40Ar/39Ar dating of strike-slip motion on the Tan–Lu fault zone, East China

Zhu, Guang; Wang, Yongsheng; Liu, Guosheng; Niu, Manlan; Xie, Chao-Ming; Changcheng, LI

doi:10.1016/j.jsg.2005.04.007

Cited by 252 publications

(133 citation statements)

References 33 publications

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“…The TLFZ is dominated by a series of sinistral ductile shear belts of Early Cretaceous age (Zhu et al 2005). Recently, we identified an older phase of formation of NE-NNE sinistral ductile shear belts along the eastern margin of the DOB and western margin of the SOB.…”

Section: Syn-collisional Ductile Shear Beltsmentioning

confidence: 93%

“…1) and is dominated by a series of NEstriking, sinistral ductile shear belts that have yielded Early Cretaceous ages (Zhu et al 2005). Normal faults related to the development of the Qianshan Basin truncate the eastern edge of the ductile shear zone Grimmer et al 2002, Fig.…”

Section: Structuresmentioning

confidence: 99%

“…On the basis of seismic interpretation and drill-hole data (Jia et al 2001), the Lower to Middle Jurassic strata show depocenters near the DOB and Zhangbaling uplift belt (Fig. 6b, c), a part of the TLFZ in which metamorphic rocks involved in the Tan-Lu sinistral faulting (Zhu et al 2005) are exposed. Therefore, deposition of the foreland strata in the Hefei basin was not only controlled by the uplift of the DOB, but also influenced by the Zhangbaling uplift belt east of the basin.…”

Section: Constraints From Foreland Depositsmentioning

confidence: 99%

“…240-230) and subsequent exhumation lasted to the Middle Jurassic (Li et al 1993Ames et al 1996;Rowley et al 1997;Hacker et al 2000;Liu and Xu 2004). Structural and geochronological studies (Xu et al 1987;Zhu et al 2005) demonstrated that the TLFZ experienced sinistral motion in the earliest Early Cretaceous. It then became a normal fault in response to regional lithospheric thinning from Cretaceous to Paleogene Grimmer et al 2002;Ren et al 2002;Wu et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Syn-collisional transform faulting of the Tan-Lu fault zone, East China

Zhu

Liu

Niu

et al. 2007

Int J Earth Sci (Geol Rundsch)

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172

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Origin of the continental-scale Tan-Lu fault zone (TLFZ), East China, remains controversial. About 550 km sinistral offset of the Dabie orogenic belt (DOB) and Sulu orogenic belt (SOB) is shown along the NE-NNEstriking TLFZ. Syn-collisional, sinistral ductile shear belts in the TLFZ have been identified. Thirteen phengite bulk separates from the mylonites were dated by the 40 Ar/ 39 Ar method. They gave cooling ages of the 198-181 Ma for the shear belts along the eastern margin of the DOB and 221-210 Ma from the western margin of the SOB. Distribution of the foreland basin deposits suggests that sinistral offset of the DOB and SOB by the TLFZ took place prior to deposition of the Upper Triassic strata. The marginal structures around the DOB and SOB support syn-collisional faulting, and indicate anticlockwise rotation of the DOB during the displacement. The folding and thrust faulting related to crustal subduction, coeval with the TanLu faulting, is older than the foreland basin deposition related to the orogenic exhumation. Several lines of evidence demonstrate that the TLFZ was developed as a syncollisional transform fault during latest Middle to earliest Late Triassic time when the DOB and SOB experienced crustal subduction of the South China Block (SCB). Eastward increase of the crustal subduction rates is believed to be responsible for the sinistral transform faulting.

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Section: Syn-collisional Ductile Shear Beltsmentioning

confidence: 93%

Section: Structuresmentioning

confidence: 99%

Section: Constraints From Foreland Depositsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Syn-collisional transform faulting of the Tan-Lu fault zone, East China

Zhu

Liu

Niu

et al. 2007

Int J Earth Sci (Geol Rundsch)

Self Cite

172

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“…Previous studies suggested that the total offset along the Tan-Lu fault was more than 550 km (Zhu et al 2005) or even 1000-1500 km (Xu et al 1987) from the Triassic to the present day. We estimate the displacement of the Shandong Peninsula since the Cretaceous at about 100-200 km.…”

Section: Ridge Subduction Along the Lower Yangtze Rivermentioning

confidence: 98%

Destruction of the North China Craton Induced by Ridge Subductions

Ling

Li²,

Ding

et al. 2013

The Journal of Geology

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A B S T R A C TThe destruction of the North China Craton (NCC) mainly occurred in the Cretaceous and has been attributed to a "top-down" rapid delamination, "bottom-up" long-term thermal/chemical erosions, or hydration by subductionreleased fluids. On the basis of the distribution of one Jurassic and two Early Cretaceous adakite belts and the drifting history of the paleo-Pacific Plate, we propose that three ridge subduction events dominated the large-scale decratonization in the NCC. Both physical erosion and magmatism induced by ridge subduction contributed to the destruction of the NCC; the last ridge subduction, at Ma, was the key driving force in the final destruction. We present 130 ‫ע‬ 5 mineralogical, geochemical, and isotopic data in support of the ridge subduction model: flat subduction of a spreading ridge resulted in stronger physical erosion on the thick lithosphere mantle of the NCC. Consequently, slab melting occurred during ridge subduction, forming adakites with mantle Mg isotope compositions, followed by A-type granites as a result of asthenosphere upwelling. Delaminated lower continental crust was also partially melted after reacting with hydrous magmas, as indicated by eclogite xenoliths, resulting in a zircon age spectrum similar to that of the NCC and some adakitic samples with chemical characteristics similar to those of the Dabie adakites. The final decratonization was triggered by the last ridge subduction, with both physical erosion (flat subduction) and thermal erosion (adakitic and A-type magmatisms). Given that ridge subduction has occurred throughout Earth's history, the associated decratonization processes are presumably a common phenomenon that modified the chemical compositions of the continental crust.

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How did the Dabie Orogen collapse? Insights from 3‐D magnetotelluric imaging of profile data

Zhang

Griffin

et al. 2016

JGR Solid Earth

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The Dabie Orogen is a key part of the Central Orogen of China and is well known because of its exposures to high‐ and ultrahigh‐pressure metamorphic rocks. It has been proposed to have formed by continent‐continent collision between the Yangtze and North China blocks in the Middle‐to‐Late Triassic and to have collapsed in the middle of the Early Cretaceous. However, there are few signatures in the lithospheric architecture that might constrain the scale of the orogenic collapse; as a result there has been a long‐term debate on its origin. A 300 km long broadband magnetotelluric transect perpendicular to a major collapsed structure has been completed to find some possible clues to the mechanisms of the orogenic collapse. The inverted resistivity cross section from 3‐D inversion of magnetotelluric profile data refines the postcollision lithospheric structure and in particular identifies domains of refertilized and depleted lithospheric mantle and isolated midcrustal low‐velocity and high‐conductivity zones. A correlation between voluminous surface magmatism in the Early Cretaceous and deep refertilized lithospheric mantle is illuminated by elevated electrical conductivity. We suggest that the lowermost crust was removed by delamination beneath the eastern Dabie during the orogenic collapse, while beneath the Tongbai‐Xinyang Terrain residual cratonic crust is underlain by depleted lithospheric mantle with relatively high resistivity. The isolated low‐velocity and high‐conductivity zones in the middle crust have been ascribed to shear‐promoted graphitic films which were destroyed by local granitic intrusions around 134 to 125 Ma. This lithospheric process can be attributed to far‐field effects, such as refertilization in the lower lithospheric mantle, promoted by upwelling of the asthenosphere and related fluids, during Paleo‐Pacific subduction beneath the Euro‐Asian continent.

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40Ar/39Ar dating of strike-slip motion on the Tan–Lu fault zone, East China

Cited by 252 publications

References 33 publications

Syn-collisional transform faulting of the Tan-Lu fault zone, East China

Syn-collisional transform faulting of the Tan-Lu fault zone, East China

Destruction of the North China Craton Induced by Ridge Subductions

How did the Dabie Orogen collapse? Insights from 3‐D magnetotelluric imaging of profile data

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