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Chinese Journal of Aeronautics 2020年第1期33卷 161-175页

作者： jinghui guo Guiping LIN Xueqin BU Hao LI Laboratory of Fundamental Science on Ergonomics and Environmental Control School of Aeronautic Science and EngineeringBeihang UniversityBeijing 100083China

Implementation of an opposing jet in design of a hypersonic blunt body significantly modifies the external flowfield and yields a considerable reduction in the aerodynamic *** study aims to investigate the effects of flowfield modeling parameters of injection and freestream on the flow structure and aerodynamics of a blunt body with an opposing jet in hypersonic ***-Averaged Navier-Stokes(RANS)equations with a Shear Stress Transport(SST)turbulence model are employed to simulate the intricate jet flow *** utilizing a Non-Intrusive Polynomial Chaos(NIPC)method to construct surrogates,a functional relation is established between input modeling parameters and output flowfield and aerodynamic quantities in *** indices in sensitivity analysis are introduced to represent the relative contribution of each *** is found that variations in modeling parameters produce large variations in the flow structure and *** jet-to-freestream total-pressure ratio,jet Mach number,and freestream Mach number are the major contributors to variation in surface pressure,demonstrating an evident location-dependent *** penetration length of injection,reattachment angle of the shear layer,and aerodynamic drag are also most sensitive to the three crucial parameters *** comparison,the contributions of freestream temperature,freestream density,and jet total temperature are nearly negligible.

关键词： Aerodynamics Flow structure Hypersonic flow Opposing jet Sensitivity analysis Surrogate model

Sm-Nd age dating of high-pressure granulites and amphi-bolite from Sanggan area,North China craton

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Chinese Science Bulletin 2001年第2期46卷 106-111页

作者： jinghui guo Mingguo Zhai Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

The high pressure (HP) metamorphic age has been dated to HP rocks from the Sanggan area, North China craton. We have got garnet+whole rock isochron ages of (1 842±38) Ma for HP granulite, and (1 856± 26) Ma for HP amphibolite. The Sm-Nd whole rock isochron of HP granulites give out an age of (1870±150) Ma with Nd depleted mantle model age of (2402-2 482) Ma. Considering the Nd isotope homogenization during the peak metamorphism of the HP granulite, Sm-Nd closure temperature and the retention of Nd isotopic memory in garnets partially broken down during decompression, all these isochron ages are thought to be HP metamorphic age. Furthermore, we proposed that the HP metamorphism took place at the end of Paleoproterozoic during the large-scale collision and assembly of the North China craton.

关键词： Sm-Nd dating high pressure granulite Paleoproteroz-oic collision North China craton.

A possible relict mantle wedge: Geochemical evidence from Paleogene volcanics in North China

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Chinese Science Bulletin 2001年第22期46卷 1917-1922页

作者： Bolin Cong jinghui guo Wenjun Liu Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

The major and trace element and isotopic composition were analyzed for the Paleogene volcanics in North China dated by the K-Ar method. The geochemical data show that most volcanics are in calc-alkaline series and the minor is in alkaline series. They differ obviously from Neogene and Quaternary volcanics in geochemistry. In particular, the Paleogene volcanics from the southern part of North China were derived from enriched lithospheric mantle (EMU), which were likely to be a relict mantle wedge formed during the subduction of the Yangtze plate into the North China plate in late Triassic (Indo- Sinian).

关键词： volcanics relict mantle wedge geochemistry Paleogene North China.

Evolution, Migration, Controlling Factors and Forming Setting of Mesozoic Basins in Western Shandong

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Acta Geologica Sinica(English Edition) 2005年第4期79卷 519-532页

作者： ZHANG Zhongyi WU Ganguo guo jinghui ZHANG Da Key Laboratory of Lithospheric Tectonics and Lithoprobing Technology Ministry of Education University of Geosciences Beijing 100083 Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029

The distinctive topography in western Shandong province consists of several NW-WNW-trending mountain ranges and intervening basins. Basins, in which late-stage sediments to the south have progressively overlapped the earlier sediments and ＂basement＂ rocks of the hanging-wall block, are bounded by S-SW-dipping normal faults to the north. Basin analysis reveals the Jurassic-Cretaceous sedimentary rocks accumulated both within the area of crustal extension and during extensional deformation; they contain a record of a sequence of tectonic events during stretching and can be divided into four tectonic-sequence episodes. These basins were initially developed as early as ca. 200 Ma in the northern part of the study area, extending dominantly N-S from the Early Jurassic until the Late Cretaceous. Although with a brief hiatus due to changes in stress field, to keep uniform N-S extensional polarity in such a long time as 130 Ma requires a relatively stable tectonic controlling factor responsible for the NW- and E-W-extensional basins. The formation of the extensional basins is partly concurrent with regional magmatism, but preceded magmatism by 40 Ma. This precludes a genetic link between local magmatism and extension during the Mesozoic. Based on integrated studies of basins and deformation, we consider that the gravitational collapse of the early overthickened continental crust may be the main tectonic driver for the Mesozoic extensional basins. From the Early Jurassic, dramatic reduction in north-south horizontal compressive stress made the western Shandong deformation belt switch from a state of failure under shortening to one dominated by extension and the belt gravitationally collapsed and horizontally spread to the south until equilibrium was established; synchronously, the normal faults and basins were developed based on the model of simple-shear extensional deformation. This may be relative to the gravitational collapse of the Mesozoic plateau in eastern China.

关键词： Mesozoic basin basin analysis extension gravitational collapse western Shandong

Re-Os isotopic constraint to the age of in komatiites in the Neoarchean Guyang greenstone belt,North China Craton

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Chinese Science Bulletin 2010年第27期55卷 3197-3204页

作者： MA XuDong guo jinghui CHEN Liang CHU ZhuYin State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China

The 2.5 Ga Guyang greenstone belt is a major lithological unit in the northwestern part of the North China *** have recently been identified to occur within the lower part of the meta-volcanic sedimentary sequence of the greenstone *** biggest komatiite near Guyang has been mapped out,which is 500 m long and 50 m wide lenticular ***-Os isotopic compositions of 9 samples were analyzed to date the *** Os contents are from 0.88 to 2.63 ppb,identical with typical komatiites,and slightly lower than the normal *** 187Os/188Os ratios are from 0.1115 to 0.1197,which are lower enough to exclude the origin of Phanerozoic magma as widely developed in adjacent *** calculated Re depletion model ages(TRD) are from 1346 to 2454 Ma,among them the oldest age of 2454 Ma gives the minimum evaluation for the formation age of the Guyang ***,the komatiites are a part of the Guyang greenstone belt,indicating high degree melting of mantle during～2.5 Ga crustal growth event.

关键词：科马提岩中国西北部同位素组成形成年龄固阳县绿岩带克拉通新太古代

Crustal growth at ～2.5 Ga in the North China Craton:evidence from whole-rock Nd and zircon Hf isotopes in the Huai'an gneiss terrane

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Chinese Science Bulletin 2009年第24期54卷 4704-4713页

作者： LIU Fu guo jinghui LU XiaoPing DIWU ChunRong State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Regional Geological and Mineral Resources Survey of Jilin Province Changchun 130022 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China

Huai'an 片麻岩岩层主要由 TTG 片麻岩和 dioritic 片麻岩组成。在 magmatic 锆石核心标明日期的 situ U-Pb 的激光显示这些片麻岩的 protolith 在 ∼2.5 Ga 被形成。TTG 片麻岩有积极 ε 2.7 ～ 4.3 的 Nd (t) 价值，和大多数 magmatic... 详细信息

Huai'an 片麻岩岩层主要由 TTG 片麻岩和 dioritic 片麻岩组成。在 magmatic 锆石核心标明日期的 situ U-Pb 的激光显示这些片麻岩的 protolith 在 ∼2.5 Ga 被形成。TTG 片麻岩有积极 ε 2.7 ～ 4.3 的 Nd (t) 价值，和大多数 magmatic 锆石有积极 ε 2.0 ～ 8.3 的 Hf (t) 价值。这些积极 ε Nd (t) 和 ε Hf (t) 价值两个都类似于在 2.5 Ga 的同时期的弄空的披风的那些。而且，为 magmatic 锆石的 2.44 ～ 2.73 Ga 的年轻 Hf 模型年龄接近预定锆石生长。整个岩石的 ε Nd (t) 价值由于在它的来源的古老的外壳的参与比在 TTG 片麻岩在 dioritic 片麻岩(0.8 ～ 1.7 ) 是更低的。然而，从 dioritic 片麻岩的许多 magmatic 锆石有类似的 ε Hf (t) 价值(2.0 ～ 7.9 ) 到同时代的弄空的披风的；他们 2.49 ～ 2.75 Ga 的 Hf 模型年龄接近锆石的 U-Pb 年龄。最高的 ε Hf (t) 价值接近弄空的披风，和相对高的 ε Hf (t) 价值对应于相对年轻的 Hf 模型年龄。这些 Nd 和 Hf 同位素特征建议 Huai'an 片麻岩岩层的片麻岩的这二种类型在 ca 从少年外壳发源。2.5 Ga。

关键词：锆石Hf同位素地壳生长片麻岩 Nd 淮安地体克拉通全岩

Origin and geological significance of the 1.81 Ga hyalophane-rich pegmatite veins from the high-pressure granulite terrain in the Central Zone of North China Craton

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Science China Earth Sciences 2012年第2期55卷 193-203页

作者： QU Min guo jinghui LAI Yong PENG Peng LIU Fu State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of EducationPeking UniversityBeijing 100871China

Hyalophane-rich pegmatites are identified from the Manjinggou high-pressure granulite terrain in the Central Zone of North China Craton. Based on field investigation, mineral assemblage and mineral geochemistry, two types of pegmatites can be defined, i.e., hyalophane pegmatite and hyalophane-rich pegmatite. The hyalophane pegmatite is composed of pure hyalophane with 18.7 mol%-19.4 mol% celsian, whereas the hyalophane-rich pegmatite consists of clinopyroxene + titanite + epidote + hyalophane with 11.9 mol%-12.5 mol% celsian. Hyalophane-rich pegmatite has typical magmatic zircons with oscillatory zoning and high Th/U ratios, implying that this type of pegmatite crystallized from special melt similar to magma. SIMS (Cameca 1280) zircon U-Pb dating shows that the crystallization age of the hyalophane-rich pegmatite is 1812±5 Ma, younger than the regional metamorphic age (peak of ca. 1.85 Ga). Zircon δ18O (8.0 ‰-9.3 ‰) and ?Hf (-7.0 to-2.7) values measured by SIMS suggest that the high-pressure granulite terrain was the source of these veins. Therefore, the hyalophane-rich pegmatite veins were likely to be generated by melting of the high-pressure granulite terrain during post collisional uplift. A quick tectonic uplifting process with a velocity of 0.4 to 0.6 mm/a has been estimated for the high-pressure granulite terrane from the Central Zone of North China Craton.

关键词： hyalophane pegmatite zircon Hf-O isotope high-pressure granulite Paleoproterozoic North China Craton

Constraints on the Ediacaran-Cambrian boundary in deep-water realm in South China: Evidence from zircon CA-ID-TIMS U-Pb ages from the topmost Liuchapo Formation

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Science China Earth Sciences 2020年第8期63卷 1176-1187页

作者： Wei WANG Mingzhong ZHOU Zhuyin CHU Junjie XU Chaofeng LI Taiyi LUO jinghui guo State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China School of Geographical and Environmental Sciences Guizhou Normal UniversityGuiyang 550001China:China University of GeosciencesBeijing 100083China:State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550002China

The placement of the Ediacaran-Cambrian boundary in deep-water realm in South China and the high-precision temporal framework for the Ediacaran-Cambrian transition in this region have not yet been completely solved. Recently, we have found two K-bentonite beds in the top of the Liuchapo Formation at the Pingyin section, Guizhou Province. It provides an opportunity for constructing the temporal framework of the transitional strata on the Yangtze Platform in South China and for determining the Ediacaran-Cambrian boundary in this area. In this study, we conducted high-precision CA-ID-TIMS U-Pb dating on zircons from the two K-bentonites. The ages of the two K-bentonites were precisely constrained at 536.40±0.47/1.1/1.2 Ma(2σ, n=7, MSWD=0.92) and 541.48±0.46/1.1/1.2 Ma(2σ, n=8, MSWD=1.3). Combining the geochronological results with organic carbon isotope data of chert in the topmost Liuchapo Formation from the section, we suggest that the EdiacaranCambrian boundary should be consistent with a significant negative organic carbon isotope excursion between the two Kbentonites. The scheme of the Ediacaran-Cambrian boundary in this study is of great significance for global correlation, and further for unravelling the information of the terminal Ediacaran-early Cambrian ocean.

关键词： Liuchapo Formation Yangtze Platform Ediacaran-Cambrian CA-ID-TIMS Organic carbon isotope

Fluid inclusions in whiteschist in the ultrahigh-pressure metamorphic belt of Dabie Shan,China

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Chinese Science Bulletin 2002年第12期47卷 1028-1032页

作者： Hongrui Fan Jingbo Liu jinghui guo Kai Ye Bolin Cong Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

Hualiangting whiteschist in the Dabie Shan ultrahigh-pressure eclogite complex is a specific Mg-Al-rich metamorphic rock. Its protolith was a felsic dyke, which suffered replacement by high-pressure fluids during ec-logite-facies metamorphism. Based on fluid inclusion results in whiteschist, primary high-pressure fluids are CO2-bearing aqueous solutions. Those prove that there exists CO2-H2O fluid during the ultrahigh-pressure metamorphism. Pseu-dosecondary H2O inclusions were trapped during ultra-high-pressure exhumation, whereas secondary H2O inclusions were related to the latest evolutionary stage of the ultrahigh-pressure exhumation.

关键词： fluid inclusion whiteschist ultrahigh-pressure Dabie Shan.

Petrologic indicators of prograde metamorphism in Paleoproterozoic garnet mafic granulites from the Huai＇an complex, North China Craton

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Science Bulletin 2018年第2期63卷 81-84页

作者： Jialin Wu Mingguo Zhai Huafeng Zhang jinghui guo Haozheng Wang Wenqiang Yang Hong Zhang Bo Hu School of Earth Science and Resources Chang'an University Xi'an 710054 China Key Laboratory of Computational Geodynamics University of Chinese Academy of Sciences Beijing 100049 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 China

Reconstruction of pressure-temperature-time(P-T-t)paths and thermal regimes are essential for inferring tectono-metamorphic processes involved in the formation of metamorphic ***,the P-T information,especially the prograde evolution is generally preserved incompletely due to the fast intra-or inter-grains diffusion under *** may result

关键词：天体建筑群石榴石指示物岩石学变态中国顺时针