better constrain the stable components, some filters can be applied, such as establishing an upper boundary to the MAD, removing samples with anomalous intensities, or stating a minimum number of demagnetization steps (objective filters) or selecting a given unblocking interval (subjective but based on the expertise). On the other hand, the VPDprogramalso allows the application of standard approaches (classic PCA fitting of directions a circles) and other ancillary methods (stacking routine, linearity spectrum analysis) giving an objective, global and robust idea of the demagnetization structure with minimal assumptions. Application of the VIDI method to natural cases (outcrops in the Pyrenees and u-channel data from a Roman dam infill in northern Spain) and their comparison to other approaches (classic end-point, demagnetization circle analysis, stacking routine and linearity spectrum analysis) allows validation of this technique. The VIDI is a global approach and it is especially useful for large data sets and rapid estimation of the NRM components.
000062024 536__ $$9info:eu-repo/grantAgreement/ES/DGA/CTPP01-07$$9info:eu-repo/grantAgreement/ES/DGA/PI165-09$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2014-54118-C2
000062024 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000062024 592__ $$a1.248$$b2017
000062024 593__ $$aEarth and Planetary Sciences (miscellaneous)$$c2017$$dQ1
000062024 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000062024 700__ $$0(orcid)0000-0002-0504-2352$$aPueyo, E.L.$$uUniversidad de Zaragoza
000062024 700__ $$0(orcid)0000-0003-1563-6434$$aOliva-Urcia, B.
000062024 700__ $$0(orcid)0000-0001-6527-3972$$aLarrasoaña, J.C.$$uUniversidad de Zaragoza
000062024 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000062024 773__ $$g5 (2017), 8 [14 pp.]$$pFront. earth sci. (Lausanne)$$tFrontiers in Earth Science$$x2296-6463
000062024 8564_ $$s4485924$$uhttps://zaguan.unizar.es/record/62024/files/texto_completo.pdf$$yVersión publicada
000062024 8564_ $$s11553$$uhttps://zaguan.unizar.es/record/62024/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000062024 909CO $$ooai:zaguan.unizar.es:62024$$particulos$$pdriver
000062024 951__ $$a2022-10-03-13:16:09
000062024 980__ $$aARTICLE