Exhumation of the ultrahigh‐pressure continental crust in east central China: Cretaceous and Cenozoic unroofing and the Tan‐Lu fault

Ratschbacher, Lothar; Hacker, Bradley R.; Webb, Laura E.; McWilliams, Michael; Ireland, Trevor; Dong, Shuwen; Calvert, Andrew T.; Chateigner, Daniel; Wenk, Hans‐Rudolf

doi:10.1029/2000jb900040

Cited by 358 publications

(297 citation statements)

References 73 publications

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“…This result supports the observations in the Dabieshan area (e.g. Mattauer et al, 1991;Faure et al, 1999 andRatsbacher et al, 2000). Of course, this conclusion does not preclude that the Tan-Lu fault originated in Early Mesozoic times or even earlier in the tectonic evolution of eastern Asia with different kinematics.…”

Section: The Significance Of the Tan-lu Faultsupporting

confidence: 81%

“…The Tan-Lu Fault is a major but controversial structure in eastern China Mattauer et al, 1991;Yin and Nie, 1993;Zhu et al, 1995;Wang et al, 1996;Gilder et al, 1999 andRatsbacher et al, 2000 andenclosed references). Several tectonic models suggest displacements of several hundreds of kilometers along the fault with timing ranging from the Precambrian to Cenozoic (cf.…”

Section: The Significance Of the Tan-lu Faultmentioning

confidence: 99%

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Triassic polyphase deformation in the Feidong-Zhangbaling Massif (eastern China) and its place in the collision between the North China and South China blocks

Lin

Faure

Wang

et al. 2005

Journal of Asian Earth Sciences

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The Feidong-Zhangbaling Massif is located between the Dabieshan and Sulu areas along the Tan-Lu fault in eastern China. Five tectonic-metamorphic events are distinguished there. The earliest deformation (D1) corresponds to a southward compression that occurred during subduction of the South China Block below the North China Block. Top-to-the-south shearing is coeval with Late Permian-Early Triassic blueschist facies metamorphism, and possibly with the development of south-verging recumbent folds in the Neoproterozoic-Paleozoic sedimentary cover of the South China foreland. The main ductile deformation (D2) is an extensional one, characterized by top-to-the-north shearing, coeval with the early stage of exhumation of the high-pressure rocks. A top-to-the-NW ductile shearing, and microfolds overturned to the northwest, belong to a second deformational phase of exhumation (D3) which is distinct from the main event (D2). Previous 40 Ar-39 Ar mica dates ranging between 245 and 212 Ma suggest Late Permian-Early Triassic ages for the D1 to D3 events. The D4 event produced NE-SW trending folds in the sedimentary cover interpreted as gravity collapse structures. A Late Cretaceous brittle extensional event (D5) controls the opening and infill of continental half-grabens. In the study area, the Tan-Lu fault is a Cretaceous brittle normal fault. The lack of ductile deformation presented along the Tan-Lu fault suggests that it did not play a significant role in the exhumation of high-pressure metamorphic rocks.

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Section: The Significance Of the Tan-lu Faultsupporting

confidence: 81%

Section: The Significance Of the Tan-lu Faultmentioning

confidence: 99%

Triassic polyphase deformation in the Feidong-Zhangbaling Massif (eastern China) and its place in the collision between the North China and South China blocks

Lin

Faure

Wang

et al. 2005

Journal of Asian Earth Sciences

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“…Furthermore, the continental crystalline crust along the rifted margin is also at risk of being recycled. The presence of high-grade, eclogitic rocks in many orogenic belts indicates that some crust is underthrust to great depths (>80 km) and while some of this is returned to the surface some may also be lost (de Sigoyer et al, 2000;Leech and Stockli, 2000;Ratschbacher et al, 2000;Treloar et al, 2003).…”

Section: Subduction Of Continental Crustmentioning

confidence: 99%

Crustal redistribution, crust–mantle recycling and Phanerozoic evolution of the continental crust

Clift

Vannucchi

Morgan

2009

Earth-Science Reviews

190

151

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“…The Late Triassic-Middle Jurassic foreland basin was developed along the Dangyang-Daye area, and was involved in deformation at the later stage (J 3 -K 1 ) with a southern frontal thrust fault [28] (Figure 2(a)). The Xiangfan-Guangji fault, as a main controlling fault in the NYFB, developed as a thrust during collision [14,25,26], and acted as a sinistral transtensional fault during Cretaceous exhumation of the HP rocks [29]. Field observations indicate that at an earlier stage this fault behaved as a south-directed flat thrust and tight fold of Cambrian-Silurian strata which were overlapped by HP metamorphic rocks.…”

Section: Northern Yangtze Fold and Thrust Belt (Nyfb)mentioning

confidence: 97%

“…Superimposed across the entire orogen during the post-collisional deformation stage, are a series of isolated extensional basins that overlie shortened basement, and the shearing zones and normal faults in the orogen-core and margins in the latest Jurassic (? )-Early Cretaceous, or even later time (Figure 2(a)) [14,29,35]. [11,30,55].…”

Section: Axial Dabie Structural Beltmentioning

confidence: 99%

Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

Liu

Zhang

2012

Chin. Sci. Bull.

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The Dabie orogen underwent deep continental subduction, rapid exhumation, and the huge amount of erosion during the Mesozoic. Its tectonic evolution, especially how its evolution was recorded by sedimentary basins at the flanks of the Dabie orogen is one of the most important issues of the world's attention. These years, newly studies of basin sedimentology, combined with structural geology, have shown a fundamental progress. The overall distribution of different basin types in the orogen indicates that shortening and thrusting at the margins of the orogen from the Late Triassic to the Early Cretaceous controlled the foreland basins, and extension, doming and rifting were initiated in the core of the orogen from the Jurassic to the Early Cretaceous and were expanded to the whole orogen after the Late Cretaceous. Therefore, The Dabie orogen records gradual transition from overall shortening and thrusting to dominantly extension and rift basin formation expanded from its core to its margins, although these shortening and extension overlapped in time from the Jurassic through Early Cretaceous at crustal levels. The unroofing ages of the ultra-high pressure (UHP) metamorphic rocks in the Dabie orogen change from Early Jurassic to Late Jurassic westward. The depth of exhumation increases eastwards. The sediment sources for the Hefei basin are mostly composed of the deeply exhumed, axial Dabie metamorphic complex, and the sediment sources for the Middle Yangtze basin are mostly from cover strata in the southern orogen and related strata with subjacent (i.e. subsequently overthrusted) Mianlue suture belt. Geodynamic analysis represents that continental collision between the North China Block and the South China Block along the Shangdan and Mianlue sutures, subsequently northwestward progradation of the Jiangnan fold and thrust belt, and the underthrusting of the North China Block along the Northern Boundary Fault of Qinling Range led to crustal thickening, gravitational spreading and balanced rebound of the resultant thick crustal welt, and multi-episodic exhumation of the HP/UHP metamorphic rocks. The future studies by the methods of tracing the Dabie orogeny through deposition in the marginal basins should focus on eastward extension of the Mianlue suture, thrust and overlap of the Dabie HP/UHP metamorphic block on different lithotectonic zones and basins along the northern South China Block, the structural framework of the source area of the basins in the syn-depositional stage, the basin lateral extension, huge amount of erosion and sediment transportation from the Dabie blanket and basement rocks, and recovery of subducted and removed structural units within the Dabie orogen, etc.Dabie orogen, sedimentary basin, evolution of basin/mountain system, HP/UHP metamorphic rocks, provenance analysis, exhumation process, depositional paleogeography

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Exhumation of the ultrahigh‐pressure continental crust in east central China: Cretaceous and Cenozoic unroofing and the Tan‐Lu fault

Cited by 358 publications

References 73 publications

Triassic polyphase deformation in the Feidong-Zhangbaling Massif (eastern China) and its place in the collision between the North China and South China blocks

Triassic polyphase deformation in the Feidong-Zhangbaling Massif (eastern China) and its place in the collision between the North China and South China blocks

Crustal redistribution, crust–mantle recycling and Phanerozoic evolution of the continental crust

Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

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