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Acta Geologica sinica.English Edition) 1992年第1期66卷 39-57页

作者： Li Zhaonai Liu Xiaohan shang ruxiang fei zhenbi institute of geology chinese academy of geological science.institute of geology,academia sinica. 1institute of geology Chinese Academy of Geological Science. 2institute of geology Academia Sinica.

The volcanic rock series on the Fildes Peninsula is the product of the later subduction of the Pacific platebeneath the Antarctic plate. It consists mainly of basalt, basaltic andesite and andesite with minor dacite. Itsisotopic ages range from 64.6±1 to 43±2 Ma, belonging to Palaeocene to Eocene. Volcanism in the area maybe divided into two phases. The contents of major oxides, rare earth elements (REE) and trace elements in vol-canic rocks formed in different phases show regular changes, which are mainly related to the rock associationsof these phases. Isotope geochemical studies indicate that the primitive magma in the area originating by par-tial melting in the upper mantle underwent fractional crystallization and ascended to the high-level (shallow)magma chamber. Before eruption the primitive basalt-andesitic magma was subjected to differentiation in thehigh-level magma chamber, forming zones of derivative magmas of different compositions. In various phasesmagma-conducting faults experienced periodic extension and cut through various derivative magma zones indifferent parts of the peninsula, leading to the eruption of magmas of different compositions on the surface andthe formation of volcanic rock associations of corresponding compositions.

关键词： rock Antarctica The Characteristics and Mechanism of Island-Arc Volcanism on the Central and Southern Fildes Peninsula Arc

The Evolution of Alpine Ultramafic Rocks and Partial Melting of the Upper Mantle

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Acta Geologica sinica.English Edition) 1993年第1期67卷 43-61,122页

作者： Bao Peisheng, Wang Xibin, Hao Ziguo and Peng Genyong institute of geology, chinese academy of geological sciences, Beijing fei zhenbi institute of geology Chinese Academy of Geological Sciences Beijing

Ultramafic rocks of Tibet and Xinjiang are the products of partial melting of the upper mantle. The evolution of their mineral composition is marked by two parallel evolutionary series: one is the progressive increase of the 100 Mg/(Mg+Fe^(2+) ratio of silicate minerals in order of lherzolite→harzburgite→dunite, i.e. the increase in magnesium; the other is the increase of the 100 Cr/(Cr+Al) ratio of accessory chrome spinel in the same order, i. e. the increase in Chromium. The above-mentioned evolutionary trends are contrary to that of magmatic differentiation. The evolution of fabrics of ultramafic rocks is characterized by progressive variation in order of protogranular texture→melted residual texture, symplectic texture and clastophyritic texture→equigranular mosaic texture and tabular mosaic texture. Experiments of partial melting of lherzolite have convincingly shown that the evolution of Alpine ultramafic rocks resulted from the partial melting of pyrolite. Various subtypes of them represent different degrees of partial melting. The vertical zoning marked by more basic rocks in the upper part and more acid rocks in the lower actually belongs to the fusion zoning of pyrolite.

关键词： Alpine ultramafic rocks upper mantle partial melting

Permian Alkaline Granites in Central Inner Mongolia and Their Geodynamic Significance

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Acta Geologica sinica.English Edition) 1995年第1期69卷 27-39页

作者： Hong Dawei, Huang Huaizeng, Lithosphere Research Center, chinese academy of geological sciences, BeijingXiao Yijun, institute of geology, chinese academy of geological sciences, BeijingXu Haiming,institute of Mineral Deposits, chinese academy of geological sciences, Beijingand Jin M anyuanTianjin geological academy, Ministry of Metallurgical Industry, Tianjin fei zhenbi Lithosphere Research Center Chinese Academy of Geological Sciences Beijing China

Alkaline granites (Rb-Sr ages 276-286 Ma)occurring in the Bayan Ul-East Ujimqin belt at the southern margin of the Siberian plate originated in a tensional tectonic environment about 60 Ma earlier than the Late Devonian to Early Carboniferous collision between the Siberian and Sino-Korean plates. They belong to post-orogenic A-type granites and may be used as an indicator of the end of the orogeny. At the northern margin of the Sino-Korean plate, however, only late-orogenic calc-alkaline granites occurred during the late Caboniferous-Permian, and alkaline syenites did not appear until the Late Triassic. The asymmetric magmatism at the margins of the two neighbouring plates might be controlled by the differences in size and mass of the two plates.

关键词： alkaline granite geodynamics Inner M ongolla

A New Idea of Sinian Doushantuo'an Metaphyte Fossils from Xiuning, Anhui Province

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Acta Geologica sinica.English Edition) 1997年第4期71卷 491-501,515-517页

作者： Tang Feng, National geological Museum of China, Xisi, Beijing 100034Yin Chongyu and Gao Linzhiinstitute of geology, chinese academy of geological sciences, 26 Baiwanzhuang, Beijing 100037 fei zhenbi National geological Museum of China Xisi Beijing 100034 institute of geology Chinese Academy of Geological Sciences 26 Baiwanzhuang Beijing 100037 [?]Tang Feng Born in 1965 graduated from the Department of Earth sciences Nanjing University in 1987 got his master degree at the chinese academy of geological sciences in 1993. Now he is associate research professor of the National geological Museum of China and engaged in the study of Precambrian stratigraphy and palaeontology.

This paper gives a summary of the fossil data from the Sinian Doushantuo' an Lantian Formation in the Xiuning area, Anhui Province, China, and reports the genital butt structure comparable to that of some modern advanced algae and the fossil structure comparable to the dehiscence of sporangia as well as the ontogenetic phenomenon occurring possibly from the formation of embryos by zygote germination to the production of sessile benthonic algal adults. This phenomenon furnishes a useful clue to the further study of the life history of alternate generations in advanced algae and provides megafossil evidence for the sex differentiation of metaphytic algae.

关键词： Doushantuo' an stage metaphyte fossil reproductive structure alternation of generations Xiuning Anhui

Provenance of Central Canyon in Qiongdongnan Basin as evidenced by detrital zircon U-Pb study of Upper Miocene sandstones

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science China Earth sciences 2015年第8期58卷 1337-1349,1-6页

作者： CHEN Hui XIE XiNong GUO JingLiang SU Ming ZONG KeQing shang fei HUANG Wei WANG Wei shang ZhiLei Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education Faculty of ResourcesChina University of Geosciences State Key Laboratory of geological Processes and Mineral Resources China University of Geosciences Key Laboratory of Renewable Energy and Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of Sciences China National Offshore Oil Corporation Research institute

Deep-water canyon systems can provide important sandstone reservoirs for deep-water oil and gas exploration in the South China Sea;however,the sedimentary provenance of the Central Canyon in the Qiongdongnan Basin remains *** this work,detrital zircon grains from three drilling sandstones in the Upper Miocene Huangliu Formation in the western part of the Central Canyon were analysed by LA-ICP-MS for U-Pb ages,in order to constrain their *** hundred and ninety-one zircon grains yield concordant U-Pb ages ranging from 28.6 to 3285 *** of them show oscillatory or linear zoning in CL-images and high Th/U ratios(>0.1),suggesting that they are magmatic *** major age clusters at about30 Ma(N=6),220–270 Ma(N=29),and 420–440 Ma(N=13),and five minor age clusters at 70–110 Ma(N=7),150–170 Ma(N=4),800–850 Ma(N=11),1800–2000 Ma(N=16),and 2400–2600 Ma(N=7),can be identified in the age spectrum,which are very similar to those of the Upper Miocene sandstones and modern river sands in the Red River area,but different from those of other nearby regions(e.g.,Hainan Island,the Pearl River area,and the Mekong River area)in Southeast *** major age peak at about 30 Ma in our samples is consistent with the timing of tectonothermal events in the Red River Fault ***,we suggest that the provenance of the western part of the Central Canyon,in the Qiongdongnan Basin,was fed dominantly by the Paleo-Red River system during the Late Miocene.

关键词： Qiongdongnan Basin Central Canyon detrital zircon U-Pb dating LA-ICP-MS sedimentary provenance

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农田荒漠过渡带包气带土壤水盐运移规律研究

科学技术与工程 2022年第20期22卷 8640-8645页

作者：崔尚进刘鹏飞聂振龙朱谱成中国地质科学院水文地质环境地质研究所石家庄050061 自然资源部地下水科学与工程重点实验室石家庄050061

为实现农田区作物和农田荒漠过渡带保护区植被协同发展,通过石羊河流域下游某试验场原位试验研究灌溉后农田荒漠过渡带包气带土壤水盐运移规律。结果表明:农田荒漠过渡带上,荒漠区土壤包气带水盐运移与农田区灌溉息息相关。灌溉后,农田... 详细信息

为实现农田区作物和农田荒漠过渡带保护区植被协同发展,通过石羊河流域下游某试验场原位试验研究灌溉后农田荒漠过渡带包气带土壤水盐运移规律。结果表明:农田荒漠过渡带上,荒漠区土壤包气带水盐运移与农田区灌溉息息相关。灌溉后,农田区土壤盐分随灌溉水进入地下水中,继而流向荒漠区,引起荒漠区表层土壤盐分大幅升高。水位调控后,灌溉对农田区表层土壤脱盐效果更好,盐分随灌溉水向下运移更深。同时,农田区侧向流入荒漠区盐分减少,而且减少了浅层咸水进入荒漠区包气带土壤中的盐分,有效缓解了荒漠区表层土壤聚盐效应。

关键词：农田荒漠过渡带包气带土壤水盐运移水位调控

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水位调控下微咸水灌溉后包气带水盐运移特征

科学技术与工程 2022年第3期22卷 967-973页

作者：崔尚进刘鹏飞聂振龙朱谱成耿新新中国地质科学院水文地质环境地质研究所石家庄050061 自然资源部地下水科学与工程重点实验室石家庄050061

为缓解西北干旱区灌溉压力和浅层水咸化问题,通过石羊河流域下游某试验场原位试验研究水位调控和微咸水灌溉双重条件下的包气带水盐运移规律。结果表明:水位调控能起到减蒸抑盐作用,随灌溉水电导率增加抑盐效果减弱。微咸水灌溉后,水位... 详细信息

为缓解西北干旱区灌溉压力和浅层水咸化问题,通过石羊河流域下游某试验场原位试验研究水位调控和微咸水灌溉双重条件下的包气带水盐运移规律。结果表明:水位调控能起到减蒸抑盐作用,随灌溉水电导率增加抑盐效果减弱。微咸水灌溉后,水位调控可以减弱盐分在浅层的积累。因此,对于淡水资源短缺、土壤盐渍化和浅层水咸化区域,灌溉期可以采用水位调控和微咸水结合的灌溉方式,不仅缓解了深部淡水资源的使用压力,而且改善了微咸水灌溉后浅层土壤盐渍化问题。

关键词：包气带水盐运移微咸水灌溉水位调控石羊河流域

华北平原典型区不同砂层井灌中水位水量变化差异特征——以滹沱河冲洪积扇藁城段为例

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科学技术与工程 2023年第2期23卷 502-508页

作者：刘鹏飞刘少玉周晓妮王哲张光辉崔尚进中国地质科学院水文地质环境地质研究所石家庄050061 中国地质大学(北京) 北京100083 自然资源部地下水科学院与工程重点实验室石家庄050061

井灌作为地下水超采区治理中应用的一种重要回灌方式,具有占地面积小回灌效率高的优势,但不同砂层中回灌水入渗特征不同。基于华北平原典型区砂层特征,通过研发井灌仿真扇体砂箱模型,开展粗中细3种砂层中不同定水位、定流量条件下的室... 详细信息

井灌作为地下水超采区治理中应用的一种重要回灌方式,具有占地面积小回灌效率高的优势,但不同砂层中回灌水入渗特征不同。基于华北平原典型区砂层特征,通过研发井灌仿真扇体砂箱模型,开展粗中细3种砂层中不同定水位、定流量条件下的室内井灌实验,综合对比分析井灌过程中水量与水位的时空变化数据。结果表明:定水位稳定井灌条件下,沿水流方向粗中细砂介质中的水位均呈降低趋势,粗砂中降幅最小,细砂中最大;粗中细砂介质中的水位降低过程均可分为快速和慢速两段,分界点距井壁越来越近。定流量井灌条件下,随井内水位增长,粗中砂介质中回灌流量呈二次方增长,细砂介质中呈线性增长,粗砂中回灌流量大小对水位变化的响应最明显。井灌过程包含井周边储水、向远处扩散然后趋于稳定的过程,粗中砂介质中储水和扩散过程较快,达到稳定回灌用时约600 s;细砂介质中储水和扩散过程较慢,达到稳定回灌用时约9500 s。研究对开展地下水人工回灌工程选址、回灌砂层优选及回灌井布局优化具有一定的指导意义。

关键词：华北平原井灌不同砂层水位水量差异特征指示意义