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高职院校大学生入党教育提质增效工作路径研究

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重庆电子工程职业学院学报 2024年第1期33卷 123-129页

作者：张莉飞江苏财会职业学院基础教育学院江苏连云港222061

坚持为党育人、为国育才是高职院校面临的迫切任务,落实好、贯彻好立德树人根本任务至关重要。大学生党建工作是高职院校基层党组织建设的基础性工程,把优秀大学生凝聚到党的队伍周围,对实现中华民族伟大复兴的宏伟目标具有重要的现实... 详细信息

坚持为党育人、为国育才是高职院校面临的迫切任务,落实好、贯彻好立德树人根本任务至关重要。大学生党建工作是高职院校基层党组织建设的基础性工程,把优秀大学生凝聚到党的队伍周围,对实现中华民族伟大复兴的宏伟目标具有重要的现实意义。文章以高职院校大学生入党教育为研究对象,从大学生入党教育的内容、形式、途径等方面分析存在问题,并提出“五个聚焦”工作路径。

关键词：高职院校高职大学生入党教育提质增效路径

基于DEW模型的地球深部流体组成与水岩相互作用计算方法综述

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地学前缘 2024年第1期31卷 64-76页

作者：兰春元张立飞陶仁彪胡晗张丽娟王超北京大学地球与空间科学学院北京100871 北京高压科学研究中心北京100094

水岩相互作用会导致流体中元素的价态、赋存形式等发生改变,进而对元素的富集成矿、循环通量等产生影响。由于地球深部样品与实验数据有限,建立和使用地球深部流体模型可以有效地增加人们对深部流体及水岩相互作用的认知。Deep Earth Wa... 详细信息

水岩相互作用会导致流体中元素的价态、赋存形式等发生改变,进而对元素的富集成矿、循环通量等产生影响。由于地球深部样品与实验数据有限,建立和使用地球深部流体模型可以有效地增加人们对深部流体及水岩相互作用的认知。Deep Earth Water(DEW)模型是一种描述地球深部流体热力学性质的数据库,其可以与矿物热力学数据库联用,实现对地球深部水岩相互作用过程的模拟研究。本文阐释了使用DEW模型描述深部流体的必要性,叙述了应用DEW模型进行深部流体物种和水岩相互作用计算的基本原理,介绍了一种基于DEW模型计算流体物种的软件——FluidsLab,列举了地球深部流体以及水岩相互作用的应用案例与研究现状,最后对DEW模型后续的应用与发展方向进行展望。

关键词：水岩相互作用俯冲带地球深部流体热力学 DEW模型

显生宙碰撞造山带超高温变质作用的加热机制:来自二维数值模拟的约束

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岩石学报 2024年第4期40卷 1044-1060页

作者：樊银龙张立飞李忠海焦淑娟王杨邹雷北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室北京100871 中国科学院大学地球与行星科学学院计算地球动力学重点实验室北京100049 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029

大量的岩石学证据表明:碰撞造山带中常发育900~1100℃的超高温变质作用。然而,碰撞造山带中如何出现如此极端的超高温条件仍然存在争议。为了更好地理解超高温变质作用加热机制和碰撞造山带中主要热源的相对贡献,我们建立了一系列高分... 详细信息

大量的岩石学证据表明:碰撞造山带中常发育900~1100℃的超高温变质作用。然而,碰撞造山带中如何出现如此极端的超高温条件仍然存在争议。为了更好地理解超高温变质作用加热机制和碰撞造山带中主要热源的相对贡献,我们建立了一系列高分辨率二维热-动力学模型,借此探讨了俯冲大陆岩石圈密度亏损程度、大陆地壳放射性生热率和大陆汇聚速率等因素对碰撞造山过程中超高温变质主要热源的影响。当大陆岩石圈密度亏损(Δρ=ρ软流圈地幔-ρ岩石圈地幔)大于50kg/m^(3)时,有利于发生大陆平板俯冲,软流圈地幔无法上涌为地壳物质提供热源;此时,具有较高放射性生热率(>3μW/m^(3))的地壳可以发生“浅俯冲-折返”型超高温变质作用。而当大陆岩石圈密度亏损小于10kg/m^(3)时,大陆上地壳在深俯冲阶段首先发生超高压榴辉岩相变质作用,随后伴随着大陆岩石圈地幔后撤和软流圈上涌,进而出现以异常高的地幔热流加热为主的“深俯冲-折返”型超高温变质作用。此外,较低的大陆汇聚速率(<1cm/yr)更有利于“深俯冲-折返”型超高温变质作用的产生。将数值模拟结果与特提斯构造域的变质岩石数据和地球物理观测进行对比,我们认为在现今板块构造体制下,由具有密度亏损程度较高的大陆岩石圈平俯冲有利于“浅俯冲-折返”型超高温变质作用的发生,而由密度亏损程度较低的大陆岩石圈俯冲可能导致“深俯冲-折返”型超高温变质作用的产生。

关键词：超高温变质作用碰撞造山带大陆岩石圈密度数值模拟特提斯构造域

The exhumation of high-and ultrahigh-pressure metamorphic terranes in subduction zone:Questions and discussions

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Science China Earth Sciences 2020年第12期63卷 1884-1903页

作者： lifei zhang Yang Wang MOE Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencePeking UniversityBeijing100871China

In terms of petrology,thermomechanical simulation is an important frontier to study the geodynamic process of the exhumation and uplift of high pressure(HP)to ultrahigh pressure(UHP)metamorphic rocks in subduction zones and collision orogenic *** on the recent petrological studies and numerical modellings for the exhumation of HP to UHP metamorphic terranes,the exhumation mechanisms of HP to UHP metamorphic terranes can be roughly summarized into ten types:channel flow,diapiric exhumation,a coexistence mechanism of channel flow and diapiric exhumation,slab breakoff,multi-stage exhumation,divergent plate motion(including slab rollback and the upper-plate divergent motion away from the subducted plate),overthrust exhumation,overpressure mechanism,wedge-like extrusion and microplate *** exhumation of high-density UHP oceanic eclogites is a relative controversial *** of our recent researches on quantitatively determining the exhumation mechanism of UHP oceanic eclogites using thermomechanical and phase equilibrium modelling was introduced in details in this *** obtained the 3-D density evolutions of three-type subducted oceanic materials(MORB,serpentine and oceanic sediments)in P-T space by the methods of phase equilibrium and density *** to the density difference between the metabasic and their surrounding rocks,the exhumed eclogites could be divided into two *** first category,the self-exhumation eclogites(ρ_(MORB)ρmantle),which can only be carried back to the surface with the assistance of low-density metasediments and serpentinite due to their negative buoyancy;the coesite-bearing UHP eclogites of Zermatt-Saas in the Western Alps is a typical ***,we further explored the ultimate self-exhumation depth,exhumation mechanism

关键词： HP-UHP metamorphism Exhumation mechanisms Eclogite Density Subduction zone

The Paleoproterozoic and Neoproterozoic Carbon Cycle Promoted the Evolution of a Habitable Earth

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 316-326页

作者： LIU Zhicheng zhang lifei Key Laboratory of Orogenic Belt and Crustal Evolution Ministry of EducationSchool of Earth and Space SciencesPeking UniversityBeijing 100871China

The carbon cycle is an important process that regulates Earth's *** compare two typical periods,in the Paleoproterozoic and Neoproterozoic,in which many geological events *** remains an open question when modern plate tectonics started on Earth and how it has influenced the carbon cycle through *** the Paleoproterozoic,intense weathering in a highly CO_(2)and CH_(4)rich atmosphere caused more nutritional elements to be carried into the *** input boosted high biological productivity,deposition of sediments and the formation of an altered oceanic crust,which may have promoted an increase in the oxygen *** lubrication and a decrease in mantle potential temperature made cold and deep subduction possible,which carried more carbon into the deep *** can be stored in the mantle as diamond and carbonated mantle rocks,being released by arc and mid-ocean ridge outgassing at widely different *** the Paleoproterozoic through the Neoproterozoic to the Phanerozoic,the carbon cycle has promoted the evolution of a habitable Earth.

关键词： carbon cycle great oxidation event modern subduction Paleoproterozoic Neoproterozoic

Preface:Deep Carbon Cycle and Abiotic Methane in the Subduction Zone

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地质学报：英文版 2023年第1期97卷 286-287页

作者： zhang lifei MOE Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China

Two kinds of carbon cycle on Earth have been recognized:surface short-term and deep long-term carbon cycles(Berner,2003;zhang et al.,2017).Over the years,the surface short-term carbon cycle has been attracted extensive attention because of their significance implications in the study of environmental changes of human ***,scientists found more than 98%carbon is stored in the solid Earth which takes great role on the surface carbon cycle(DePaolo,2015;Kelemen and Manning,2015;Plank and Manning,2019;Mao and Mao,2020).Therefore,the research of deep carbon cycle is very significant to the study of the formation and evolution,multi-layered interaction and habitability of the *** the other hand,recent petrological study combined with high pressure-temperature experimental simulation shows that abiotic methane can be formed by the metamorphic reduction of carbonates during the subduction metamorphism(Tao et al.,2018;Wang et al.,2022;zhang et al.,2023).

关键词： cycle carbon Deep

Differential Evolution of High-Pressure and Ultrahigh-Pressure Metapelites from Habutengsu, Chinese Western Tianshan: Phase Equilibria Modelling and ^(40)Ar/^(39)Ar Geochronology

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 628-640页

作者： Lü Zeng zhang lifei The Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking University

Metapelite is one of the predominant rock types in the high-pressure–ultrahigh-pressure（HP–UHP） metamorphic belt of western Tianshan, NW China; however, the spatial and temporal variations of this belt during metamorphism are poorly understood. In this study, we present comparative petrological studies and 40^Ar/39 ^Ar geochronology of HP and UHP pelitic schist exposed along the Habutengsu valley. The schist mainly comprises quartz, white mica, garnet, albite and bluish amphibole. In the Mn O–Na2O–Ca O–K2O–Fe O–Mg O–Al2O3–Si O2–H2O（Mn NCKFMASH） system, P–T pseudosections were constructed using THERMOCALC 333 for two representative pelitic schists. The results demonstrate that there was a break in the peak metamorphic pressures in the Habutengsu area. The northern schist has experienced UHP metamorphism, consistent with the presence of coesite in the same section, while the southern one formed at lower pressures that stabilized the quartz. This result supports the previous finding of a metamorphic gradient through the HP–UHP metamorphic belt of the Chinese western Tianshan by the authors. Additionally, phengite in the northern schist was modelled as having a Si content of 3.55–3.70（a.p.f.u.） at the peak stage, a value much higher than that of oriented matrix phengite（Si content 3.32–3.38 a.p.f.u.）. This indicates that the phengite flakes in the UHP schist were subjected to recrystallization during exhumation, which is consistent with the presence of phengite aggregates surrounding garnet porphyroblast. The 40^Ar/39^ Ar age spectra of white mica（dominantly phengite） from the two schists exhibit similar plateau ages of ca. 315 Ma, which is interpreted as the timing of a tectonometamorphic event that occurred during the exhumation of the HP–UHP metamorphic belt of the Chinese western Tianshan.

关键词： pelitic schist HP–UHP metamorphism P–T pseudosection 40^Ar/39^Ar geochronology Chinese western Tianshan

Redox evolution of western Tianshan subduction zone and its effect on deep carbon cycle

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Geoscience Frontiers 2020年第3期11卷 915-924页

作者： Renbiao Tao Lijuan zhang lifei zhang The MOE Key Laboratory of Orogenic Belt and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Univ Lyon Ens de LyonUniversite Lyon 1CNRSUMR 5276 LGL-TPEF-69622VilleurbanneFrance

Knowing the phase relations of carbon-bearing phases at high-pressure(HP) and high-temperature(HT) condition is essential for understanding the deep carbon cycle in the subduction *** particular,the phase relation of carbon-bearing phases is also strongly influenced by redox condition of subduction zones,which is poorly *** we summarized the phase relations of carbon-bearing phases(calcite,aragonite,dolomite,magnesite,graphite,hydrocarbon) in HP metamorphic rocks(marble,metapelite,eclogite) from the Western Tianshan subduction zone and high-pressure *** prograde progress of subduction,carbonates in altered oceanic crust change from Ca-carbonate(calcite) to Ca,Mg-carbonate(dolomite),then finally to Mgcarbonate(magnesite) via Mg-Ca cation exchange reaction between silicate and carbonate,while calcite in sedimentary calcareous ooze on oceanic crust directly transfers to high-pressure aragonite in marble or amorphous CaCO3 in subduction *** evolution also plays a significant effect on the carbon speciation in the Western Tianshan subduction *** prograde oxygen fugacity of the Western Tianshan subduction zone was constrained by mineral assemblage of garnet-omphacite from FMQ-1.9 to FMQ-2.5 at its metamorphic peak(maximum P-T) *** comparison with redox conditions of other subduction zones,Western Tianshan has the lowest oxygen *** and light hydrocarbon inclusions were ubiqutously identified in Western Tianshan HP metamorphic rocks and speculated to be formed from reduction of Fe-carbonate at low redox condition,which is also confirmed by high-pressure experimental *** on petrological observation and high-pressure simulation,a polarized redox model of reducing slab but oxidizing mantle wedge in subduction zone is proposed,and its effect on deep carbon cycle in subduction zones is further discussed.

关键词： Oxygen fugacity Western Tianshan Subduction zone Deep carbon cycle Polarized redox model

Coesite in metasediments from the Muzhaerte valley, southwestern Tianshan

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Science Bulletin 2019年第2期64卷 78-80页

作者： Zeng Lü lifei zhang Ji Yue Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space Sciences Peking University

The sediments,including calcareous,siliciclastic and volcanoclastic,usually occupy>90%in volume of an accretionary complex and thus,if involved in subduction zones,their maximum return depths(i.e.,peak pressures)are fundamental to unravel the geodynamic processes during the convergence of plates[1].As a unique example of accreted complex returned from sub-arc depths(>90 km)worldwide.

关键词： UHP southwestern Tianshan Coesite in metasediments from the Muzhaerte valley