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Qilian Mountains
Late Quaternary slip rate of the Aksay segment and its rapidly decreasing gradient along the Altyn Tagh fault
Early Neoproterozoic magmatism in the Central Qilian block, NW China: Geochronological and petrogenetic constraints for Rodinia assembly
Structural anatomy of the early Paleozoic Laohushan ophiolite and subduction complex: Implications for accretionary tectonics of the Proto-Tethyan North Qilian orogenic belt, northeastern Tibet
The 2016 M w 5.9 Menyuan Earthquake in the Qilian Orogen, China: A Potentially Delayed Depth‐Segmented Rupture Following from the 1986 M w 6.0 Menyuan Earthquake
A restudy of the Sandbian to Katian (Upper Ordovician) graptolites from the East Qilianshan (Chilianshan), Northwest China
Petrography and geochemistry of the Lower Silurian sandstones from the Angzanggou Formation in the North Qilian Belt, China: implications for provenance, weathering and tectonic setting
Exploration of permafrost with audiomagnetotelluric data for gas hydrates in the Juhugeng Mine of the Qilian Mountains, China
Sedimentary evolution of the foreland basin in the NE Tibetan Plateau and the growth of the Qilian Shan since 7 Ma
Mesozoic-Cenozoic evolution of the Eastern Kunlun Range, central Tibet, and implications for basin evolution during the Indo-Asian collision
New insights into the Precambrian tectonic evolution and continental affinity of the Qilian block: Evidence from geochronology and geochemistry of metasupracrustal rocks in the North Wulan terrane
Petrogenesis and tectonic significance of Early Paleozoic magmatism in the northern margin of the Qilian block, northeastern Tibetan Plateau
Mid-Miocene uplift of the northern Qilian Shan as a result of the northward growth of the northern Tibetan Plateau
Abstract The Ti-in-zircon thermometer has been widely applied to different high-grade metamorphism rocks owing to its simplicity. Based on the calibration of Ferry & Watson (2007 ; New thermodynamic models and revised calibrations for the Ti-in-zircon and Zr-in-rutile thermometers. Contributions to Mineralogy and Petrology , 154 , 429–437), we used the Ti-in-zircon thermometer to estimate the metamorphic temperatures for low-temperature eclogites of North Qilian and Western Tianshan, China, and compiled HP/UHP eclogites from the literature. The Ti-in-zircon temperatures are generally higher than the estimations by other thermometers, especially when metamorphic temperatures are lower than 650°C. Although temperature exerts the dominant control on Ti content in zircon, other factors (e.g. lattice defect, other trace element substitutions in zircon, disequilibrium zircon growth, and precipitation from metamorphic fluids) may have contributed to the overestimated Ti-in-zircon temperatures.
Two contrasting accretion v. collision orogenies: insights from Early Paleozoic polyphase metamorphism in the Altun–Qilian–North Qaidam orogenic system, NW China
Abstract The Altun–Qilian–North Qaidam (AQQ) orogenic system in northern Tibet is considered to be the northernmost orogenic collage of the Prototethyan domain. It is regarded as resulting from collisions between various continental terranes derived from the northern margin of Gondwana, although the AQQ orogenic system also includes abundant ophiolites, arc magmatic rocks and subduction–accretion complexes. Some researchers regard the orogenic system of north Tibet as a typical accretionary orogen built by the development of an evolving arc–accretion complex growing southwards along the margin of the Tarim and North China cratons during the Paleozoic. We propose, based on both published data and our new data, that two distinct accretion and collision orogenies developed in the AQQ during the early Paleozoic. The diagnostic marks are HP–LT metamorphic rocks in the North Altun–North Qilian Mountains and UHP metamorphic rocks in the South Altun–North Qaidam Mountains. A review of metamorphic, geochronological, geochemical and structural data indicates that the North Altun–North Qilian HP–LT metamorphic belt is related to early Paleozoic subduction–accretion and, together with ophiolite mélanges and arc metamorphic–magmatic complexes, forms an early Paleozoic accretionary orogen. By contrast, the South Altun–North Qaidam UHP metamorphic belt is associated with continental subduction and collision, accompanied by Barrovian-type metamorphic overprinting and collision-related magmatism, reflecting an early Paleozoic collisional orogeny.