Late Paleozoic tectono–metamorphic evolution of the Altai segment of the Central Asian Orogenic Belt: Constraints from metamorphic P–T pseudosection and zircon U–Pb dating of ultra-high-temperature granulite

Petrogenesis and tectonic setting of the Middle Permian A‐type granites in Altay, northwestern China: Evidences from geochronological, geochemical, and Hf isotopic studies

“…The geodynamic setting of the Chinese Altay in the Permian is debated, including the activity of mantle plumes (Tong, Xu et al, ; Yang et al, ; Zhang, Zou et al, ; Zhang et al, ), slab break‐off (Li, Yang et al, ), postcollisional extension (Tong, Wang et al, ; Wang, Jahn, et al, ; Wei et al, ), or a large‐scale strike‐slip shearing fault (Laurent‐Charvet, Monié, Charvet, Shu, & Shi, ). Mantle plume model: The coeval (275–270 Ma) voluminous, variably sourced mafic rocks in the Tarim and the mafic intrusions and voluminous A‐type granites in Tianshan and Altay (see Zhang et al, ; Figure ) constitute a Permian large igneous province in NW China.…”

“…The Chinese Altay orogenic belt is situated between the southern margin of the Siberian Block and the northern margin of the Kazakhstan–Junggar Block, bounded to the northwest by the Rudny Altay of Kazakhstan and the Gorny Altay of Russia, to the southeast by Gobi Altay of Mongolia, and separated from the Junggar Basin by the Erqis Fault (Li, Yang, Li, Santosh, Chen, & Xiao, ; Xiao & Santosh, ; Zhang, Chen, Zheng, Qin, & Li, ; Zheng et al, ). Northwest (NW)‐trending faults are widely developed in the Chinese Altay orogen, such as the Hongshanzui Fault, Abagong Fault, Tesibahan Fault, and Erqis Fault.…”

“…The geodynamic setting of the Chinese Altay in the Permian is debated, including the activity of mantle plumes (Tong, Xu et al, 2014a;Yang et al, 2015;Zhang, Zou et al, 2014a;Zhang et al, FIGURE 10 Hf isotopic diagram of the Jiangjunshan and Dakalasu pluton (Li, Yang et al, 2014b), postcollisional extension (Tong, Wang et al, 2014;Wang, Jahn, et al, 2014a;Wei et al, 2007), or a large-scale strike-slip shearing fault (Laurent-Charvet, Monié, Charvet, Shu, & Shi, 2003). China.…”

“…These results can be used to constrain their possible emplacement ages, source, and petrogenesis and thus provide important insights into understanding the postcollisional extensional environment of the Chinese Altay orogeny. 2 | REGIONAL GEOLOGY The Chinese Altay orogenic belt is situated between the southern margin of the Siberian Block and the northern margin of the Kazakhstan-Junggar Block, bounded to the northwest by the Rudny Altay of Kazakhstan and the Gorny Altay of Russia, to the southeast by Gobi Altay of Mongolia, and separated from the Junggar Basin by the Erqis Fault (Li, Yang, Li, Santosh, Chen, & Xiao, 2014b;Xiao & Santosh, 2014;Zhang, Chen, Zheng, Qin, & Li, 2014b;Zheng et al, 2014).…”

Permian large igneous provinces: Characteristics, mineralization and paleo-environment effects

“…290 Ma) zircons from the Keping basalts are generally lower than those of the host basalts (−2.8 to +2.1), and distinctly different from that of intrusions (− 0.3 to + 7.1) and the zircons from the intrusions (+ 4.9 to +8.8) elsewhere in the Tarim LIP. These zircons are interpreted as the xenocrysts from the in situ sedimentary rocks due to crustal contamination and may be originally derived from unrevealed igneous plutons in the Tarim LIP or other coeval plutons in adjacent regions (Li et al, 2014b).…”