Kinematics of the Tengchong Terrane in SE Tibet from the late Eocene to early Miocene: Insights from coeval mid-crustal detachments and strike-slip shear zones

New insights into the Cenozoic lateral extrusion of crustal blocks on the southeastern edge of Tibetan Plateau: Evidence from paleomagnetic results from Paleogene sedimentary strata of the Baoshan Terrane

“…The intense crustal deformation and uplifting of the southeastern edge of Tibet resulted in folding of the Paleogene strata and lack of the Miocene strata in the SMT and BST, indicating the folding time of Paleogene strata should be no earlier than Oligocene. In addition, abundant Pliocene lacustrine strata with interbedded lignite beds and alkali basalts were formed along strike‐slip faults in the BST [ BGMRY , 1993; Wang and Burchfiel , ; Wang et al ., ; Xu et al ., ]. It can be observed in the field that the bedding dips of the Eocene‐Oligocene and Paleocene strata are generally steep (Figure b); however, the Pliocene alkali basalts and sedimentary strata kept approximately horizontal and did not undergo tectonic deformation in the central part of the BST.…”

“…The negative fold tests indicate that both the MTC and HTC are postfolding remagnetizations. As the neighboring region of the Tibetan Plateau, the BST, Tengchong Terrane (TCT), and ICB were affected by continuous northward compression between the India and Eurasia in the Cenozoic [ Wang and Burchfiel , ; Chung et al ., ; Wang et al ., ; Xu et al ., ]. The intense crustal deformation and uplifting of the southeastern edge of Tibet resulted in folding of the Paleogene strata and lack of the Miocene strata in the SMT and BST, indicating the folding time of Paleogene strata should be no earlier than Oligocene.…”

Magma-derived CO 2 emissions in the Tengchong volcanic field, SE Tibet: Implications for deep carbon cycle at intra-continent subduction zone

“…1a). Cenozoic tectonic movement in response to the India-Asia continent collision and uplift of the Tibetan Plateau led to formation of a strike-slip fault system in the Tengchong block (e.g., Tapponnier et al, 2001;Wang et al, 2008;Xu et al, 2015), such as the Binlangjiang fault, Dayingjiang fault and Longchuanjiang fault (Fig. 1b;Jiang and Huangfu, 2000).…”

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

“…(a) Simplified tectonic map of the Tethyan system in the east Cimmerides and west Cathaysides and the locations of the Lhasa terrane and Tengchong terrane (after Xu et al, ). (b) Simplified regional geologic map of the Tengchong area that shows the distribution of the Late Cretaceous to Eocene igneous rocks and tin polymetallic deposits (after Cao, Zhang et al, , Cao, Zou et al, ).…”

“…Two large-scale tin deposits (the Xiaolonghe and Lailishan deposits) and a series of medium-to small-scale tin deposits have been discovered in the Tengchong terrane. Three stages of Sn mineralization are identified as follows: (a) Early Cretaceous (120 ± 5 Ma, e.g., the Tieyaoshan, Diantan, and Jiaojiguan deposits; Cao et al, 2014;Chen et al, 2014), (b) Late Cretaceous (70 ± 5 Ma, e.g., the Xiaolonghe and Xinqi deposits; Jiang, Yu, & Lu, 2004;Cao et al, 2016), and (c) Eocene (50 ± 5 Ma, e.g., the Lailishan deposit; Chen et al, 2014) Xu et al, 2015). (b) Simplified regional geologic map of the Tengchong area that shows the distribution of the Late Cretaceous to Eocene igneous rocks and tin polymetallic deposits (after , Cao, Zou et al, 2016.…”