000099770 001__ 99770
000099770 005__ 20230519145508.0
000099770 0247_ $$2doi$$a10.1093/gji/ggaa517
000099770 0248_ $$2sideral$$a123247
000099770 037__ $$aART-2021-123247
000099770 041__ $$aeng
000099770 100__ $$aPeng, H.
000099770 245__ $$aLithospheric dynamics in the vicinity of the Tengchong volcanic field (southeastern margin of Tibet): An investigation using P receiver functions
000099770 260__ $$c2021
000099770 5060_ $$aAccess copy available to the general public$$fUnrestricted
000099770 5203_ $$aTengchong volcanic field (TVF) in the northern Indochina block lies in a critical area for understanding complex regional dynamics associated with continent-continent convergence between the Indian and Eurasian plates, including northeastward compression generated by subduction of the Indian Plate beneath the Burma Arc, and southeastward lateral extrusion of the crust from below central Tibet. We gathered 3408 pairs of P receiver functions with different frequencies and calculated the splitting parameters of the Moho-converted Pms phase. An anisotropic H-¿ stacking algorithm was used to determine crustal thickness and Vp/Vs ratios. We also inverted for the detailed S-velocity structure of the crust and upper mantle using a two-step inversion technique. Finally, we mapped the topography of the lithosphere-asthenosphere boundary. Results show fast-wave polarization directions with a dominant NE-SW orientation and delay times varying between 0.19 and 1.22 s, with a mean of 0.48 ± 0.07 s. The crustal Vp/Vs ratio varies from 1.68 to 1.90 and shows a maximum value below the central part of the TVF, where there is relatively thin crust (~35-39 km) and a pronounced low-velocity anomaly in the middle-lower crust. The depth of the lithosphere-asthenosphere boundary ranges from 53 to 85 km: it is relatively deep (~70-85 km) in the vicinity of the TVF and relatively shallow in the south of the study area. In the absence of low shear wave velocity in the upper mantle below the TVF, we propose that the low-velocity anomaly in the lower crust beneath the TVF derives from the upper mantle below the neighbouring Baoshan block.
000099770 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000099770 590__ $$a3.352$$b2021
000099770 592__ $$a1.389$$b2021
000099770 594__ $$a5.7$$b2021
000099770 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b35 / 87 = 0.402$$c2021$$dQ2$$eT2
000099770 593__ $$aGeophysics$$c2021$$dQ1
000099770 593__ $$aGeochemistry and Petrology$$c2021$$dQ1
000099770 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000099770 700__ $$0(orcid)0000-0002-3424-7744$$aBadal, J.$$uUniversidad de Zaragoza
000099770 700__ $$aHu, J.
000099770 700__ $$aYang, H.
000099770 700__ $$aLiu, B.
000099770 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica
000099770 773__ $$g224, 2 (2021), 1326-1343$$pGeophys. j. int.$$tGEOPHYSICAL JOURNAL INTERNATIONAL$$x0956-540X
000099770 8564_ $$s875521$$uhttps://zaguan.unizar.es/record/99770/files/texto_completo.pdf$$yVersión publicada
000099770 8564_ $$s2969645$$uhttps://zaguan.unizar.es/record/99770/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000099770 909CO $$ooai:zaguan.unizar.es:99770$$particulos$$pdriver
000099770 951__ $$a2023-05-18-15:08:50
000099770 980__ $$aARTICLE