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- W2978162798 abstract "Whether NE China and its adjacent areas underwent disturbance of a large-scale of strike-slip movement and led to crustal extrusion and thickening in the Mesozoic similar to Qinghai-Xizang plateau in the Cenozoic is an important issue both on crustal evolution of the areas and on post-collisional evolution of the collisional belt. Based on available geological data, the structural deformation since the Mesozoic in the northern Great Khing'an range may be divided into four episodes as follows: (1) southwards thrusting movement possibly in the end of the Jurassic; (2) sinistral strike-slip ductile shearing movement parallel to the Mongol-Okhotsk orogenic belt; (3) southeastwards brittle thrusting movement cutting off above structural and Mongol-Okhotsk belts; and (4) occurrence of NNE-extended normal faults in the Cenozoic. The first two periods of structural deformation are supposed to be related to the orogenic processes of Mongol-Okhotsk belt; the third one was response of the subduction of Paleo-Pacific (Kula-Pacific) plate under the Eurasia; and the youngest one was the result of subduction of the Pacific plate based on their spatial-temporal and kinematic features. Ar-Ar dating to syn-tectonic biotites from the second period of structural deformation belt yields spectrum and isochron ages of 127~130 Ma, implying that the peak timing of this period of tectonothermal event and crustal extrusion and thickening in NE China and its adjacent areas is in the beginning of the Cretaceous. The synthesis of available geological data indicates that the crustal tectonic evolution of NE China and adjacent areas since the Mesozoic may be reconstructed as four stages: (1) Triassic compression and extension originated from collision of Siberian and Sino-Korean continents and contracting evolution of Kanggai-Kente and Paleo-Pacific oceans; (2) rotation, strike-slipping, and thrusting of blocks, crustal thickening and extrusion from the Jurassic to the beginning of the Cretaceous following the closure of the Kanggai-Kente ocean and subduction of Paleo-Pacific oceanic plate under the Eurasia;(3)extension and thinning of the lithosphere and magmatic activities from the Cretaceous to the Paleocene due to subduction of Paleo-Pacific oceanic plate under the Eurasia; and (4) crustal disintegration and rifting associated with the subduction of the Pacific plate under the Eurasia since the Eocene." @default.
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- W2978162798 date "2004-01-01" @default.
- W2978162798 modified "2023-09-25" @default.
- W2978162798 title "The timing of crustal sinistral strike-slip movementin the northern Great Khing'an ranges and its constrainton reconstruction of the crustal tectonic evolution ofNE China and adjacent areas since the Mesozoic" @default.
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