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| 1 | Origin of C type adakite magmas in the NE Xing'an block, NE China and tectonic implication显示文摘In this paper, we report new whole-rock geochemical and zircon U–Pb data for monzogranites in the NE Xing'an block. These data constrained the petrogenesis of C type(high Sr/Y) adakitic rocks and showed the spatial extent of the influence of the Mongol-Okhostsk ocean tectonic regime and the collision between the Jiamusi Massif and Songliao Terrane. New zircon laser-ablation inductivity coupled plasma mass spectrometry(LA-ICP-MS) U–Pb data indicated that the monzogranites in the studied area were emplaced in the Early Jurassic(~180 Ma). These rocks were characterized by unusally high SiO_2(C67.49), and Sr(461–759 ppm), but strikingly low Y(4.63–8.06 ppm) and HREE(P HREE = 3.83–6.49 ppm, Yb = 0.5–0.77 ppm)contents, with therefore high Sr/Y(67.2–119) and(La/Yb)N(29.7–41.5) ratios, showing the geochemical characteristics of C type adakitic granite. The data displayed negligible Eu anomalies(Eu/Eu~ = 0.77–1.08), LREE-enriched and pronounced negative Nb and Ta anomalies. The C-typeadakites in the studied area were most likely derived from the partial melting of a thickened lower continental curst. The magma source is most likely dominated by amphibolites and garnet amphibolites. In combination with previously-reported data from igneous rocks from the Mesozoic in NE China, we conclude that the Xing'an block was influenced by the Mongol-Okhotsk subduction tectonic system, and experiences compressive settings from the amalgamation of the Jiamusi block in the east of the CAOB. | Changzhou Deng Guangyi Sun Deyou Sun Hu Huang Jianfeng Zhang Jun Gou | 2018 | Acta Geochimica2018，37，2： | 5 |
| 2 | Age and geochemistry of Early Ordovician A-type granites in the Northeastern Songnen Block,NE China显示文摘Early Ordovician A-type granites in the northeastern(NE) Songnen Block NE China were studied to better understand the geodynamic settings in this region.This research presents new zircon U–Pb ages and wholerock geochemical data for the Early Ordovician granites in the NE Songnen Block. Zircon U–Pb dating indicates that the granite in the Cuibei, Hongxing, and Meixi areas in the NE Songnen Block formed in the Early Ordovician with ages of 471–479 Ma. The granites show geochemical characteristics of high SiO2 and K2 O compositions and low FeOT, MgO, CaO, and P2 O5 compositions. They belong to a high K calc-alkaline series and display a weak peraluminous featurPe with A/CNK values of 0.98–1.14. The rocks have aREE composition of 249.98–423.94 ppm,and are enriched in LREE with(La/Yb)Nvalues of2.87–9.87, and display obvious Eu anomalies(d Eu =0.01–0.29). Trace elements of the studied granites are characterized by enrichment in Rb, Th, U, Pb, Hf, and Sm,and depletion of Ba, Nb, Ta, and Sr. They display geochemical features of high Zr +Y + Nb+Ce values(324–795 ppm) and Ga/Al ratios consistent with A-type granites. Based on particular geochemical features, such as high Rb/Nb(7.98–24.19) and Y/Nb(1.07–3.43), the studied A-type granites can be further classified as an A2-type subgroup. This research indicates that the Early Ordovician A-type granites were formed by the partial melting of ancient crust in an extensional setting. Lower Sr/Y and(Ho/Yb)Nratios indicate that plagioclase and amphibole are residual in the source, and garnet is absent, implying that the magma was generated at low levels of pressure. By contrast, the contemporaneous granites in the SE Xing'an Block suggest a subduction-related tectonic setting, and its adakitic property indicates a thickened continental crust.We suggest that the Paleo-Asian Ocean plate between the Xing'an and Songnen blocks subducted northward during the Early Ordovician. Meanwhile, the NE Songnen Block was exposed to a passive continental margin tectonic setting. | Changzhou Deng Deyou Sun Guangyi Sun Changlu Lv Zhen Qin Xianquan Ping Guanghui Li | 2018 | Acta Geochimica2018，37，6： | 1 |
| 3 | Mercury isotope constraints on the genesis of late Mesozoic Sb deposits in South China显示文摘The late Mesozoic antimony(Sb)mineralization belt in South China hosts a large portion of the world’s Sb reserves.However,the source and mineralization processes of these Sb deposits remain controversial.Here,we measured mercury(Hg)concentrations and isotopic compositions of stibnite in the Banpo Sb-only and Woxi Sbpolymetallic ore deposits,as well as associated rocks in the Yangtze Block in order to constrain the metal sources and ore formation processes in the South China Sb mineralization belt.Stibnite samples from both deposits exhibit significant enrichment in Hg(4.23–50.6 ppm)and have higher δ^(202)Hg values(−0.47‰to 2.03‰)than the studied Precambrian basement rocks(−1.42‰to 0.59‰),Paleozoic sedimentary rocks(−2.40‰to−0.32‰),and other natural Hg reserves(e.g.,marine and continental systems).This indicates that significant mass-dependent fractionation of Hg isotopes occurred during hydrothermal processes.Negative to slightly positive Δ^(199)Hg values of−0.17‰to 0.02‰were obtained for stibnite from the studied deposits,similar to values for the Precambrian basement rocks,but different from those of the Paleozoic sedimentary rocks and data previously reported for mantle materials.This suggests that Precambrian basement rocks were the source of Hg and associated metals.Our data and the tectonic evolution of South China indicate that late Mesozoic asthenospheric upwelling,in response to the Paleo-Pacific oceanic slab foundering,generated heat that drove the circulation of fluids in the basement and crustal basinal rocks.These fluids leached Sb,Hg,and other metals from the Precambrian basement rocks and formed the world-class Sb mineralization belt in South China. | Changzhou DENG Jiawei ZHANG Ruizhong HU Kai LUO Yanan ZHU Runsheng YIN | 2022 | Science China Earth Sciences2022，65，2： | 1 |
| 4 | The Cu-Mo Mineralization of the Late Jurassic Porphyry in the Northern Great Xing'an Range: Constraints from Zircon U-Pb Ages of the Ore-Causative Granites显示文摘The Great Xing’an Range(GXAR)is one of the most important metallogenic belts in China.Previous study has shown that porphyry Cu-Mo deposit distributed in the northern Great Xing’an Range formed mainly in two stages:(1)Early Ordovician,such as Duobaoshan and Tongshan deposits(Liu et al.,2017);2)Triassic-Early Jurassic,including Wunugetushan,Taipingchuan and Badaguan deposits(Tang et al.,2016).In recent years,two potential porphyry Cu-Mo deposits,Huoluotai and Xiaokele,were discovered in the Erguna Block,northern GXAR(Figs.1a–b).However,the ore formation ages and regional metallogenic regularity are ambiguous due to the lack of isotopic ages.Two zircon U-Pb ages from the ore-causative granites were reported in this paper,with the aims to constrain the metallogenic ages and provide evidence for study of the regional metallogenic regularity and ore prospect prediction. | DENG Changzhou LI Guanghui | 2019 | Acta Geologica Sinica(English Edition)2019，93，1： | 1 |
| 5 | Binary molten salt in situ synthesis of sandwich-structure hybrids of hollowβ-Mo2C nanotubes and N-doped carbon nanosheets for hydrogen evolution reaction显示文摘Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(HER)performance is very important for large-scale and efficient electrolysis of water.Herein,a sandwich composite structure(designed as MS-Mo2C@NCNS)ofβ-Mo2C hollow nanotubes(HNT)and N-doped carbon nanosheets(NCNS)is designed and prepared using a binary NaCl–KCl molten salt(MS)strategy for HER.The temperature-dominant Kirkendall formation mechanism is tentatively proposed for such a three-dimensional hierarchical framework.Due to its attractive structure and componential synergism,MS-Mo2C@NCNS exposes more effective active sites,confers robust structural stability,and shows significant electrocatalytic activity/stability in HER,with a current density of 10 mA cm-2 and an overpotential of only 98 mV in 1 M KOH.Density functional theory calculations point to the synergistic effect of Mo2C HNT and NCNS,leading to enhanced electronic transport and suitable adsorption free energies of H*(ΔGH*)on the surface of electroactive Mo2C.More significantly,the MS-assisted synthetic methodology here provides an enormous perspective for the commercial development of highly active non-noble metal electrocatalysts toward efficient hydrogen evolution. | Tianyu Gong Yang Liu Kai Cui Jiali Xu Linrui Hou Haowen Xu Ruochen Liu Jianlin Deng Changzhou Yuan | 2023 | Carbon Energy2023，5，12： | 0 |
| 6 | Permian tectonic evolution and continental accretion in the eastern Central Asian Orogenic Belt:A perspective from the intrusive rocks显示文摘The tectonic evolution and history of continental accretion of the eastern Central Asian Orogenic Belt(CAOB)are not yet fully understood.In this study,we investigate Permian intrusive rocks from the Jiamusi Block of the eastern CAOB to constrain the tectonic evolution and continental accretion of this region during the late-stage evolution of the Paleo-Asian Ocean.Our new data show that Early Permian gabbro-diorites were derived from the partial melting of depleted mantle metasomatized by oceanic-slab-released fluids.Middle Permian adakitic granites have low Na2O and MgO and high K2O contents,indicating a thickened-lower-crust source.Late Permian S-type granites were derived from the partial melting of continental crust.A compilation of the available geochronological data for Permian intrusive rocks(including adakitic and A-,S-,and I-type granites and mafic rocks)from the eastern CAOB reveals that the A-type granites formed mainly during the Early–Middle Permian,S-type and adakitic granites mostly during the Middle–Late Permian,and I-type granites and mantle-derived mafic rocks throughout the Permian.The A-type granites,which are proposed to have been sourced from thinned continental crust,indicate an extensional setting in the eastern CAOB during the Early Permian.The Middle–Late Permian adakitic granites imply a thickened continental crust,which indicates a compressional setting.Therefore,the eastern CAOB underwent a transition from extension to compression during the Middle Permian,which was probably triggered by the late-stage subduction of Paleo-Asian oceanic crust.Considering the petrogenesis of the intrusive rocks and inferred regional tectonic evolution of the eastern CAOB,we propose that vertical underplating of mantle-and oceanic-slabderived magmas contributed the materials for continental crust accretion. | Anzong Fu Hongyan Geng Changzhou Deng Chenglu Li Jishuang Ding Bizheng Yang Wenpeng Yang | 2024 | Geoscience Frontiers2024，15，2： | 0 |
| 7 | Roller-coaster atmospheric-terrestrial-oceanic-climatic system during Ordovician-Silurian transition:Consequences of large igneous provinces显示文摘The Ordovician-Silurian transition(OST)hosted profound and frequent changes in the atmospheric-terres trial-oceanic-climatic system(ATOCS).Previous studies have found contrasting stages for such changes,primarily based on hiatus-interrupted sections.However,the dominant driving factors and mechanisms reconciling such frequent changes remain controversial.Mercury isotopes,which undergo both massdependent and mass-independent fractionation,can provide critical insights into the deep-time ATOCSs,especially for those impacted by large igneous provinces(LIPs)events.Here,we build a highresolution multi-proxy record of Hg(concentrations and isotopic compositions)combined with organic carbon isotopes(δ^(13)Corg)and whole-rock geochemical data(including trace elements and phosphorus)from continuous cores in the Yangtze Platform,South China.Our data,combined with reported ones,indicate the occurrence of LIP eruptions against localized volcanism,and four successive,yet contrasting stages of ATOCSs during the OST.Moreover,we identified the coupling between two-pulse LIP magmatism and extreme ATOCSs,each with special pCO_(2),weathering rate,primary productivity,redox condition,climatic mode,and biotic evolution.For stage I,the first pulse of LIP magmatism triggered global warming,enhanced terrestrial weathering,oceanic acidification,eutrophication,anoxia,P recycling,and thereby widespread deposition of black shales.During stage II,the Hirnantian glaciation and oxygenation arose from the intense chemical weathering and black shale deposition of stage I;slashed terrestrial weathering and oceanic oxygenation facilitated CO_(2) accumulation.In stage III,another pulse of LIP magmatism triggered the de-glaciation,and the ATOCS was largely similar to that of stage I.This led to another round of oxygenation and positive d13Corg excursion in stage IV.Compared with the environmental pressure by the peculiar ATOCS of each stage,their transitions might have been more devastating in triggering the prolonged Late Ordovician Mass Extinction(LOME).Moreover,limited biotic recovery was possible in the later portion of stages I and III.The multi-proxy study of continuous strata of the OST provides an excellent framework for better illuminating LIPs’essential role in driving the“roller-coaster”behavior of the ATOCS and thus biotic crisis during the pivotal period of the OST. | Licai Song Qing Chen Huijun Li Changzhou Deng | 2023 | Geoscience Frontiers2023，14，3： | 0 |
| 8 | Remote Tracking Gas Molecular via the Standalone-Like Nanosensor-Based Tele-Monitoring System显示文摘Remote tracking the variation of air quality in an effective way will be highly helpful to decrease the health risk of human short-and long-term exposures to air pollution.However,high power consumption and poor sensing performance remain the concerned issues,thereby limiting the scale-up in deploying air quality tracking networks.Herein,we report a standalone-like smart device that can remotely track the variation of air pollutants in a power-saving way.Brevity,the created smart device demonstrated satisfactory selectivity(against six kinds of representative exhaust gases or air pollutants),desirable response magnitude(164–100 ppm),and acceptable response/recovery rate(52.0/50.5 s),as well as linear response relationship to NO2.After aging for 2 weeks,the created device exhibited relatively stable sensing performance more than 3 months.Moreover,a photoluminescence-enhanced light fidelity(Li-Fi)telecommunication technique is proposed and the Li-Fi communication distance is significantly extended.Conclusively,our reported standalone-like smart device would sever as a powerful sensing platform to construct high-performance and low-power consumption air quality wireless sensor networks and to prevent air pollutant-induced diseases via a more effective and low-cost approach. | Han Jin Junkan Yu Daxiang Cui Shan Gao Hao Yang Xiaowei Zhang Changzhou Hua Shengsheng Cui Cuili Xue Yuna Zhang Yuan Zhou Bin Liu Wenfeng Shen Shengwei Deng Wanlung Kam Waifung Cheung | 2021 | Nano-Micro Letters2021，13，2： | 0 |
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