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Late Paleozoic Mantle Source Nature of Tianshan Orogen, Northwest China: Evidence from the Geochemistry, Zircon U-Pb Dating, Hf and Whole Rock Sr-Nd-Pb Isotopes of the Mafic Dykes

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 81-83页

作者： zhang chengli XU Xueyi WANG Hongliang MA Zhongping GAO Xiaofeng CHEN Junlu State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Xi’an Centre Geological Survey CGSXi’an 710054China

The Tianshan Orogen(TO)is one of the largest typical accretionary orogenic belts in the *** which,the late Paleozoic was a critical era to understand the tectonic and geodynamic transition from accretion to ***,the late Paleozoic tectonic evolutionary history,especially for the time of the ocean-continent transition,is still debated although the origin and tectonic settings for the Paleozoic volcanic,felsic igneous magmatism in TO and reginal geology have been done in the last *** contrast,the researches on the mafic dykes in TO was not systematically carried out till ***-scale mafic dykes are commonly regarded as the products created in a extensional setting,and used to identify the major tectonic events such as rifting and continental break-up and further trace the mantle natures and geodynamic mechanism(Halls,1982;Bleeker and Ernst,2006;Li et al.,2008;Ernst et al.,2010;Srivastava,2011;Hou,2012;Peng,2015;Peng et al.,2019).There are widespread late Paleozoic mafic dykes beside the huge of intermediate-acid igneous rocks in the TO,being an idea object to reveal the extensional events,tectonic evolution and the mantle nature and geodynamic *** present the ICPMS in situ zircon U–Pb dating,Lu-Hf and whole-rock Sr-Nd isotopes as well as the geochemistry data for these mafic dykes to better constraint their petrogenesis and mantle *** zircon U-Pb dating for 12 samples from the representative basic dykes and basalts yield three distinct stages of^332 Ma,316–302 Ma and 288–282 Ma,*** which,the first stage of mafic dykes is mainly occurred in both East Tianshan Orogen(ETO)and West Tianshan Orogen(WTO),and composed of dolerite with minor *** second stage of mafic dyke also can be found in both ETO and ***,in contrast to the first stage of mafic dykes,they have relatively variable rock types from the dolerite/or gabbros to gabbroic *** third stage of mafic dykes are slightly intermediate in

关键词： mafic dykes geochemistry zircon U-Pb dating insitu Hf isotopes whole rock Sr-Nd isotope Tianshan orogen

New constraints on the P-T path of HT/UHT metapelites from the Highland Complex of Sri Lanka

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Geoscience Frontiers 2017年第6期8卷 1405-1430页

作者： P.L.Dharmapriya Sanjeewa P.K.Malaviarachchi L.M.Kriegsman Andrea Galli K.Sajeev chengli zhang Postgraduate Institute of Science University of Peradeniya20400Sri Lanka Department of Geology Faculty of ScienceUniversity of Peradeniya20400Sri Lanka Naturalis Biodiversity Center Darwinweg 2NL-2333 CR LeidenThe Netherlands Department of Earth Sciences Utrecht UniversityBudapestlaan 4NL-3584 CD UtrechtThe Netherlands Department of Earth Sciences ETH ZurichSonnegstrasse 5CH-8092 ZurichSwitzerland Centre for Earth Sciences Indian Institute of ScienceBangalore 560012India Key Laboratory of Continental Dynamics of Northwest University Department of GeologyNorthwest UniversityXi’an 710069China

We report here rare evidence for the early prograde P-Tevolution of garnet-sillimanite-graphite gneiss(khondalite)from the central Highland Complex,Sri *** types of garnet porphyroblasts(Grt_1,Grt_2,Grt_3 and Grt_4)are observed in the rock with specific types of inclusion *** Grt_3 shows evidence for non-coaxial *** the information shows a sequence of main inclusion phases,from old to young:oriented quartz inclusions at core,staurolite and prismatic sillimanite at mantle,kyanite and kyanite pseudomorph,and biotite at rim in Grt_1;fibrolitic sillimanite pseudomorphing kyanite±corundum,kyanite,and spinel+sillimanite after garnet+corundum in Grt_2;biotite,sillimanite,quartz±spinel in Grt_3;and ilmenite,rulite,quartz and sillimanite in Grt_*** pre-melting,original rock composition was calculated through stepwise re-integration of melt into the residual,XRF based composition,allowing the early prograde metamorphic evolution to be deduced from petrographical observations and *** earliest recognizable stage occurred in the sillimanite field at around 575℃ at 4.5 *** collision associated with Gondwana amalgamation led to crustal thickening along a P-T trajectory with an average dP/dT of ~30 bar/℃ in the kyanite field,up to ~660℃ at 6.5 kbar,before crossing the wet-solidus at around 675 ℃ at 7.5 *** highest pressure occurred at P > 10 kbar and T around 780℃ before prograde decompression associated with further *** 825℃ and 10.5 kbar,the rock re-entered into the sillimanite *** temperature peaked at 900℃ at ca.9-9.5 *** near-isobaric cooling led to the growth of Grt_4 and rutile at T ~880℃.Local pyrophyllite rims around sillimanite suggest a late stage of rehydration at T<400℃,which probably occurred after uplift to upper crustal levels.U-Pb dating of zircons by LAICPMS of the khondalite yielded two concordant ^(206)Pb/^(238)U age groups with mean values of 542±2 Ma(MSWD=0.24,Th/U=0.01-0.

关键词： Prograde evolution Melt re-integration Highland Complex Sri Lanka UHT granulites

Granitic magmatism related to early Paleozoic continental collision in North Qinling

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Chinese Science Bulletin 2013年第23期58卷 4405-4410页

作者： zhang chengli LIU Liang WANG Tao WANG XiaoXia LI Lei GONG QiFu LI XiaoFei State Key Laboratory of Continental Dynamics Department of Geology Northwest University Institute of Geology Chinese Academy of Geological Sciences Institute of Mineral Resources Chinese Academy of Geological Sciences Northwest Geological Institute of Nonferrous Metals No. 203 Research Institute of Nuclear Industry

Zircon U-Pb dating of early Paleozoic granitoids in North Qinling yields three age peaks of^500,~452 and^420 *** can be temporally correlated with high-pressure to ultrahigh-pressure metamorphism at ca.500 Ma,retrograde granulite-facies metamorphisms at ca.450 Ma and amphibolite-facies metamorphism at ca.420 Ma,*** first episode of granitic magmatism is considered to have resulted from continental collision,whereas the second and third episodes of magmatism are attributed to crustal *** with the regional geological setting and new results from high-pressure and ultrahigh-pressure metamorphic rocks,the ca.500 Ma magmatism is interpreted as the result of partial melting of sedimentary rocks in accretionary wedge between the south Qinling microcontinent and the north Qinling belt including the southern margin of the North China *** ca.450 Ma intensive magmatism is ascribed to dehydration melting of deeply subducted continental crust at thickened conditions in response to slab breakoff,and the final magmatism in ca.420 Ma is interpreted as the product of partial melting during the tectonic transition from contraction to extension.

关键词：花岗质岩浆作用大陆碰撞早古生代北秦岭锆石U-Pb年龄超高压变质岩区域地质背景岩浆活动

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监察法视阈下党政同责制度完善探析

理论学刊 2023年第6期 117-124页

作者：张成立聊城大学法学院山东聊城252059

监察法是党政同责的重要法律支撑,是压实地方党政领导干部岗位职责的利器,客观上推进了党政同责领域治理效能的提升。但是,从制度角度分析,党政同责对于监察法回应不足、内容滞后,表现在规范性文件制定依据、实体、程序、部门协作等诸... 详细信息

监察法是党政同责的重要法律支撑,是压实地方党政领导干部岗位职责的利器,客观上推进了党政同责领域治理效能的提升。但是,从制度角度分析,党政同责对于监察法回应不足、内容滞后,表现在规范性文件制定依据、实体、程序、部门协作等诸多方面。应当以监察法为指导,确立监察机关在党政同责工作中的主体地位,从监督、调查、处置等多个角度充分保障监察机关依法履行监察职责,科学处理监察机关与地方党委、政府、司法机关等之间的关系,不断完善党政同责制度。

关键词：党政同责监察法制度缺陷完善路径

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用于气体传感器的多孔硅的制备方法研究

化学通报 2010年第6期73卷 568-572页

作者：张皓张成立渤海大学化学化工学院辽宁锦州121000

分别采用化学刻蚀法、电化学腐蚀法和铂助腐蚀法在室温下制备了应用于气体传感器的纳米级多孔硅,并且对其表面形貌及厚度进行了表征。结果表明,3种方法制备的多孔硅孔径从5～100nm不等,并且3种制备方法各具优缺点,可根据实际需要来选择... 详细信息

分别采用化学刻蚀法、电化学腐蚀法和铂助腐蚀法在室温下制备了应用于气体传感器的纳米级多孔硅,并且对其表面形貌及厚度进行了表征。结果表明,3种方法制备的多孔硅孔径从5～100nm不等,并且3种制备方法各具优缺点,可根据实际需要来选择合适的制备方法。

关键词：多孔硅制备气体传感器化学刻蚀法电化学腐蚀法铂助腐蚀法

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全球新生代苦橄岩时空分布特征及意义

地学前缘 2019年第4期26卷 13-21页

作者：袁方林张旗张成立大陆动力学国家重点实验室/西北大学地质学系陕西西安710069 中国科学院地质与地球物理研究所北京100029

苦橄岩是一种高温下形成的超镁铁质熔岩,形成温度一般高出地幔部分熔融而成的玄武岩300~400℃,可以为判断热点提供依据。该文以GEOROC和PetDB两个地质数据库为基础,通过对其中新生代苦橄岩年龄及构造环境数据的统计分析,以期查明新生代... 详细信息

苦橄岩是一种高温下形成的超镁铁质熔岩,形成温度一般高出地幔部分熔融而成的玄武岩300~400℃,可以为判断热点提供依据。该文以GEOROC和PetDB两个地质数据库为基础,通过对其中新生代苦橄岩年龄及构造环境数据的统计分析,以期查明新生代苦橄岩的时空分布特征和厘定出可能的高温热点分布情况。研究表明,新生代有苦橄岩产出的火山活动自中新世开始变得活跃,在更新世和全新世达到顶峰。同时,苦橄岩产出环境多样且具有演变特征,中新世前以CFB和洋岛环境为主,中新世后转为岛弧和洋岛环境为主,更新世和全新世则主要为洋岛环境,总体上来看新生代苦橄岩主要产于大洋环境,并以洋岛环境为主。另外,根据苦橄岩的出露特征可得出现代高温热点可能分布在夏威夷群岛、科隆群岛(厄瓜多尔)、冰岛、加那利群岛、欧洲造山带德国境内的埃费尔山地区、红海洋脊、东非裂谷处、法属留尼汪岛、中国东南沿海广东省境内以及堪察加岛弧10个地区。

关键词：苦橄岩热点新生代数据库时空分布

中国共产党百年政治智慧的多维解读——基于海外学者的认知与评析

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社会主义研究 2023年第1期 64-71页

作者：张成利中共南通市委党校

一百多年来,中国共产党带领人民进行革命、建设和改革,创造了人类历史上最为精彩的发展奇迹。这一现象超越了西方政党理论的解释范畴,引发海外学者对中国共产党政治智慧的深入思考。以百年大党的奋斗之路为基本坐标,海外学者从执政理念... 详细信息

一百多年来,中国共产党带领人民进行革命、建设和改革,创造了人类历史上最为精彩的发展奇迹。这一现象超越了西方政党理论的解释范畴,引发海外学者对中国共产党政治智慧的深入思考。以百年大党的奋斗之路为基本坐标,海外学者从执政理念、战略规划、治理效能、时代格局以及鲜明品格五个方面对中国共产党的政治智慧进行了细致解读。虽然这些解读不足以全面描绘中国共产党波澜壮阔的百年奋斗成就,但这种“他者视角”下的学术探讨与国内学者的研究成果形成互补,对深化新时代执政党建设、构建中国新型政党制度话语有着重要的借鉴意义。

关键词：中国共产党政治智慧海外学者

Short Group Signatures with Efficient Concurrent Join

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China Communications 2014年第11期11卷 90-99页

作者： CHEN Hefeng MA Wenping zhang Cheng SUN Changxia State Key Laboratory of Integrated Service Networks Xidian University Xi'an 710071 China Information and Management Sciences School Henan Agricultural University Zhengzhou 450002 China

Group signature schemes are fundamental cryptographic tools. A group signature scheme allows members of a group to anonymously sign misuse, the anonymity messages. To counter can be revoked by the group manager. The group joining operation is a critical component of group signature scheme, the framing attack can be prevented by group joining processes. This paper presents an efficient group signature scheme with a simple joining protocol that is based on a ＂single message and signature response＂ interaction between the prospective user and the group manager. The security of our group signature is based on the Discrete Logarithm assumption and Decisional Linear Diffie- Hellman assumption. The formal security proof of our scheme is given in the random oracle model. Our scheme is also a very efficient short group signature scheme with efficient concurrent join.

关键词： group signature scheme random oracle model discrete logarithm assumption decisional linear diffie-hellman assumption

基于大数据方法建立大洋安山岩构造环境判别图

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地质通报 2019年第12期38卷 1963-1970页

作者：刘欣雨张旗张成立西北大学地质学系大陆动力学国家重点实验室陕西西安710069 中国科学院地质与地球物理研究所北京100029

岩浆岩的地球化学元素往往对其构造环境具有一定的指示作用,前人使用构造环境判别图描述二者之间的关联关系。然而,安山岩因其岩石成因的复杂性和构造环境的"单调性",在判别图研究领域并未受到重视。收集了GEOROC和PetDB两个数据库中的... 详细信息

岩浆岩的地球化学元素往往对其构造环境具有一定的指示作用,前人使用构造环境判别图描述二者之间的关联关系。然而,安山岩因其岩石成因的复杂性和构造环境的"单调性",在判别图研究领域并未受到重视。收集了GEOROC和PetDB两个数据库中的全球新生代洋中脊安山岩(MORA)、洋岛安山岩(OIA)和岛弧安山岩(IAA)。使用43个元素组成的924个比值建立超过42万个直角坐标系,将三类安山岩数据投入坐标系中,并通过MATLAB计算三者之间的交叠率筛选出4个最佳判别图:lg(Ga/Cs)-lg(Ba/Nb)、lg(TFeO/Ga)-lg(Eu/Pb)、lg(K2O/Nb)-lg(Ga/Cs)和lg(MnO/Pb)-lg(Cs/Nb)。利用核密度曲线对比图分析判别图中的元素及元素比值,结果表明:①LILE(大离子亲石元素)与HFSE(高场强元素)的比值关系能有效区分MORA和IAA;②LILE与其他元素的比值关系则更有利于从三者中识别出OIA;③LILE在一定程度上比HFSE更易于判别大洋安山岩的构造环境。研究表明,安山岩可以成为一种使用范围更广泛的构造环境指示剂,其判别效果甚至优于玄武岩判别图。这也进一步说明,安山岩的成因虽然比玄武岩复杂,但是大数据方法是提取出具有构造环境指示意义的相关关系的有效途径。

关键词：安山岩构造环境大数据地球化学