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The Characteristics and Significance of Peng Co Peridotites in the Middle Segment of Bangong Co-Nujiang Suture in Tibet

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Acta Geologica Sinica(English Edition) 2020年第S01期94卷 37-38页

作者： LU Yuxiao YANG Jingsui DONG Yufei XIONG fahui chen Xiaojian LI Guanlong BO Rongzhong Center for Advanced Research on the Mantle(CARMA) Key laboratory of Deep-Earth Dynamics of Ministry of Natural ResourcesInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China

The Peng Co ophiolite is located to the west of Peng lake in the area of lakes in north Tibet, which belongs to the Baila-Yilashan sub-belt of the the middle Bangong Co-Nujiang ophiolitic belt. The Peng Co ophiolite is mainly composed of mantle peridotites, cumulates, diabase dikes. About 70 percent peridotites are harzburgites and 30 percent are lherzolites. Mineral chemistry of the Peng Co lherzolitesare characterized by low Fo contents(88.85–90.33) of olivine and high Al2O3 content(4.26%–7.25%) in pyroxenes. Compared to the primitive mantle, the Peng Co peridotites have relatively higher MgO contents, lower CaO, Al2O3 and TiO2 contents. The total rare-earth element(REE) contents of the lherzolites are 1.11–1.53 ppm, which are lower than those of the primitive mantle. The chondritenormalized REE patterns of the Peng Co peridotites display slight loss in LREE. In the primitive mantle-normalized spider diagram, the Peng Co peridotites exhibit negative Rb and Zr anomalies and intensively positive U, Ta, Sr anomalies. The PGE contents of Peng Co lherzolites are between 22.9–27 ppb. The chondrite-normalized PGE patterns of the Peng Co lherzolites are consistent with that of the primitive mantle. Mineral and whole-rock geochemistry characteristics of the Peng Co lherzolites show an affinity to abyssal peridotites, indicating that it may have formed in the mid-ocean ridge setting. Through quantitative modeling, we conclude that the Peng Co lherzolites formed after 5%–10% degree of partial melting of the spinelphase lherzolite mantle source. The sharp increase of Cr#(56.74–60.84)in Spinel of harzburgites and relatively high Pd/Ir and Rh/Ir ratios suggest that they have experienced melt-rock reaction. The crystallization sequence of Peng Co cumulate is olivine-clinopyroxene-plagioclase. The Mg# value of clinopyroxene in cumulate peridotite ranges from 86.92 to 89.93, and the mean value of Fo is 84.45, which is obviously higher than that of MOR-type ophiolite cumulates. The

关键词： Bangong Co-Nujiang suture zone MOR-type peridotites Peng Co ophiolite partial melting melt-rock reaction

Sticked-Layer Strategy to a Flexible-Robust Hydrogen-Bonded Organic Framework for Efficient C_(2)H_(2)/CO_(2)Separation

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CCS Chemistry 2024年第3期6卷 663-671页

作者： Zhen Yuan Xianghua Jiang Liangji chen Junjie chen Lu Li Yisi Yang Yunbin Li fahui Xiang Shengchang Xiang Banglin chen Zhangjing Zhang Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007

Flexible-robust hydrogen-bonded organic frameworks(HOFs)are attracting increasing interest due to their excellent separation performance for important industrial gases,but the construction remains ***,a sticked-layer strategy is first proposed to construct a flexible-robust HOF,HOFFJU-8,from a donor(D)–π–acceptor(A)molecule 4,4′,4″,4‴-(pyrrolo[3,2-b]pyrrole-1,2,4,5-tetrayl)tetrabenzonitrile(DP-4CN).HOF-FJU-8 is amicroporous three-dimensional framework composed of two kinds of DP-4CN molecules,one acting as building units for the two-dimensional layer via C≡N···H–C hydrogen bond dimers and another as the sticks to link the layers along channels through D–Aπ···π*** activated framework HOF-FJU-8a possesses flexible-robust pore characteristics,as determined by the gas adsorption and in situ gas-loaded powder X-ray ***-FJU-8a exhibits adaptive adsorption and stronger binding affinity to C_(2)H_(2)rather than CO_(2)due to the flexible-robust nature,which can effectively separate acetylene and carbon dioxide mixtures.

关键词： hydrogen-bonded organic framework flexible-robust sticked-layer D-Aπ···πinteraction in situ powder X-ray diffraction C_(2)H_(2)/CO_(2)separation

Petrogenesis of Peridotites from the Purang Ophiolite in Western Part of Yarlung-Zangbo Suture Zone, Southern Tibet

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Acta Geologica Sinica(English Edition) 2015年第A02期89卷 125-126页

作者： ZHOU Wenda YANG Jingsui ZHAO Junhong MA Changqian XIONG fahui XU Xiangzhen chen Yanhong TIAN Yazhou Institute of Geology and Mining China Nonferrous Metals (Guilin) Geology and Mining Co. Ltd Guilin 541004 CARMA State Key Laboratory of Continental Tectonics and Dynamics Institute of Geology Chinese Academy ofGeological Sciences Beijing 100037 Faculty of Earth Sciences China University of Geosciences Wuhan 430074 College of Resource and Environmental Engineering Guizhou University Guiyang 550025

Peridotites are an important part of ophiolites： they not only record plate tectonic settings and events, but also offer help to interpret the composition of the mantle and the effect of the deep mantle. The Yarlung-... 详细信息

关键词： RESEARCH Ophiolites Suture zones (Structural geology) Geochemistry Mid-ocean ridges Petrogenesis Peridotite

Geological Evidence does not Support a Shallow Origin for Diamonds in Ophiolite

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Acta Geologica Sinica(English Edition) 2020年第S01期94卷 70-72页

作者： YANG Jingsui LIAN Dongyang Paul T ROBINSON QIU Tian XIONG fahui WU Weiwei School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China Center for Advanced Research on Mantle(CARMA) Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China College of Marine Science and Technology China University of GeosciencesWuhan 430074China

Farré-de-Pablo et al.(2018)report a new occurrence of in situ microdiamonds enclosed in chromite from ophiolitic chromitite pods hosted in the Tehuitzingo serpentinite of southern *** discovery enlarges the number of occurrence of the ophiolite-hosted microdiamonds to 7 countries in the world,including India(Das,2015,2017),Albania(Xiong et al.,2017;Wu et al.,2017),Turkey(Lian et al.,2017),Myanmar(chen et al.,2018),Russia(Yang et al.,2015),and China(Bai et al.,1993;Xu et al.,2009).The microdiamonds occur in ophiolitic podiform chromitites and peridotites,and are generally interpreted as UHP phases formed at pressures>4 GPa(Yang et al.,2014;Griffin et al.,2016;Das et al.,2017).However,Farré-de-Pablo et al.(2018)conclude that the Tehuitzingo diamonds were formed under low-temperature and low-pressure conditions during serpentinization,which challenges the current knowledge of diamond ***,we discuss several lines of evidence that do not support the authors’conclusion.

关键词： diamonds in ophiolite serpentinization chemical vapor deposition UHP crystallization

Improvement of electrocatalytic alcohol oxidation by tuning the phase structure of atomically ordered intermetallic Pd-Sn nanowire networks

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Science China Materials 2022年第10期65卷 2694-2703页

作者： Zhengshuai Cao Xianzhuo Lao fahui Gao Min Yang Jing Sun Xuehua Liu Rui Su Jianyu chen Peizhi Guo Institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Atomically ordered intermetallic compounds(OICs)have aroused remarkable interests for wide applications and are considered as very promising materials for electrocatalysis owing to the strict stoichiometry,well-defined atom binding environment,and the specific crystalline ***,the tunable synthesis of the intermetallics remains a giant ***,this study reports the preparation of the Pd-Sn OICs composed of an interconnected nanowire network structure with adjustable molar ratios of elements Pd and *** co-reduction of Pd(acac)_(2) and SnCl_(2)·2H_(2)O in ethylene glycol(EG)in the presence of sodium hypophosphite(NaH_(2)PO_(2))as the reducing agent affords OICs of three phases:hexagonal Pd_(3)Sn_(2-)P6_(3)/mmc,orthorhombic PdSn-Pnmb,and orthorhombic PdSn_(2)-Aba_(2).Also,the pure phase can convert to two mixed phases(Pd_(3)Sn_(2)/PdSn and PdSn/PdSn_(2))by just altering the feed *** is found that orthorhombic PdSn-Pnmb OIC has a large electrochemically active surface area(ECSA),excellent electrocatalytic performance(4857 mA mg_(Pd)^(−1)),and outstanding stability toward ethanol oxidation reaction(EOR),which could be attributed to its optimal electronic *** results demonstrate that the phase engineering of OICs with desired components is an excellent way for catalysts design.

关键词： PdSn intermetallic compounds alloy electrocatalysis fuel cell

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跗外侧血管蒂骰骨瓣移位术的临床应用

中华显微外科杂志 1999年第1期22卷 22-24页

作者：陈振光张发惠湖北医科大学附属第二医院显微骨科福州市中国人民解放军医学高等专科学校

目的为了寻求和解决踝足部骨缺损、骨不连、距骨骨折脱位和距骨体缺血性坏死等疑难病例的有效疗法。方法通过对３０侧下肢标本解剖观测了供应骰骨背侧血管的来源、走行、分支和吻合。设计以跗外侧血管为蒂的骰骨瓣移位植骨术治疗有关疾... 详细信息

目的为了寻求和解决踝足部骨缺损、骨不连、距骨骨折脱位和距骨体缺血性坏死等疑难病例的有效疗法。方法通过对３０侧下肢标本解剖观测了供应骰骨背侧血管的来源、走行、分支和吻合。设计以跗外侧血管为蒂的骰骨瓣移位植骨术治疗有关疾患共２９例。结果临床实践证实疗效满意。有２７例经１～８年随访，其中优良率达９６％。结论带跗外侧血管骰骨瓣具有解剖位置表浅、手术操作简便、效果可靠等优点。

关键词：跗外侧血管骰骨瓣移位术踝足部骨缺损

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细纱上销与下销的优化配置

棉纺织技术 2005年第5期33卷 40-42页

作者：陈名均聂发辉涂志武江西华源江纺有限公司

介绍了新型尼龙上销、下销的几何特点,针对上销与下销配置不当在纺纱中出现牵伸不良的现象,对两种平面宽度下销和三种钳口面宽度上销进行了优化配置纺纱试验,并通过适当调整后区牵伸倍数、胶辊表面粗糙度参数,实现了顺利纺纱,取得了较... 详细信息

介绍了新型尼龙上销、下销的几何特点,针对上销与下销配置不当在纺纱中出现牵伸不良的现象,对两种平面宽度下销和三种钳口面宽度上销进行了优化配置纺纱试验,并通过适当调整后区牵伸倍数、胶辊表面粗糙度参数,实现了顺利纺纱,取得了较好的纺纱质量。

关键词：细纱牵伸上销配置胶辊表面粗糙度牵伸倍数工艺

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察尔汗盐田“单元格”走水路线探讨

石化技术 2020年第5期27卷 108-109页

作者：陈刚张发慧青海盐湖工业股份有限公司钾肥分公司青海格尔木816000

单元走水方式解决了现有走水方式的不足,亦能够保证将卤水中的钾离子"吃干榨净"。实现了精准分布矿厚,以达到光卤石矿的充分、均衡利用,达到快长矿、长好矿,均衡成矿的目的。

关键词：单元格最大化成矿质量

Geochronology and Geochemistry of the Magmatic Rocks from Zedong Ophiolite, Eastern Yarlung-Zangbo Suture Zone, Tibet

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 45-页

作者： XIONG fahui YANG Jingsui Paul T.ROBINSON GAO Jian ZHANG Lan chen Yanhong LAI Shengming CARMA Centre for Continental DynamicsInstitute of GeologyChinese Academy of Geological Sciences Kunming University of Science and Technology School of Earth Science and Mineral Resources China University of Geosciences

The Yarlung Zangbo suture zone extends more than2000 km along southern Tibet and marks the boundary between the Indian subcontinent and *** Zedong terrane has been not suggested to represent the vestige of such an intra-oceanic arc developed within the Neo-Tethys Ocean,as a result of the northward subduction of the Neo-Tethys Ocean during the Late *** this study,we present detailed geochemical and geochronological data of various types of magmatic rocks widely exposed in the Zedong terrane to constrain the formation age and tectonic setting of the Zedong *** found that the Zedong volcanic rocks belong to high K2O calc-alkaline series,whereas the diabase and gabbro plotted in the low-K *** basalt rocks are highly enriched in LREE and LILE,but strongly depleted in HFSE,indicating they were derived from a metasomatized *** gabbros and diabase have similar N-MORB geochemistry indicates that the cumulates were produced from MOR *** from four samples,including the basalt rocks(158-161Ma)are older than the gabbro(131 Ma),certificate the gabbro are as the vein intrude into the basalt *** suggests that the volcanic eruption and plutonic emplacement were coevally developed in the Zedonghave similar positiveεHf(t)values(+2.0 to+15.6)and(+8.6 to+18.4),indicating they were stemmed from similarly depleted mantle sources,same with the gabbro and granitic rocks from the Gangdese ***,we proposed that the basalt rocks in the Zedong terrane were formed through partial melting of the mantle wedge metasomatized by slab-released fluids/melts.A part of hydrous basalts were underplated in the thickened lower crust beneath the Zedong terrane,which gave rise to the cumulate and granitic *** suggests that the Zedong terrane represents a slice of the active continental margin developed on the southern margin of the Lhasa terrane as a result of the northward subduction of the Neo-Tethys Ocean during the Late Jurassic

关键词： Tibet Geochronology and Geochemistry of the Magmatic Rocks from Zedong Ophiolite Eastern Yarlung-Zangbo Suture Zone