000151687 001__ 151687
000151687 005__ 20250319155218.0
000151687 0247_ $$2doi$$a10.1016/j.tecto.2021.228874
000151687 0248_ $$2sideral$$a126240
000151687 037__ $$aART-2021-126240
000151687 041__ $$aeng
000151687 100__ $$aLin J.
000151687 245__ $$aCrustal velocity structure of Cathaysia Block from an active-source seismic profile between Wanzai and Hui''an in SE China
000151687 260__ $$c2021
000151687 5060_ $$aAccess copy available to the general public$$fUnrestricted
000151687 5203_ $$aWith the purpose of exploring the widely distributed Mesozoic granitoids in SE China and the related mineralization, we carried out a new 530-km-long seismic wide-angle reflection and refraction (WARR) profile along the transect Wanzai- Hui''an. Based on a previous exploration in 2012 and the analysis of this WARR profile, we have deduced a detailed P-wave velocity model of the crust and uppermost mantle. The main results are: (1) The crustal thickness is about 30 to 32 km beneath the Yangtze Block and West Cathaysia, and 29 to 30 km below the East Cathaysia, which represents a significant thinning with respect to the worldwide average thickness of shields and platforms. (2) The variation in seismic velocity between the upper crust and middle-lower crust in the Yangtze Block and the Cathaysia Blocks indicates that the Shaoxing-Jiangshan-Pingxiang Fault (SJPF) is the tectonic boundary between the Yangtze and Cathaysia and the Zhenghe-Dapu Fault (ZDF) is the tectonic boundary between the west and east Cathaysia. (3) The middle crust exhibits a low P-wave velocity layer of 6.2 km/s below the Wuyishan Metallogenic Belt (WMB). This low velocity layer can be attributed to the delamination during the Caledonian orogeny and the Yanshanian extension. (4) The middle-lower crust shows a clear lateral velocity variation from west to east in Cathaysia. The subduction of the Paleo-Pacific plate is believed to be the main reason for the extensional tectonic environment and magmatism during the Yanshanian (Jurassic-Cretaceous) period, leading to significant crustal and lithospheric thinning. Relatively high velocity in the middle-lower crust and widely disseminated Cretaceous volcanic rocks in East Cathaysia may be related to the slab rollback of the Paleo-Pacific plate in the late Yanshanian (Cretaceous) period.
000151687 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000151687 590__ $$a3.66$$b2021
000151687 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b32 / 87 = 0.368$$c2021$$dQ2$$eT2
000151687 592__ $$a1.545$$b2021
000151687 593__ $$aGeophysics$$c2021$$dQ1
000151687 593__ $$aEarth-Surface Processes$$c2021$$dQ1
000151687 594__ $$a7.1$$b2021
000151687 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000151687 700__ $$aXu T.
000151687 700__ $$aCai H.
000151687 700__ $$aLü Q.
000151687 700__ $$aBai Z.
000151687 700__ $$aDeng Y.
000151687 700__ $$aZhang Y.
000151687 700__ $$aHuang M.
000151687 700__ $$0(orcid)0000-0002-3424-7744$$aBadal, José$$uUniversidad de Zaragoza
000151687 700__ $$aJin X.
000151687 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica
000151687 773__ $$g811 (2021), 228874 [12 pp]$$pTectonophysics$$tTectonophysics$$x0040-1951
000151687 8564_ $$s4040539$$uhttps://zaguan.unizar.es/record/151687/files/texto_completo.pdf$$yPostprint
000151687 8564_ $$s1716727$$uhttps://zaguan.unizar.es/record/151687/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000151687 909CO $$ooai:zaguan.unizar.es:151687$$particulos$$pdriver
000151687 951__ $$a2025-03-19-14:20:48
000151687 980__ $$aARTICLE