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September 2010 - February 2019
July 2007 - August 2010
Publications
Publications (59)
The prograde metamorphic P–T conditions of eclogites correspond to the subduction processes of oceanic plates. The conditions may be recorded in mineral inclusions and the compositional zoning of garnets, and they play significant roles in revealing the dehydration depth, geothermal structure of the subduction plate and in understanding arc magmati...
The temporal and spatial variations of exhumation in the central Tibetan Plateau (TP) contain information about timing of the initial rise and growth of the TP. Here, we present multiple system thermochronology data (zircon U-Pb, biotite ⁴⁰Ar/³⁹Ar, zircon and apatite fission track, and apatite (U-Th)/He ages) from the Gaize region, central-western...
Subduction and exhumation processes, acting on each other, play a key role in crustal evolution, and exhumed metamorphic rocks provide a post-mortem to reveal the origin of and the conditions experienced by materials deep inside a subduction zone. The pressure–temperature–time (P–T–t) paths of the recently-discovered Baqing eclogite-bearing high-pr...
Genesis and evolution mechanisms of granites provide clues regarding the development of architecture and composition of continental crust. Lithologically zoned granitoid complexes and mafic microgranular enclaves (MMEs) are common and enlightening in understanding of genesis and, particularly the dynamic evolution of granitoid magmas, as well as ma...
The study of lithic raw material plays an important role in developing archeologists’ understanding of the different adaptive strategies and behaviors of prehistoric people. In this paper, we present new evidence from the Huayang site that reveals lithic raw material procurement and exploitation strategies dating to around 14 ka cal. BP. The Huayan...
The Mozhugongka garnet amphibolites exhibit mineral assemblage of garnet, amphibole, albite, quartz, phengite, epidote, rutile, and chlorite. Based on the metamorphic textures, two metamorphic stages (peak metamorphism: M2; retrograde metamorphism: M3) can be observed: M2: Grt + Hbl + Pl + Qz, M3: Hbl + Pl + Qz. Metamorphic P-T calculations were co...
The northeastern margin of the Tibetan Plateau (NETP) represents an ideal site to probe the far-field effects and plateau growth in response to the collisions of Eurasia Continent with India Plate and intervening terranes. Here, we investigate the fold-and-thrust deformation of the Shule River region in the hinterland of Qilian Shan, NETP since Mes...
Geochemical, Sr–Nd isotopic and geochronological methods were used to reveal the protoliths and geodynamic implications of the newly discovered Triassic Baqing eclogites, eastern Qiangtang terrane, central Tibet. We assessed the mobility of trace elements, and it turned out that high field strength elements (HFSEs) and rare earth elements (REEs) we...
The Qilian Shan, located along the northeastern margin of the Tibetan Plateau, has experienced multiple episodes of tectonic deformation, including Neoproterozoic continental breakup, early Paleozoic subduction and continental collision, Mesozoic extension, and Cenozoic intracontinental orogenesis resulting from the India-Asia collision. In the cen...
Little has been known regarding ~200-Myr-long geologic history of Central China during the Late Paleozoic between two major continental collisional events marked by ~480–440-Ma North Qinling–North Qaidam and ~230-Ma Dabie–Sulu ultrahigh-pressure (UHP) belts, respectively. The Gonghe basin is juxtaposed with major Chinese continental blocks across s...
The Triassic eclogite-bearing central Qiangtang metamorphic belt (CQMB) in the northern Tibetan Plateau has been debated whether it is a metamorphic core complex underthrust from the Jinsha Paleo-Tethys or an in-situ Shuanghu suture. The CQMB is thus a key issue to elucidate the crustal architecture of the northern Tibetan Plateau, the tectonics of...
The Ganzi–Litang fault zone, an outstanding tectonic element in the eastern Tibetan Plateau has been intensively debated as an in-situ suture zone marking relict of a subducted Palaeo-Tethyan oceanic crust or a failed intracontinental rift. This paper reports the garnet amphibolites discovered along the Ganzi–Litang fault zone, eastern Tibetan Plat...
The Lesser Khingan Mountains of northeastern China are heavily forested, making archaeological site identification difficult owing to poor ground surface visibility. Nevertheless, several prehistoric archaeological site discoveries have been made in recent years and a limited number of excavations have been initiated. One of the most important site...
Geochronological (laser ablation–inductively coupled plasma–mass spectrometry, LA–ICP–MS), mineral chemistry, major and trace element, and Sr–Nd–Hf isotopic data are presented for the Tanggula granitoid, the largest granitic pluton in the northern Tibetan Plateau. The Tanggula pluton yields a Late Triassic emplacement age (228–223 Ma) and is magnes...
We have conducted a paleomagnetic investigation on the Middle–Upper Jurassic marine strata exposed in the hanging wall of the Tanggula Thrust system near the Yanshiping area, northern Tibet. Progressive demagnetization experiments successfully isolated stable magnetization over a broad spectrum of demagnetization temperatures. The mean direction of...
Limestone, a major part of the global sedimentary succession, susceptible to post-depositional diagenesis. Studies of limestone geochemistry are essential in the discrimination of tectonic settings of basins in which the limestones were deposited. Six Late Mesozoic and one Tertiary limestone successions of Tibet, western China, that were deposited...
The Qiangtang flood basalt province (QFBP) was recently recognized in northern Tibet, China. It erupted during the Sakmarian–Kungurian and covered an area of more than 5.84 × 10⁵ km², reaching a maximum thickness of 1.5–2.0 km. The Qiangtang basalts have ocean-island basalt (OIB)-type trace element patterns, with enrichments of light rare-earth ele...
As important portion of oceanic crust, oceanic plateaux are geomorphic and tectonic units with large areas, extreme thicknesses and ultra mafic-mafic components. Oceanic plateaux are distributed widely in oceanic plates, especially in Pacific and Indian oceans. Because of the wide distribution and genetic relationship with the mantle plume, ocenic...
We report the occurrence, mineralogy, whole-rock geochemistry, and geochronology of two types of eclogites newly discovered in the western Bangong Meso–Tethyan suture zone (Gaize, central Tibet, western China). Type 1 eclogites contain a peak metamorphic mineral assemblage of garnet + clinopyroxene whereas Type 2 ones are characterized by a peak me...
In order to constrain the detrital provenance of the siliciclastic rocks, palaeogeographic variations, and crustal growth history of central China, we carried out simultaneously in situ U-Pb dating and trace element and Hf isotope analyses on 368 detrital zircons obtained from upper Permian-Triassic sandstones of the Songpan terrane, eastern Tibeta...
In this paper, we attempt to determine the source of the hornfels used to make the famous Late Middle Pleistocene lithic industry from Dingcun in North China. By combining geological mapping and geochemical fingerprinting (μ-XRF), we demonstrate that the source of the hornfels was around the Dagudui Mountain, 7 km east of Dingcun. Taking into consi...
The South Yellow Sea basin in eastern China has experienced a multi-stage tectonic evolution history. The major structures were created when the basin was a foreland basin during the Mesozoic. However the geological evolution of the basin has not yet been corroborated by direct evidence from the underlying basement rocks. Qianliyan Island in the so...
We report the occurrences of the remnants of a Meso-Tethyan oceanic plateau, encompassing an area of ~ 2 × 105 km2 in central Tibet. The plateau remnants include large volumes of pillow basalt formed largely by emergent to subaerial eruption, minor ultramafic intrusives and cumulates, exotic blocks of limestone, radiolarian chert, graywacke, and sh...
Ultrafine powder of zirconium diboride was prepared with zirconium oxychloride, boric acid and glucose as starting materials by solgel and carbothermal reduction methods. Zirconium oxychloride was chelated to form organic esters with citric acid and ethylene glycol. The influences of reaction temperature, molar ratio of B to Zr and C to Zr on the s...
Lots of granitoids occur in north Kunlun faults zone of western Qaidam Basin. Comprehensive petrology, laser ablation ICPMS zircon U-Pb geochronology (LA-ICPMS U-Pb) and geochemistry of drilling basement granites were carried out from north Kunlun faults zone, western Qaidam Basin. Zircon U-Pb isotopic ages of 467 ∼ 450Ma, i.e. Middle-Late Ordovici...
We conducted in situ U–Pb and Lu–Hf isotope analyses of 401 detrital zircons collected from the Songpan–Ganzi Triassic turbidite complex in an attempt to understand the provenance variations of the siliciclastic rocks and the crustal growth history of central China. These detrital zircons exhibit a wide age spectrum with three major peaks at 1.7–2....
The western Qinling region of central China is situated centrally in the Kunlun, Qilian, Qinling, Longmenshan, and Songpan-Ganzi orogens. Late Palaeozoic and Early Mesozoic sediments deposited here may provide keys to understanding the tectonic evolution of the Palaeo-Tethys and collision of the North China and Yangtze Cratons. We conducted in situ...
The 350 km wide and 1300 km long Cenozoic Qilian Shan-Nan Shan thrust belt (QNS) is the widest thrust belt on the Tibetan Plateau (Fig. 1). Located along the northeastern margin of the plateau, the style and magnitude of deformation in the QNS have important implications for how Cenozoic shortening induced by the Indo-Asia collision is accommodated...
Major and trace element, Sr–Nd–Pb and zircon U–Pb and Hf isotope data are presented for the newly discov-ered Abushan volcanic rocks in the southern Qiangtang Terrane, central Tibet. These results offer new in-sights into the evolution of the Tibetan plateau during Cretaceous. The Abushan volcanic rocks are composed mainly of andesites and trachy-a...
Eclogitic metasediments from the central Qiangtang metamorphic terrane provide new insights into the continental subduction during the eastern and western Qiangtang collision. Petrologic observations show that the metasediments correspond to meta-sandstones of a continental margin. It is characterized by the garnet + omphacite + rutile + phengite +...
The elevation of the Tibetan plateau is a revolutionary event in the Earth history, which resulted in change not only of Cenozoic regional and global climate but also of monsoon intensity. A critical aspect for the development of the Tibetan plateau that remains open to intense debate is whether the collision among the Tibetan continental blocks or...
Understanding why continental deformation departs from the theory of plate tectonics requires a detailed knowledge of three-dimensional structures at a lithospheric scale. In Tibet, the end-member models of continental deformation make distinctively different predictions on strain distribution and contrasting structural geometry as a function of de...
Geochronological (sensitive high-resolution ion microprobe, SHRIMP II, and 40Ar/39Ar), major and trace element, and Nd isotopic data are presented for newly discovered early Mesozoic volcanic rocks in and around the central Qiangtang metamorphic belt on the northern Tibetan Plateau. The data indicate that volcanism/magmatism was active during the T...
Some key aspects about the Bangong suture zone, central Tibet, are still open to intense debate. Systematic mapping of the Gerze area across the Bangong suture and the Lhasa and Qiangtang blocks was conducted. Intensive studies, including fieldwork, petrology, petrography, mineral geochemistry, geochemistry, Sr-Nd-Pb isotopes, zircon SHRIMP U-Pb an...
Systematic mapping of the Gaize area (central Tibet) across the middle-western Bangong-Nujiang suture and the Lhasa and Qiangtang blocks was conducted, during which ophiolite overthrust sheets in both northern Lhasa and southern South Qiangtang blocks were documented (Fig. 1A). Geochronological dating shows that these ophiolite sheets could have be...
The Late Triassic Songpan–Ganzi turbidite complex on the eastern Tibetan plateau, which covers an area of ~2.2×105 km2, is one of the largest flysch turbiditic basins on Earth. It is juxtaposed with major Chinese continental blocks across several outstanding Tethyan sutures, and is critical to elucidating the tectonic amalgamation of China. However...
Eclogites characterized by a garnet + clinopyroxene + orthopyroxene + sanidine + rutile assemblage are reported for the first time in the eastern Bangong suture, central Tibet (China). Garnet and sanidine are exsolved from clinopyroxene. Al-exchange barometer for orthopyroxene and garnet and K concentrations in clinopyroxene indicate a peak pressur...
Nd isotope data from pre-Cenozoic siliciclastic rocks from Tibet are used to determine variations of source regions with time and hence tectonic history. On average, the TDM and TCHUR ages of the Tibetan samples are up to 1.83 ± 0.36 Ga and 1.25 ± 0.45 Ga, respectively, indicating that Tibet is underlain by Lower Proterozoic basement and has close...
Field relationship, along with petrographical, petrological, and geochemical characteristics, and zircon populations, indicates
that the plagiogranites from the Lagkor Lake ophiolite in the Bangong-Nujiang suture zone (∼ 20 km south of Gerze County,
central Tibet, China), derived from anatexis of hydrated gabbros by ductile shearing during transpor...
One hundred and forty-four and rifty-two Mesozoic sandstone samples from the Qiangtang block (ca. 32°20′-35° N, 85°-93° E; northern Tibet, China) were conducted for analysis of detrital modes and heavy-mineral spectra, respectively, in an attempt to evaluate their provenance and the type of tectonic setting in which they were deposited. The Lower-M...
Metasiliciclastic rocks and metabasalts from the blueschist-bearing Qiangtang metamorphic belt and the Jinsa suture zone were analyzed for major and trace elements in an attempt to evaluate the affinities of these two tectonic entities. Tholeiitic mid-oceanic-ridge basalts (MORBs) from the Jinsa suture can be distinguished from metabasalts of Qiang...
Eclogites in central Qiangtang, northern Tibet (China) are characterized by the garnet+omphacite+rutile+phengite+quartz assemblage. Hornblende, plagioclase, and sphene occur as retrograde amphibolite facies phases in the eclogites. Pressure–temperature estimates for the primary eclogite assemblage are consistent with minimum pressures of 20–25 kbar...
The macroscopic characteristics, mineral and clastic compositions, textures, carbon and oxygen stable isotopes and paleontological and paleoecological characteristics of Mid-Upper Jurassic carbonates in the Qiangtang basin, northern Tibet, have been studied systematically based on detailed field section surveys. Study shows that the carbonate rocks...
By means of the single-grain zircon U-Pb technique, we have determined the emplacement age of the granite outcrops in the central uplift zone of the Qiangtang basin on the northern slope of the Tanggula range. The result suggests that they are products of repeated magmatic pulsations and upward emplacement from the late Mesozoic to the early Cenozo...
