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Pre-Cryogenian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 899-918页

作者： peiyuan hu Qingguo ZHAI Guochun ZHAO Peter A.CAWOOD Yue TANG Yiming LIU Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Sciences University of Hong KongPokfulam RoadHong Kong 999077China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China School of Earth Atmosphere&EnvironmentMonash UniversityMelbourneVIC 3800Australia

The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinents on Earth.This paper systematically summarizes the characteristics of pre-Cryogenian sedimentation,paleontology,magmatism,and metamorphism in the Tibetan Plateau and its surrounding areas.Based on existing data,the records of pre-Cryogenian sedimentation and paleontology are mainly concentrated in the Meso-Neoproterozoic,with relatively few records from the Paleoproterozoic or earlier.The oldest geological record is the Hadean detrital zircons in the metamorphosed sedimentary rocks of the Himalaya and Qamdo areas(ca.4.0 Ga).The Tibetan Plateau and surrounding areas preserve records related to the formation and evolution of the Kenor supercraton,and the Columbia,Rodinia,and Gondwana supercontinents.Pre-Cryogenian basements can be divided into three types:Tarim-,Yangtze-,and Lhasa-type.The Tarim-type basement has a paleogeographic affinity with the northern margins of the Australian and Indian continents and lacks detrital zircon age peaks and magmatic-metamorphic records related to the Rodinia assembly(ca.1.3-0.9 Ga).The Yangtze-type basement records volcanic activity related to global cooling in the latest pre-Cryogenian period and contains Meso-Neoproterozoic stromatolite and micropaleoflora fossils,as well as magmaticmetamorphic records related to Rodinia assembly(ca.1.1-1.0 Ga).The Lhasa-type basement is characterized by Neoproterozoic rift-related sediment records(ca.900 Ma)and high-pressure metamorphic events(ca.650 Ma),with a prominent peak of detrital zircon ages of ca.1.2-1.1 Ga.It is likely to have a paleogeographic affinity with the African continent.

关键词： Tibetan Plateau Pre-Cryogenian Sedimentation Fossils Paleogeographic evolution

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电缆地层测试器探针模块常见故障分析

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油气井测试 2024年第2期33卷 27-31页

作者：宋彬胡沛源中海油田服务股份有限公司天津300459 中国石油长庆油田分公司工程技术部陕西西安710021

现有的电缆地层测试器探针模块故障统计归类和解决方案混乱,不利于制定电缆仪器维修保养标准化策略。通过梳理电缆设备的故障类型,针对电路故障、机械装配故障、电装工艺故障、电化学腐蚀故障逐一分析,提出具体解决方案;建立科学的三级... 详细信息

现有的电缆地层测试器探针模块故障统计归类和解决方案混乱,不利于制定电缆仪器维修保养标准化策略。通过梳理电缆设备的故障类型,针对电路故障、机械装配故障、电装工艺故障、电化学腐蚀故障逐一分析,提出具体解决方案;建立科学的三级保养制度,把易磨损的部位放在一级保养里面,按照PM1执行;把易污染的液压件放在二级保养里面,按照PM2执行;其余部位按照PM3执行。经过出海作业120余井次验证,设备可靠性有了极大提升。该分析从根源上有效管控了故障,做到了提前预防,对此类型仪器维保具有借鉴意义。

关键词：地层测试器探针模块故障统计离散分布精准定位三级维保标准化

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传承与创新视角下的金农“漆书”字库字体及延展应用设计

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包装工程 2024年第2期45卷 241-251页

作者：胡衍谨张培源山东工艺美术学院济南250300

目的分析金农“漆书”的审美特征,并应用到当代汉字设计中,使所设计的字库产品既有金农书法的金石气韵,又符合当代的应用语境,以此促进金农“漆书”艺术的传承和字库风格多元化的发展。方法从诸多博物馆调研金农“漆书”作品并分析整... 详细信息

目的分析金农“漆书”的审美特征,并应用到当代汉字设计中,使所设计的字库产品既有金农书法的金石气韵,又符合当代的应用语境,以此促进金农“漆书”艺术的传承和字库风格多元化的发展。方法从诸多博物馆调研金农“漆书”作品并分析整理,以南京博物院典藏金农“漆书”作品《盛仲交小传》为蓝本,其他作品为参考,从分析造型中的点、横、竖、撇、捺、折、钩等笔画元素入手,凝练与总结“漆书”视觉符号和文化内涵;除了遵循字库字体的基本原则外,还运用“完全复现法”“旧字新构法”“异字结合法”“形意合一法”的创新与传承性的原则与方法,对提取的元素进行重构、融合、创新,最后结合用户思维的研发策略进行设计应用。结论结合金农“漆书”书法元素进行字库字体设计,可以提升字库产品的文化内涵与价值,让人们更多地了解金农的“漆书”艺术,有利于书法艺术传承与创新,有助于探讨解决书法艺术与当代字体设计之间的矛盾关系,为书法艺术在字库字体设计中的应用实践提供有益参考。

关键词：传承与创新金农“漆书” 字库字体设计延展应用

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Late Cretaceous High-Sr/Y Granitic Rocks in the Eastern Tibetan Plateau: Crustal Thickening During Continental Collision

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 19-20页

作者： hu peiyuan ZHAI Qingguo WANG Jun Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China

High-Sr/Y granitic rocks,characterized by intermediate–high SiO2 contents(>56 wt.%),high La/Yb ratios(>20),and low Y(<18 ppm)and Yb(<1.9 ppm)contents,have drawn much attention from geologists in the past decades.They were originally named adakites and defined as granitic magma in convergent plate margins formed by partial melting of subducted young(<25 Ma),hot,and hydrated oceanic slab.Recent studies suggest that these rocks can also be formed in a variety of non-subduction-related tectonic settings through different petrogenetic processes including partial melting of thickened lower continental crust,providing important constraints on crustal growth and evolution throughout the Earth’s history.The Tibetan plateau,generally considered as an archetype of collisional orogen,was formed by the successive accretion of different tectonic terranes to the southern margin of the Eurasia plates since the Early Paleozoic.Geologically,the Tibetan plateau comprises several W–E trending terranes(the Kunlun,North Qiangtang,South Qiangtang,and Lhasa terranes)and northernmost India(the Himalaya region).These terranes have undergone significant crustal thickening during the continental collision events.The crustal thickness of the Tibetan plateau is asymmetric,being thickest under the Lhasa terrane and thinning more gradually towards the north than to the south.From south to north,the crustal thickness increases from^50 km in the Himalaya region,to^70–80 km under the Lhasa terrane,and decreases to^65 km under the North and South Qiangtang terranes and^55 km beneath the Kunlun terrane.The present crustal thickness of the Tibetan plateau has generally been attributed to the Cenozoic collision between the Indian and Eurasian plates and the subsequent intracontinental convergences since^55 Ma.However,doubts were raised about this interpretion in the past few years.For example,recent studies indicated the crust of the Lhasa terrane had been significantly thickened during ca.140–130 Ma in response to the subduction of the Neo-Tethyan Oc

关键词： Tibetan plateau south Qiangtang terrane high-Sr/Y granitic rocks petrogenesis

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Petrology, Geochemistry and Tectonic Significance of the Metamorphic Peridotites from Longmuco-Shuanghu Ophiolitic Melange belt, Tibet

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Acta Geologica Sinica(English Edition) 2013年第2期87卷 426-439页

作者： WU Yanwang LI Cai XIE Chaoming WANG Ming hu peiyuan College of Earth Science Jilin University

Taoxinghu metamorphic peridotite is a firstly reported mantle sequence of ophiolite since Longmuco-Shuanghu-Lancangjiang suture zone （LSLSZ） was proposed, and it is also an important discovered for ophiolite studying in central Qiangtang. Based on detailed analyses of whole-rock geochemistry of Taoxinghu metamorphic peridotites and contrast to metamorphic peridotites in typical ophiolites worldwide, the paper investigates their petrogenesis and geological implication. The petrologic results show that the protolith of Taoxinghu metamorphic perdotites have the mineral assemblage and texture characteristic of mantle peridotite. Most metamorphic peridotites hav near global abyssal peridotites major elements contents, while the few is similar to SSZ-type peridotites. They exhibit typically U-shaped REE patterns, characterized by slight enrichment of LREE and HREE relative to MREE and a low fractionated LREE to HREE segment. Trace elements contents are low and all samples are strong enrichment in Cs, U, Pb, weak enrichment in Ba and depletion in Th, but negative Nb anomalies are only observed in few samples. That suggests Taoxinghu metamorphic peridotites have depletion mantle and suprasubduction affinities. A two-stage evolution history is considered： Taoxinghu metamorphic peridotites originated as the residue from melting at a ridge with 7%-20% degree of fraction melting and were subsequently modified by interaction with mafic melt and aqueous fluid within mantle wedge on subducted zone. Combined with previous studies, we preliminarily propose Taoxinghu metamorphic peridotites may be the Products of initial rifting of palo-Tethys, forming at middle Ordivician-upper Cambrian, and they may be the direct evidences for spreading of palo-Tethys.

关键词： geochemistry metamorphic peridotite Taoxinghu Longmuco-Shuanghu suturezone Tibetan plateau

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Late Cambrian to Early Silurian Granitic Rocks of the Gemuri Area, Central Qiangtang, North Tibet: New Constraints on the Tectonic Evolution of the Northern Margin of Gondwana

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Acta Geologica Sinica(English Edition) 2020年第4期94卷 1007-1019页

作者： WANG Haitao ZHAI Qingguo hu peiyuan ZENG Lingsen TANG Yue Zhu Zhicai Key Laboratory of Deep–Earth Dynamaics of the Ministry of Nature Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China

The Paleozoic tectonic framework and paleo–plate configuration of the northern margin of Gondwana remain controversial. The South Qiangtang terrane is located along the northern margin of Gondwana and records key processes in the formation and evolution of this supercontinent. Here, we present new field, petrological, zircon U-Pb geochronological, and Lu-Hf isotopic data for granitic rocks of the Gemuri pluton, all of which provide new insights into the evolution of the northern margin of Gondwana. Zircon U-Pb dating of the Gemuri pluton yielded three concordant ages of 488.5 ± 2.1, 479.9 ± 8.9, and 438.5 ± 3.5 Ma. Combining these ages with the results of previous research indicates that the South Qiangtang terrane records two magmatic episodes at 502–471 and 453–439 Ma. These two episodes are associated with enriched zircon Hf isotopic compositions(εHf(t) =-10.1 to-3.9 and-16.6 to-6.5, respectively), suggesting the granites were formed by the partial melting of Paleoproterozoic–Mesoproterozoic metasedimentary rocks(Two–stage Hf model ages(TCDM) = 2094–1704 and 2466–1827 Ma, respectively). Combining these data with the presence of linearly distributed, contemporaneous Paleozoic igneous rocks along the northern margin of Gondwana, we suggest that all of these rocks were formed in an active continental margin setting. This manifests that the two magmatic episodes within the Gemuri area were associated with southward subduction in the Proto-(Paleo-) Tethys Ocean.

关键词： granitic rocks Early Paleozoic South Qiangtang Tibet Gondwana

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The Ren Co MOR-type Ophiolite in the North-central Tibetan Plateau: A Fast-spreading Ridge Segment of the Meso-Tethys Ocean?

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 57-57页

作者： TANG Yue ZHAI Qingguo hu peiyuan XIAO Xuchang Key Laboratory of Deep-Earth Dynamics of the Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijingChina 100037

The Meso-Tethys Ocean is generally considered to have opened in the late Early Permian as a result of the Cimmerian continental block drifting away from the Gondwana supercontinent. This ocean is also termed the north branch of the Neo-Tethys Ocean, and is now represented by the Bangong–Nujiang suture zone in the north-central Tibetan plateau. However, it is still unknown for the evolutionary history for as such a huge ancient ocean basin. Ophiolites are remnants of oceanic lithosphere and preserve key information in rebuilding the evolutionary history of ancient oceans. In this study, we undertook detailed geological mapping for the Ren Co ophiolite in the middle part of the Bangong–Nujiang suture zone, and a typical Penrose-type ophiolite sequences was newly documented in the Ren Co area. The Ren Co ophiolite comprises serpentinized peridotite, cumulate rock, gabbro/diabase, sheeted dike, massive and pillow lavas, and minor red chert. These rocks exhibit well-preserved mantle and crust rock suites, and show close similarities to oceanic lithospheres at modern fast-spreading ridges. Zircon U–Pb dating for gabbro and plagiogranite yielded ages of 169–147 Ma, which suggest that the Ren Co ophiolites were formed during the Middle to Late Jurassic. Harzburgite in the Ren Co area shows similar features to those of abyssal peridotite indicating the residues of the oceanic mantle. Mafic rocks(basalt, diabase and gabbro) of the Ren Co ophiolite show geochemical features similar to those of typical N-MORB. Moreover, all samples have positive whole-rock εNd(t), and zircon εHf(t) and mantle-like δ18O values. These features suggest that these rocks were derived from a depleted mantle source, thus the Ren Co ophiolite was typical MOR-type ophiolite. We suggest that the Ren Co ophiolite was formed in a fast-spreading mid-ocean-ridge(MOR) setting, and they most likely represented the ridge segment of the BangongNujiang Meso-Tethys Ocean. The Bangong–Nujiang MesoTethys Ocean was a wide paleo-ocean, and experienced continuous oc

关键词： Meso-Tethys Ocean Bangong–Nujiang suture zone MOR-type ophiolite mid-ocean-ridge segment

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Arc-trench System of the Paleo-Tethys Ocean: Inferred from Ophiolite in the Southern Lancangjiang Belt, SW China

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 79-79页

作者： ZHAI Qingguo TANG Yue hu peiyuan JIN Xiaochi WANG Jun WANG Haitao Key Laboratory of Deep-Earth Dynamics of the Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China

The Paleo-Tethys Ocean is usually interpreted as a Paleozoic ocean basin located between the Gondwana and Laurasia supercontinents. The Paleo-Tethyan orogenic record is well preserved in the Sanjiang area of SW China. However, ophiolites are commonly dismembered in orogenic belt, and complete ophiolite sequences are rare in the Sanjiang area. The southern Lancangjiang belt is the most complicated tectonic complex of the Sanjiang Paleo-Tethyan orogen, SW China, and is key to understanding the evolution of the orogen. In this study, we focused on mafic–ultramafic rocks in the Yakou and Banpo areas of the southern Lancangjiang belt, of which newly discovered Yakou rocks show a complete ophiolite sequence. These rocks are composed of serpentinized peridotite, isotropic and cumulate gabbros, massive and pillow basalts, and plagiogranite. Whole-rock geochemical data indicate that these rocks were formed in an oceanic ridge setting, and they show depletions in Nb, Ta and Ti, and enrichment in Pb, suggesting a supra-subduction zone affinity of a back-arc setting. Furthermore, positive εNd(t)(+4.5 to +6.7) and zircon εHf(t) values(+12.4 to +14.3), as well as mantle-like δ18O values(~5.5‰), suggest that these rocks were derived from a long-term depleted mantle source. All of these features suggest that the Yakou mafic-ultramafic complex represents an ophiolite suite, making it the first complete ophiolite sequence to be discovered in the southern Lancangjiang orogenic belt. The Banpo complex gabbroic rocks have similar whole-rock geochemical and Sr-Nd isotopic, and zircon O-Hf isotopic compositions to those of the Yakou complex, suggesting an N-MORB affinity. Thus, maficultramafic rocks from the Banpo and Jinghong areas are most likely dismembered ophiolite suites. Considering these various characteristics, we consider that the Yakou, Banpo, and Jinghong mafic-ultramafic complexes represent an ophiolite belt but not a magmatic arc belt. SHRIMP zircon U-Pb dating yield weighted mean ages of 305±3 Ma, 310±2 Ma, and 313±6 Ma.

关键词： ophiolite zircon U-Pb dating arc-trench system southern Lancangjiang belt Paleo-Tethys

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药物戒烟在中国恶性肿瘤一级预防中的卫生经济学评价

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中华肿瘤杂志 2024年第1期46卷 66-75页

作者：孙培元谢瑀婷郄然然黄璜胡卓伦吴梦瑶闫琪朱彩蓉石菊芳邹开勇张亚玮国家癌症中心、国家肿瘤临床医学研究中心、中国医学科学院北京协和医学院肿瘤医院预防控制部北京100021 四川大学华西公共卫生学院流行病与卫生统计学系、四川大学华西第四医院成都610044 国家癌症中心、国家肿瘤临床医学研究中心、中国医学科学院北京协和医学院肿瘤医院早诊早治办公室北京100021

目的对中国常见的戒烟药物干预策略进行成本效用分析, 以探究药物戒烟作为中国恶性肿瘤一级预防策略的卫生经济性。方法通过建立Markov队列模拟模型, 模拟10 000名35岁有戒烟意愿的人群采用多种药物戒烟策略的干预效果。模型共纳入12种... 详细信息

目的对中国常见的戒烟药物干预策略进行成本效用分析, 以探究药物戒烟作为中国恶性肿瘤一级预防策略的卫生经济性。方法通过建立Markov队列模拟模型, 模拟10 000名35岁有戒烟意愿的人群采用多种药物戒烟策略的干预效果。模型共纳入12种与吸烟相关的恶性肿瘤, 分别为肺癌、口腔癌、鼻咽癌、喉癌、食管癌、胃癌、胰腺癌、肝癌、肾癌、膀胱癌、宫颈癌和髓系白血病。以1年为循环周期, 模拟时长为50个周期, 评价指标采用增量成本效用比(ICER), 意愿支付阈值为1倍人均国民生产总值。通过单因素敏感性分析、概率敏感性分析、分年龄组敏感性分析方法评估结果的稳定性。结果成本效用分析结果显示, 采用伐尼克兰干预最具成本效用优势。与次优干预方案(盐酸安非他酮缓释片)相比, 每增加1个质量调整生命年的增量成本为11 140.28元, 低于意愿支付阈值。随着接受干预人群年龄增大, 增量成本效用比值逐渐增大, 但在所有年龄段组别中ICER值均未超过意愿支付阈值, 伐尼克兰干预在各个年龄段均具有最佳经济学优势。单因素敏感性分析结果显示, 贴现率、伐尼克兰干预药物的成本以及干预成功风险比对结果影响较大。结论在中国采用伐尼克兰药物进行恶性肿瘤一级预防戒烟干预具有较强的卫生经济性, 且干预对象越年轻, 卫生经济优势越明显。

关键词：恶性肿瘤戒烟伐尼克兰恶性肿瘤一级预防 Markov模型药物经济学成本-效用分析

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Synthesis of NaYF_(4):20% Yb^(3+),2% Er^(3+),2% Ce^(3+)@NaYF_(4) nanorods and their size dependent uptake efficiency under flow condition

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Journal of Rare Earths 2022年第10期40卷 1519-1526页

作者： Dongmei Qiu Jie hu peiyuan Wang Decai huang Yaling Lin Haina Tian Xiaodong Yi Qilin Zou Haomiao Zhu Fujian Normal University Fuzhou350007China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen361021China College of Materials Science and Engineering Huaqiao UniversityXiamen 361021China Research Center of Biomedical Engineering of Xiamen&Key Laboratory of Biomedical Engineering of Fujian Province&Fujian Provincial Key Laboratory for Soft Functional Materials Research Department of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005China Centre D’Elaboration de Mat eriaux et D’Etudes Structurales(CEMES) CNRSUniversit e de Toulouse-UPS29 Rue Jeanne MarvigBP 9434731055ToulouseCedex 4France

Lanthanide doped fluorescent nanoparticles have gained considerable attention in biomedical applications.However,the low uptake efficiency of nanoparticles by cells has limited their applications.In this work,we demonstrate how the uptake efficiency is affected by the size of nanoparticles under flow conditions.Using the same size NaYF_(4):20%Yb^(3+),2%Er^(3+),2%Ce^(3+)(the contents of rare earths elements are in molar fraction)nanoparticles as core,NaYF_(4):20%Yb^(3+),2%Er^(3+),2%Ce^(3+)@NaYF_(4) core-shell structured nanorods(NRs)with different sizes of 60-224 nm were synthesized by thermal decomposition and hot injection method.Under excitation at 980 nm,a strong upconversion green emission(541 nm,^(2)H_(11/2)→^(4) I_(15/2) of Er^(3+))is observed for all samples.The emission intensity for each size nanorod was calibrated and is found to depend on the width of NRs.Under flow conditions,the nanorods with 96 nm show a maximum uptake efficiency by endothelial cells.This work demonstrates the importance of optimizing the size for improving the uptake efficiency of lanthanide-doped nanoparticles.

关键词： Uptake efficiency Endothelial cells Upconversion luminescence Cell imaging Rare earths

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