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A subduction channel model for exhumation of oceanic-type high-pressure to ultrahigh-pressure eclogite-facies metamorphic rocks in SW Tianshan,China

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Science China Earth Sciences 2016年第12期59卷 2339-2354页

作者： LI JiLei GAO Jun wang xinshui Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences

High-pressure(HP) and ultrahigh-pressure(UHP) eclogites exposed in collisional orogens are widely regarded to record the history of crustal rocks that were subducted to mantle depths and exhumed back to the *** into subduction and exhumation processes plays an important role in understanding the nature and evolution of subduction zones,geodynamics and plate *** contrast to continental-type HP to UHP metamorphic rocks that are dominated by felsic lithology,oceanic-type HP to UHP metamorphic rocks are dominated by mafic eclogites and thus have greater density,and their exhumation needs to overcome large barriers and may involve complicated tectonic *** exhumation of HP to UHP rocks is mainly influenced by the internal buoyancy,however,the external tectonic forces(such as channel flow) also act as effective exhumation drivers;in addition,effects of tectonic settings(such as slab rollback and breakoff) should take into *** HP-UHP metamorphic terrane in Southwestern Tianshan,which mainly comprises of metasediments with interlayered metamafic lenses and blocks,represents a typical accretionary melange associated with deep subduction of oceanic ***,the exhumation mechanisms of these once deeply buried HP-UHP rocks are still under *** on the field occurrences,petrographic features,peak metamorphic P-T conditions and ages of the eclogites/blueschists and their metasedimentary country rocks,a "sediment-type subduction channel" model is advocated in this study to appraise/decipher the formation and evolution of Southwestern Tianshan HP-UHP metamorphic ***-cyclic metamorphic eclogites record the multistage burial-exhumation cycling manipulated by convective flow in a channel-like interface between the plates,giving robust evidence for the presence of a subduction *** addition,this study summarizes some remaining geotectonic problems and research perspectives concerning the Southwestern Tianshan HP-UHP me

关键词： Eclogite High-pressure metamorphism Oceanic crust Exhumation Subduction channel Southwestern Tianshan

Petrogenesis and Geodynamic Implications of Late Jurassic Diorite Porphyry in the Neoproterozoic Ophiolitic Mélange of NE Jiangxi (South China)

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1008-1023页

作者： wang xinshui GAO Jun LI Jilei JIANG Tuo XUE Shengchao Key Laboratory of Mineral Resources Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Institutions of Earth Science Chinese Academy of Sciences Beijing 100029 China College of Earth Science University of Chinese Academy of Sciences Beijing 100049 China College of Earth Science and Engineering Shandong University of Science and Technology Qingdao266590 China Laboratory of Isotope Geochemistry Wuhan Centre of China Geological Survey Wuhan 430205 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China

Mesozoic magmatism is widespread in the eastern South China Block and has a close genetic relationship with intensive polymetallic mineralization. However, proper tectonic driver remains elusive to reconcile the broad intracontinental magmatic province. This study presents integrated zircon U-Pb dating, Hf isotopes and whole-rock geochemistry of the Xiwan dioritic porphyry in the NE Jiangxi ophiolitic mélange. Zircon U-Pb dating by SIMS and LA-ICP-MS methods yielded an emplacement age of ～160 Ma for the Xiwan diorite, confirming its inclusion into the Mesozoic magmatic province in SE China, instead of a component of the Neoproterozoic ophiolitic mélange genetically. The dioritic rocks have low Si02(58.08 wt%-59.15 wt%), and high NaO(5.00 wt%-5.21 wt%) and MgO(4.60 wt%-5.24 wt%) contents with low TFeO/MgO ratios(1.02-1.09). They show an adakitic geochemical affinity but exhibit relatively low Sr/Y ratios(24.8-31.1) and high Y contents(14.6-18.3 ppm) compared to the Dexing adakitic porphyries. In addition, the Xiwan diorites have moderately evolved zircon Hf isotopic compositions(ε(t)=-6.1--0.1; T=1597-1219 Ma). These elemental and isotopic signatures suggest that the Xiwan diorite formed through partial melting of a remnant arc lower crust(i.e., early Neoproterozoic mafic arc-related rocks) in response to the underplating of coeval mafic magmas. In conjunction with the temporal-spatial distribution and complex geochemical characteristics of the Mesozoic magmatism, our case study attests to the feasibility of a flat-slab subduction model in developing the broad intracontinental magmatic province in SE China. The flat-slab delamination tends to trigger an asthenospheric upwelling and thus results in extensive partial melting of the overlying lithospheric mantle and lower crustal materials in an extensional setting during the Mesozoic.

关键词： adakite flat-slab subduction Mesozoic NE Jiangxi South China Block

西天山巴仑台地区晚石炭世岩浆岩的岩石成因及其构造背景

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地球科学 2022年第3期47卷 1038-1058页

作者：张喜王信水江拓高俊五矿勘查开发有限公司北京100010 中国地质大学地球科学学院湖北武汉430074 中国地质调查局武汉地质调查中心同位素地球化学研究室湖北武汉430205 中国科学院地质与地球物理研究所矿产资源研究重点实验室北京100029

位于中亚造山带西段和塔里木克拉通之间的天山造山带的古生代构造演化历史目前还存在很大争议,其广泛发育的古生代岩浆岩则是揭示俯冲增生过程和构造体制转换的重要岩石探针.本文对我国西天山巴仑台地区的7个古生代岩浆岩进行了系统的... 详细信息

位于中亚造山带西段和塔里木克拉通之间的天山造山带的古生代构造演化历史目前还存在很大争议,其广泛发育的古生代岩浆岩则是揭示俯冲增生过程和构造体制转换的重要岩石探针.本文对我国西天山巴仑台地区的7个古生代岩浆岩进行了系统的年代学和地球化学研究.LA-ICP-MS锆石U-Pb定年限定它们的结晶年龄在319~307 Ma之间,均形成于晚石炭世.地球化学特征显示晚石炭世的镁铁质岩浆岩主要起源于软流圈地幔或者受俯冲交代富集的岩石圈地幔;而同期花岗质岩石总体上均属于准铝质-弱过铝质的中钾钙碱性和高钾钙碱性I型花岗岩,主要起源于下地壳基性岩的部分熔融.根据西天山地区古生代岩浆岩的时空分布规律及变质岩、蛇绿岩和沉积岩的研究成果,本文提出320~310 Ma的岩浆岩形成于板片断离的构造背景,标志着由大陆碰撞向后碰撞的构造体制转换;而310~307 Ma的岩浆岩形成于后碰撞伸展的构造背景.

关键词：中亚造山带天山岩浆作用板片断离地球化学

《老子》无为思想及价值观辨正——基于理论理性的分析

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兰州学刊 2017年第11期 97-106页

作者：王新水苏州大学哲学系

如果为"无为"者是人而非拟人化的道或者天,那么这一概念表达的不是行为者与行为的承受者之间的关系,而是行为者与其所须遵守之道之间的关系,这时,《老子》"无为"的精确含义,实际是指行为者遵守道且对道本身不施加任何行为,而非像我们常... 详细信息

如果为"无为"者是人而非拟人化的道或者天,那么这一概念表达的不是行为者与行为的承受者之间的关系,而是行为者与其所须遵守之道之间的关系,这时,《老子》"无为"的精确含义,实际是指行为者遵守道且对道本身不施加任何行为,而非像我们常认为的那样,仅仅是指对行为的承受者做出遵循道的行为,因为循道而为对行为的承受者而言也是一种作为而非无为。《老子》追求的最高价值不是道、自然无为或其他善,而是没身不殆和如其所是的长生久视,道、自然无为和其他善不过是实现这一目标或最高价值的最佳方式。从理论理性或思辨理性来看,根据《老子》所追求的最高价值及其"反者道之动"的观点可推知:"无为"不会只是主张"弱者道之用",而也会承认并要求"强者道之用";对于自然和社会中的恶之花,"无为"绝不会任其自然,而必然会有为以制止。

关键词：道—法则自然无为善长久理论理性

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俯冲带硫的地球化学行为及硫循环

岩石学报 2022年第5期38卷 1345-1359页

作者：李继磊高俊黄高风马智佩王信水中国科学院地质与地球物理研究所矿产资源研究院重点实验室北京100029 中国科学院地球科学研究院北京100029 中国地质大学(武汉)地球科学学院武汉430074

俯冲带是全球最大的物质循环系统,控制着硫(S)在地球内部圈层及表层的循环,影响着大气圈、水圈、生物圈、岩石圈的稳定性以及地球的宜居性。厘清S在俯冲带中的地球化学行为和循环特征对理解地球各储库的氧化还原状态、岩浆作用与演化、... 详细信息

俯冲带是全球最大的物质循环系统,控制着硫(S)在地球内部圈层及表层的循环,影响着大气圈、水圈、生物圈、岩石圈的稳定性以及地球的宜居性。厘清S在俯冲带中的地球化学行为和循环特征对理解地球各储库的氧化还原状态、岩浆作用与演化、成矿物质聚集、以及地球大气成分等具有重要意义。本文首先总结了进入俯冲带之前的大洋岩石圈的S结构模型,对S在大洋板片中的分布状态和地球化学特征进行了系统归纳。随后,系统阐述了俯冲带高压-超高压变质岩记录的板片变质及脱水过程中硫的地球化学行为。岩石学研究表明俯冲板片中的S多以硫化物相存在,硫酸盐矿物在弧前深度就已被释放或分解。相较于熔体,俯冲带流体中S的溶解度更高,是运移硫的更有效方式。DEW模型计算结果显示,流体中S含量总体较低,但在俯冲板片~90km处其含量有一个峰值(浓度0.5%~1.0%)。岩相学证据、地球化学测试结果、磷灰石S近边吸收结构(S-XANES)特征以及模拟结果都显示俯冲深部流体中S多以HS^(-)及H_(2)S形式存在,不含大量的SO_(4)^(2-)及硫酸盐;中f_(S_(2))流体有利于S迁移出俯冲板片,从而促进俯冲带大规模S循环,而高f_(S_(2))流体在流-岩交换过程沿流体通道发生S的锁固作用而不利于俯冲带S循环。质量平衡计算显示全球俯冲带S输入通量为4.65×10^(13)g/yr,弧下深度板片S输出通量为2.91×10^(12)g/yr,板片-岛弧S循环效率仅6.3%。俯冲板片在弧下深度可能存在一个短暂高效的S释放窗口,释放流体的δ^(34)S值为-2.1±3.0‰。基于高压-超高压变质岩中硫化物的研究,初步厘清了俯冲板片中S的地球化学行为,首次从板片角度全面、定量地限定了俯冲带的脱硫通量、效率、种型和同位素特征,提出俯冲带循环的S不是岛弧岩浆的氧化剂,与岛弧环境的正δ^(34)S值也无直接因果联系,对解析俯冲带S循环和理解地球长期的S循环具有重要意义。最后,本文还展望了俯冲带S循环的未来发展方向,应在俯冲带流体氧化还原性质(硫酸盐的命运)、俯冲沉积物对S循环的制约、俯冲带环境下多硫同位素的分馏效应、S循环与其它挥发分(如C等)循环之间的耦合关系、地球历史上深部S循环等方向做出探索,更深入地理解俯冲带及全球S循环过程。

关键词：俯冲带硫循环高压-超高压变质岩板片流体岛弧氧逸度

中天山地块南缘两类混合岩的成因及其地质意义

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岩石学报 2019年第10期35卷 3233-3261页

作者：王信水江拓高俊高强李继磊张喜中国科学院地质与地球物理研究所矿产资源院重点实验室北京100029 地质过程与矿产资源国家重点实验室中国地质大学地球科学学院武汉430074 中国地质调查局武汉地质调查中心同位素地球化学研究室武汉430205 中国地质环境监测院北京100081 中国五矿集团北京100010

中天山地块是位于中亚造山带西南缘的西天山造山带的重要组成块体,其基底演化和构造亲缘性对恢复西天山的增生造山方式和大地构造格局具有重要意义。混合岩在中天山地块的高级变质地体中广泛分布,是揭示中天山地块基底演化和构造属性的... 详细信息

中天山地块是位于中亚造山带西南缘的西天山造山带的重要组成块体,其基底演化和构造亲缘性对恢复西天山的增生造山方式和大地构造格局具有重要意义。混合岩在中天山地块的高级变质地体中广泛分布,是揭示中天山地块基底演化和构造属性的窗口。本文通过开展锆石U-Pb年代学和Hf同位素及岩石地球化学研究,确定了中天山地块南缘乌瓦门杂岩的两类条带状混合岩的原岩性质和形成时代以及混合岩化作用时代和成因机制。第一类条带状混合岩的原岩为中基性岩屑砂岩,混合岩化时代为~1. 8Ga,是在同期角闪岩相变质过程中通过变质分异形成的。第二类条带状混合岩的古成体包括黑云角闪斜长片麻岩和黑云斜长角闪片麻岩,原岩均形成于~2. 5Ga,并叠加~1. 8Ga角闪岩相变质作用,是洋陆俯冲背景下由俯冲洋壳或岩石圈地幔部分熔融形成。侵入古成体的变基性岩墙形成于~1. 72Ga,具有Fe-Ti玄武岩的地球化学特征,起源于后碰撞伸展背景下的软流圈地幔。该类混合岩的浅色体同时穿插古成体和变基性岩墙,呈现突变的野外接触关系,与区域内约787~785Ma混合岩化同期,即混合岩化作用是外来岩浆注入的结果,可能是造山带垮塌引发地壳深熔作用的产物。乌瓦门杂岩记录的~2. 5Ga岩浆活动、~1. 8Ga变质作用和~790Ma混合岩化作用可以和塔里木北缘进行对比,暗示中天山地块是一个具有确切新太古代-古元古代结晶基底的微陆块,并且和塔里木克拉通存在构造亲缘性。

关键词：混合岩中天山地块天山造山带中亚造山带

Genetically and geochronologically contrasting plagiogranites in South Central Tianshan ophiolitic mélange:Implications for the breakup of Rodinia and subduction zone processes

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Genetically and geochronologically contrasting plagiogranite...

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Tuo Jiang Jun Gao Reiner Klemd Qing Qian Xi Zhang xinshui wang Zhou Tan Zhixin Zhu Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences China Minmetals Corporation Xinjiang Academy of Geological Survey

Plagiogranites are exposed as exotic blocks at two localities(Wuwamen and Guluogou) in the South Central Tianshan ophiolitic mélange and have U–Pb zircon ages of 775 ± 11 Ma and 416 ± 4 Ma,*** Wuwamen plagiogranites have low-K tholeiitic to medium-K calc-alkaline and weakly peraluminous *** further display relatively low concentrations of total rare earth elements(REEs),pronounced positive Eu anomalies and distinct depletions of P and *** trace element characteristics,whole-rock initialSr/ Sr ratios from 0.708812 to 0.708839 and negative eNd(t) values from 6.4 to 6.2 suggest that the granitic magma was derived from low degree partial melting of amphibolites at middle to lower crustal levels with hornblende as the dominant residual *** contrast,the Guluogou plagiogranites are strongly peraluminous and are characterized by an enrichment of both large ion lithophile elements(LILEs) and light rare earth elements(LREEs).Negative anomalies of Nb,Ta,P and Ti are in accordance with the geochemical signature of Andean arc-type *** zircon eHf(t) values from 6.1 to +2.4,the corresponding two-stage Hf model ages(T= 1259–1798 Ma) and the eNd(t) values from 5.0 to 2.9 favor partial melting of ancient continental crust,which was contaminated by some juvenile material from a depleted-mantle wedge,for the origin of the Guluogou ***,we conclude that the Wuwamen and Guluogou plagiogranites have no direct genetic relationship with the ophiolites and occur as exotic blocks in the ophiolitic mé*** is further suggested that the 775 Ma Wuwamen plagiogranites originated during the breakup of Rodinia,whereas the 416 Ma Guluogou plagiogranites were generated in an Andean-type active continental margin environment related to the northward subduction of the South Tianshan Ocean.

关键词： Geochemistry Geochronology Plagiogranite South Central Tianshan ophiolitic mélange Subduction Rodinia

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基于FPGA的巴克码发生器与识别器的设计

电子技术（上海） 2010年第2期37卷 38-40页

作者：王心水曲阜师范大学信息技术与传播学院

文章先介绍了巴克码的特点与巴克码识别器的原理,接着在MAX+plusⅡ 10.0软件平台上,用VHDL语言设计了7位巴克码发生器与识别器,并对其进行了编译和时序仿真,最后又配置到可编程逻辑器件EP1K30TC144-3进行了验证。测试结果表明了该设计... 详细信息

文章先介绍了巴克码的特点与巴克码识别器的原理,接着在MAX+plusⅡ 10.0软件平台上,用VHDL语言设计了7位巴克码发生器与识别器,并对其进行了编译和时序仿真,最后又配置到可编程逻辑器件EP1K30TC144-3进行了验证。测试结果表明了该设计的有效性。

关键词：群同步现场可编程门阵列超高速集成电路硬件描述语言

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一种基于单片机的多功能温度控制器的设计

电子技术（上海） 2010年第1期37卷 46-47,45页

作者：王心水曲阜师范大学信息技术与传播学院

文章以STC89C52RC为控制芯片,利用Dallas公司生产的1-Wire数字温度传感器DS18B20,完成温度测量、温度控制、上下限报警及LCD显示等功能。整个系统具有体积小、集成度高、可靠性强、可扩展性强、功耗低等特点。

关键词： 1-Wire总线 DS18B20传感器 LCD1602