Tectonic evolution of the Tancheng-Lujiang (Tan-Lu) fault via Middle Triassic to Early Cenozoic paleomagnetic data

	Tectonic evolution of the Tancheng-Lujiang (Tan-Lu) fault via Middle Triassic to Early Cenozoic paleomagnetic data
	Gilder, SA ; Leloup, PH ; Courtillot, V ; Chen, Y ; Coe, RS ; Zhao, XX ; Xiao, WJ ; Halim, N ; Cogne, JP ; Zhu, RX
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	1999-07-10
卷号	104 期号:B7 页码:15365-15390
ISSN号	2169-9313
文献子类	Article
英文摘要	The north-striking Tancheng-Lujiang (Tan-Lu) fault is a conspicuous and controversial feature of the eastern Asian landscape. Near the southeast extremity of the fault in Anhui Province, we collected paleomagnetic samples at 17 Middle Triassic (T2) and 10 Upper Cretaceous (K2) to lower Cenozoic (E1) sites. T2 remanent magnetizations are interpreted as primary in two of three areas. The three areas are rotated 37 degrees to 137 degrees counterclockwise with respect to the South China Block (SCB) reference direction. K2-E1 remanent magnetization directions pass regional fold and reversals tests and are not rotated with respect to surrounding areas. Counterclockwise rotation of T2 strata therefore ended before K2 and is attributed to left lateral shear acting along Tan-Lu during the North China Block (NCB)-SCB collision. In Shandong Province, 700 km north of the Anhui sites, four areas containing 33 Upper Jurassic (53) and Cretaceous sites have negligible declination differences, except for one which has dispersed directions. The fold test is inconclusive for this latter area and positive for the other three. Regional concordance of the J3-E1 paleomagnetic data (including paleolatitudes) together with observed deformation patterns suggest that an extensional regime prevailed in the Late Cretaceous and Cenozoic. Euler pole positions that constrain the North-South China collision and account for Tan-Lu motion suggest at least 500 km of sinistral shear took place along the fault, and either (1) subduction and related ultrahigh pressure (UHP) metamorphism occurred near the present location of the Qinling-Dabieshan and Sulu UHP belts while Tan-Lu acted as a transform fault that connected the two subduction zones, or (2) Tan-Lu and Sulu were parts of the same transform fault system and no UHP rocks formed in situ at Sulu. In either case, UHP rocks originally exhumed near Dabieshan could have been transported by plate capture toward Sulu along Tan-Lu, After North and South China impacted near Dabieshan, the Tan-Lu fault grew within the SCB as the Dabieshan corner indented the SCB, causing folds in SCB cover rocks to conform to the NCB margin. Late Cretaceous to Cenozoic reactivation of Tan-Lu, with both right lateral strike-slip and normal fault motion, occurred as the SCB extruded east relative to the NCB under the influence of the India-Asia collision.
WOS关键词	ULTRAHIGH-PRESSURE METAMORPHISM ; COESITE-BEARING ECLOGITES ; EASTERN HEBEI PROVINCE ; SOUTH CHINA COLLISION ; NORTH CHINA ; DABIE-SHAN ; EXTRUSION TECTONICS ; NORTHEASTERN CHINA ; CRUSTAL EVOLUTION ; CONTINENTAL-CRUST
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000081378800026
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/75444]
专题	中国科学院地质与地球物理研究所
通讯作者	Gilder, SA
作者单位	1.Inst Phys Globe, Lab Paleomagnetisme & Geodynam, F-75252 Paris 05, France 2.Inst Phys Globe, Lab Tecton, F-75252 Paris 05, France 3.Univ Orleans, Dept Sci Terre, F-45067 Orleans 02, France 4.Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA 5.Chinese Acad Sci, Inst Geol, Lab Lithosphere Tecton Evolut, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Gilder, SA,Leloup, PH,Courtillot, V,et al. Tectonic evolution of the Tancheng-Lujiang (Tan-Lu) fault via Middle Triassic to Early Cenozoic paleomagnetic data[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,1999,104(B7):15365-15390.
APA	Gilder, SA.,Leloup, PH.,Courtillot, V.,Chen, Y.,Coe, RS.,...&Zhu, RX.(1999).Tectonic evolution of the Tancheng-Lujiang (Tan-Lu) fault via Middle Triassic to Early Cenozoic paleomagnetic data.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,104(B7),15365-15390.
MLA	Gilder, SA,et al."Tectonic evolution of the Tancheng-Lujiang (Tan-Lu) fault via Middle Triassic to Early Cenozoic paleomagnetic data".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 104.B7(1999):15365-15390.