Yi-Gang Xu

Yi-Gang Xu
Guangzhou Institute of Geochemistry Chinese Academy of Sciences · State Key Laboratory of Isotope Geochemistry

PhD

About

368
Publications
101,480
Reads
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19,409
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Introduction
Yi-Gang Xu currently works at the State Key Laboratory of Isotope Geochemistry, Chinese Academy of Sciences. He does research in Geochemistry, Geology and Petrology with a current project "Linking the earth interior processes and surface system evolution".
Additional affiliations
March 2010 - February 2021
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
Position
  • Director General
January 2005 - September 2010
Chinese Academy of Sciences
Position
  • Professor (Full), Director
June 1998 - present
Chinese Academy of Sciences
Position
  • Professor (Full)

Publications

Publications (368)
Article
This study presents new olivine and whole-rock geochemical data for the Xiaogulihe ultrapotassic volcanic rocks of northeastern China. These data provide insights into the petrogenesis of the rocks of the Erkeshan–Wudalianchi–Keluo–Xiaogulihe (EWKX) potassic–ultrapotassic volcanic belt. The petrography and whole-rock geochemical compositions of the...
Article
Rare-metal mineralization in aluminous granites (i.e., rare-metal granites) is usually associated with high degrees of magma fractionation, strong enrichment in fluxing elements (Li, B, P, and F), and the operation of both magmatic and hydrothermal processes. Experimental data have established the theoretical basis for magmatic- or hydrothermal flu...
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Metasomatism by silicate or carbonatite melts can significantly modify the mineral physical and chemical properties, and the hydrogen geochemical behavior during the interaction of olivine and melt remains unclear. In this study, olivine wate content was measured by SIMS on two peridotite xenolith suites. The water content in the silicate-metasomat...
Article
Minerals in volcanic rocks have been commonly used to reconstruct the physicochemical conditions of crystallization and magma chamber processes (magma mixing and recharge) prior to eruption which are fundamental to deduce the petrogenesis of volcanic rocks. Here we present mineral chemistry including in situ major-trace element and Sr isotopic data...
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The fine structure and thermal state of >200-km-thick cratonic lithosphere remain poorly explored because of insufficient sampling and uncertainties in pressure (P) and temperature (T) estimates. We report exceptionally detailed thermal and compositional profiles of the continental lithospheric mantle (CLM) in the Siberian craton based on petrograp...
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Continental arcs have an episodic magmatic activity over long-time periods, which is believed to modulate long-term climate. Island arcs have also the potential to release large amount of CO2 into the atmosphere, but whether they display an episodic magmatic history throughout their lifespan that contributes to the long-term (>10 Ma) climate change...
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NanoSIMS features a capability of high spatial resolution, which allows for Pb/Pb and U/Pb dating at the submicron scale, using a recently established radio-frequency (RF) oxygen ion source. However, the secondary ion yield of Pb+ is relatively low when using 16O- as the primary beam species compared to that obtained using large-geometry secondary...
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A high‐resolution velocity and anisotropy model of the uppermost mantle under the Hainan Island and surrounding areas is obtained by a tomographic inversion of 8192 Pn arrival‐time data hand‐picked from high‐quality seismograms recorded at a total of 137 seismic stations of our recently deployed HAVESArray portable seismic network and Chinese provi...
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Water content and oxygen isotopes in zircon provide crucial constraints on magma source and process, yet they can be significantly modified by zircon metamictization, which causes secondary water absorption into the zircon crystal and the concomitant oxygen isotope changes. Therefore, it is imperative to develop a screening scheme to select the lea...
Preprint
The nature of the lost lithosphere that subducted between India and Tibet since the Paleocene remains controversial, with existing propositions including it being either entirely continental, oceanic, or a mixture of the two. As the subduction history of this lost lithosphere strongly controlled Tibetan intraplate tectonism, we attempt to further c...
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Plain Language Summary The fact that water is essential in generating granites has been known for a long time. However, its detailed role is poorly understood due to heterogeneous source and complex melting reactions involved in the generation of granites. As a fundamental issue of granite genesis, it remains a long‐standing problem to distinguish...
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The primary driver of magmatism, crustal deformation and metallogeny of the North China Craton in the Jurassic remains actively debated, either attributed to the subduction of the Paleo-Pacific (i.e., Izanagi) plate in the east or to the closure of the Mongol-Okhotsk Ocean in the north. This issue is addressed here by examining temporal and spatial...
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Plain Language Summary The subducting Pacific plate becomes flat in the lower part of the mantle transition zone beneath NE Asia, and a big mantle wedge (BMW) has formed above the flat slab. The BMW controls tectonic and geological activities in NE Asia, which are characterized by large‐scale sedimentary basins, lithospheric thinning, large strike‐...
Article
Our general understanding of mantle composition and dynamics mainly comes from the composition of lavas from oceanic intraplate volcanoes. They are generally accepted to originate from deep, relatively stationary mantle plumes. Many groups of seamounts comprising the West Pacific Seamount Province (WPSP), however, do not form long-lived, narrow and...
Article
Primitive magmas with distinct geochemical signatures that record mantle heterogeneity are obscured in continental intraplate volcanic settings by crustal interaction. Here, we report new geochronological and geochemical data for two adjacent Late Neogene primitive intraplate volcanoes in Northeast China: the Great and Lesser Wangqing River twin vo...
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How subduction-related magmatism starts at convergent plate margins is still poorly understood. Here we show that boron isotope variations in early-formed boninites from the Izu-Bonin arc, combined with radiogenic isotopes and elemental ratios document rapid (~0.5 to 1 Myr) changes in the sources and makeup of slab inputs as subduction begins. Hete...
Article
The Ko-g and Ma-f~j tephras are two key isochronous marker layers in northern Japan, which are from the largest Plinian eruptions of Komagatake volcano (VEI=5) and Mashu caldera (VEI=6), respectively. Despite extensive radiocarbon studies associated with the two tephras, individual calibrated results show considerable variations and thus accurate a...
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A detailed 3-D model of P wave isotropic velocity and azimuthal anisotropy beneath SE Asia is obtained by jointly inverting local earthquake arrival times and teleseismic relative traveltime residuals. Our results show that the high-velocity (high-V) subducting Australian slab has penetrated through the mantle transition zone (MTZ) and reached a de...
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Active volcanoes in East Asia pose potential threats to the surrounding areas. The eruptive history of many of the Japanese volcanoes are well understood, but their dispersal pathways are often based on visible tephra. Additionally, other important volcanoes in the region still require a deeper understanding of their eruptive potential. Here we exp...
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The mineralogical and geochemical features of titanite and associated minerals in a rare sample of kyanite-coesite-rutile-bearing eclogite from the Udachnaya-Vostochnaya kimberlite pipe have been studied in detail. Subidiomorphic titanite grains (100–300 μm) were identified in the intergranular space. The composition of individual grains of titanit...
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The Siberian Traps large igneous province (STLIP) is commonly invoked as the primary driver of global environmental changes that triggered the end-Permian mass extinction (EPME). Here, we explore the contributions of coeval felsic volcanism to end-Permian environmental changes. We report evidence of extreme Cu enrichment in the EPME interval in Sou...
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The Pur‐Banera belt of metasedimentary rocks, in the Bhilwara region of the Aravalli Craton, northwestern India, constitutes a Mesoproterozoic rift‐related supracrustal sequence. The Pur‐Banera belt, while containing psammitic, calcareous and ferruginous metasediments, is dominated by garnet–staurolite–kyanite‐bearing metapelites. Here we integrate...
Article
The geochemistry of oceanic intraplate (primarily oceanic island and seamount) lavas can provide essential information on the composition and evolution of their mantle source and geodynamics. Due to very limited rock sampling of the many mid-Cretaceous Wake seamounts in NW Pacific, the mantle source lithology and petrogenesis of their lavas, and th...
Article
The origin of enriched mantle 1 (EM1) component in the mantle has long been debated. EM1 source of basalts has been variously attributed to recycled sub-continental lithosphere, recycled lower continental crust, or recycled oceanic crust plus pelagic sediments. Molybdenum stable isotope systematics has the potential to resolve this debate, because...
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How serpentinites in the forearc mantle and subducted lithosphere become involved in enriching the subarc mantle source of arc magmas is controversial. Here we report molybdenum isotopes for primitive submarine lavas and serpentinites from active volcanoes and serpentinite mud volcanoes in the Mariana arc. These data, in combination with radiogenic...
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A seismic low velocity layer (LVL) above the mantle transition zone (MTZ), often thought to be caused by volatile-induced melting, can significantly modulate planetary volatile cycles. In this work, we show that an LVL observed beneath northeast Asia is characterized by small, 0.8{plus minus}0.5 vol%, average degrees of partial melting. Seismically...
Article
Gravity lineaments are well recognized along plate boundaries and in the interiors of oceanic plates. However, the formation mechanism of intracontinental gravity lineaments remains poorly understood. The North–South Gravity Lineament (NSGL), which extends >4000 km from Russia to South China, is characterized by an abrupt change in the observed Bou...
Article
Northward drift of the Cimmerian microcontinents and opening of the Neo-Tethys Ocean in Early Permian are prominent events in northern Gondwana's protracted breakup history. However, the geodynamic setting responsible for these events is controversial. The dispersal of the eastern Cimmerian microcontinents was accompanied by the emplacement of Qian...
Article
Identification of possible factors that affect Li-mineralizing potential is important to the understanding of the genesis of Li pegmatites. This study provides a comprehensive characterization of the recently discovered Bailongshan Li pegmatite district based on geochronological, petrological, mineralogical, thermal modeling, and Li isotopic data....
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Three different conceptual models have been proposed for the Cenozoic subduction style in South Asia, including Greater India, Intra-oceanic Arc, and Continental Terrane (or Greater Indian basin). Since these models imply distinctive origins for the Tethyan–Greater Himalayan (TGH) sequences, for example, as a relic of the subducted Greater India or...
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Potassium-rich volcanism occurring throughout the Alpine-Himalayan belt from Spain to Tibet is characterized by unusually high Th/La ratios, for which several hypotheses have brought no convincing solution. Here, we combine geochemical datasets from potassic postcollisional volcanic rocks and lawsonite blueschists to explain the high Th/La. Source...
Article
Despite numerous studies, the origin of intraplate basalts from eastern Asia is still elusive. This includes the relative importance of subducted oceanic crust and metasomatized lithospheric mantle in generation of these lavas. To address this important issue, we have carried out an integrated Mg-Sr-Nd isotope study of Jiaohe garnet pyroxenite xeno...
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In 40Ar/39Ar dating, the 39ArK generated is dependent on the irradiation conditions, and the accumulation fast neutron fluence is a critical parameter for 40Ar/39Ar dating. With technological advancement, especially in the ultra-low background and multicollector technology, the boundary conditions to choose irradiation condition have been greatly i...
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Cretaceous rift basin evolution was an important part of tectonic history of NE Asia in the late Mesozoic. Three types of rift basins are identified, active, passive and wide rift basins, and they developed in different regions. Passive rift basins in the eastern North China craton are thought of as the consequence of crustal stretching and passive...
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Enhanced regional subduction-related volcanism in the South China craton concurrent with Siberian Traps large igneous province magmatism was a likely contributor to major biotic and environmental stresses associated with the Permian-Triassic boundary (ca. 252 Ma) mass extinction. However, the timing, intensity, and duration of this regional volcani...
Article
The Early Permian Tarim large igneous province (LIP) in northwestern China comprises voluminous basaltic lava flows, as well as ultramafic and silicic intrusions. The age and duration of the Tarim LIP remains unclear, and thus the rate of magma production and models of potential environmental effects are uncertain. Here we present high-precision ch...
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Olivine‐hosted melt inclusions have the potential to provide direct evidence about the nature of the mantle sources of magmas. In this study, we report the major and trace element and Sr–Nd–Pb–Hf isotope compositions of the Lijiang picrites from the Emeishan large igneous province, as well as major and trace element and Pb isotopic compositions of...
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Kimberlite-borne mantle eclogites represent an important diamond source rock. Although the origin and stability of diamond, as opposed to its low-pressure polymorph graphite, have been studied for decades, their relationship in rare natural samples where both polymorphs coexist remains poorly constrained. In order to shed new light on this issue, s...
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High-precision U-Pb zircon ages of 125.755 ± 0.061 Ma and 124.122 ± 0.048 Ma, respectively, represent the onset and termination of Yixian Formation in the Jin-Yang basin, bracketing its duration to 1.633 ± 0.078 Myr.
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Plain Language Summary The India‐Asia collision has resulted in substantial continental extrusion in the Cenozoic. Associated with this extrusion process, the Tibetan mantle flowed along the west edge of the Yangtze Craton where the Permian Emeishan Large Igneous Province was emplaced. Here, we use seismic anisotropy to inspect footprints left by t...
Article
Processes operating within magmatic crystal mushes exert a fundamental control on the physical and chemical evolution of mid-ocean ridge systems. It is widely recognized that mush fluidization in response to magma recharge could produce variable compositional zoning in crystals. However, olivines generally show relatively smooth MgFe zoning in comp...
Article
Eastern China provides a precious opportunity to explore how subduction drives evolution of the overlying continental lithosphere and to understand the fate of subducted plates. In this study, a synthesis of geochronological, whole-rock geochemical and zircon Hf isotopic data is used to examine temporal and spatial variations in distribution, compo...
Article
The widespread Middle Jurassic to Early Cretaceous (J2-K1) intraplate tectonism of East Asia has recently been proposed to reflect the flat subduction of the Izanagi plate, whose mechanism, however, remains poorly constrained. Here, we compare these geological records with those within the western United States (U.S.) during the Laramide flat subdu...
Article
Igneous rocks related to abnormal high heat flow preserved in ancient convergent margins provide direct clues to identify fossil ridge-subduction. The Khanka Massif, as a witness of the final termination of the Paleo-Asian Ocean in Late Paleozoic, provides an ideal opportunity to trace the fossil ridge-subduction. Different types of Permian igneous...
Article
Cenozoic intraplate basalts are widespread above the Big Mantle Wedge (BMW) and its front in East Asia. While the mantle source lithology and redox-hydration state have been demonstrated to be crucial in generation of the basalts above the BMW, their nature and role on the basalts above the front of the BMW is poorly constrained. To address this, w...
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Whether arc magmatism occurs above oceanic subduction zones is the forefront of studies on convergent plate margins. The most important petrologic issue related to the evolution of arc systems is the origin of arc magmatism, among which arc basalts are the most important one because they provide insights into mantle enrichment mechanism and crust-m...
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The potential role of the lower oceanic crust in the source region of mid-ocean ridge basalts has been examined by a series of partial melting experiments on three natural pyroxenite xenoliths entrained in alkali basalts well representing the lower oceanic crustal material at 1 GPa, 1100-1300°C. Layered experiments were also performed to simulate t...
Article
The Chinese Altay orogen is an important part of the giant Central Asian Orogenic Belt. However, its tectono–metamorphic evolution is still a matter of debate. Here, we report Devonian pelitic granulites at the Wuqiagou area in the southern Chinese Altay orogen. They are characterized by an assemblage of garnet + orthopyroxene + cordierite ± spinel...
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The oxidation state of the mantle plays an important role in many chemical and physical processes, including magma genesis, the speciation of volatiles, metasomatism and the evolution of the Earth’s atmosphere. We report the first data on the redox state of the subcontinental lithospheric mantle (SCLM) beneath the Komsomolskaya–Magnitnaya kimberlit...
Article
In East Asia our understanding of Holocene climate change, forcing mechanisms and propagation, require the precise chronological control of palaeoclimate records to allow robust integration of data sets. The existing chronologies, predominantly based on ¹⁴C method, however, are not sufficient to constrain key questions about abrupt climate shifts t...
Article
Climate warming, probably as a result of massive degassing of greenhouse gases from the Siberian Traps magmatism, has often been acclaimed as a major cause of the end-Permian mass extinction. Indeed, several studies have documented a sudden rise in seawater temperatures during the latest Permian-earliest Triassic, as evidenced by oxygen isotopic re...
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The Earth's mantle shows large‐scale geochemical heterogeneities bounded by several identifiable end‐member compositions. However, the origin of extreme mantle reservoirs, for example, high ²³⁸U/²⁰⁴Pb (HIMU), and their location in the Earth's interior remains poorly constrained. Clinopyroxenes from late Cenozoic Wudi lavas in eastern China have het...
Article
The redox state, often expressed as oxygen fugacity (fO2), is a fundamental parameter controlling geochemical and geodynamic processes. Recent studies have revealed highly variable convective-mantle fO2 values, but causes of the variability are poorly understood. High fO2 values of up to 1.6 log units above the Fayalite–Magnetite–Quartz (FMQ) buffe...
Article
The Wuda Tuff Flora in the North China Craton (NCC) is a “vegetational Pompeii” and one of the most completely preserved marsh ecosystems of the late Paleozoic Northern Hemisphere. However, the precise age, geochemistry, and petrogenesis of the thick tuff containing this peat-forming flora have not been established. We conducted a comprehensive pet...
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Temporal geochemical comparisons are conducted for representative magmatism from western Northern Luzon to reconstruct the Cenozoic tectonics. Oligo‐Pleistocene magmas from western Northern Luzon display elemental and Sr‐Nd‐Hf‐Pb‐O isotope geochemistry similar to intraoceanic arc magmatism, consistent with derivation from the mantle wedge, coupled...
Article
Pelitic granulites from the southern Chinese Altai record a prominent Permian high–temperature reworking event. The lack of solid constraints on anatexis and metamorphic P–T path of these rocks has hindered our understanding of the thermo–tectonic history of Chinese Altai orogen. Here, we present a detailed field and petrological study of the pelit...