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Geochronology and Geochemical Characteristics of the Early Mesozoic Tangquan Pluton in Southwestern Fujian and Its Tectonic Implications

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Acta Geologica Sinica(English Edition) 2003年第3期77卷 361-371页

作者： mao jianren, hu qing,{2., xie fanggui and tao kuiyuan, nanjing institute of geology and Mineral resources, nanjing, jiangsu 210016 E-mail: mjrmh@*** Hao Ziguo and Zhu Xiling nanjing Inst Geol & Mineral resources Nanjing 210016 Jiangsu Peoples R China

The Tangquan granodioritic pluton in Dalian County, southwestern Fujian, China, which extends in a NE direction with an exposed area of about 130 km2. used to be considered a product of Early Cretaceous magmatism. The present study suggests for the first time that the pluton was formed in the Early Jurassic by using multiple methods for isotopic dating, which give zircon U-Pb ages of 186.8 Ma and 179.0 Ma, Rb-Sr isochron age of 162.02.4.5 Ma, and biotite 40Ar/39Ar plateau age of 158.1±0.7 Ma. The cooling rate for the pluton was relatively low (4.76℃/Ma) during the early stage (183-162.Ma) because of the compressional environment. It was emplaced in a higher cooling rate (50℃/Ma) in an extensional environment during the later stage (162.158 Ma). The granodiorites are metaluminous-peraluminous, relatively enriched in Na2. and depleted in K2., and characteristic of I-type granites of crust-mantle mixed sources. They are moderately enriched in Rb, Th, Hf and LREE, and depleted in Ti, Nb, Ta and Sr, and have geochemical features of cal-alkaline rocks of an island arc or active continental margin. Their (87Sr/86Sr)i ratio varies from 0.70769 to 0.7082., εNd(t) from -9.68 to -10.07 and TDM from 1.52.to 1.55 Ga. They were formed by mixing of mantle-derived mafic magma with the granitic magma resulting from partial melting of crust-derived materials in an upwelling of the asthenospheric mantle in South China during the Early Mesozoic.

关键词： granodiorite Early Jurassic petrogenesis tectonic setting southwestern Fujian China

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Isotopic Geochronology of the Xianghongdian Alkaline Complex, Northern Margin of the Dabie Mountains, China

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Acta Geologica Sinica(English Edition) 1999年第4期73卷 404-410页

作者： YANG Zhuliang SHEN Weizhou SHEN Jialin tao {2. xie fanggui nanjing institute of {2. and Mineral resources 210016 Nanjing Department of Earth Sciences Nanjing University 210093 Nanjing

To the north of the Qinling-Dabie orogen there exists a Mesozoic (K1) granite-syenite belt called the Beihuaiyang granite-syenite belt, in which the Xianghongdian alkaline complex outcrops in the Devonian Foziling schist and also intruded into the slightly earlier volcanic rocks. This alkaline complex is composed of syenite, alkaline syenite and nepheline syenite, but the nepheline syenite occurs inside the alkaline syenite in the pod-like, irregular, lenticular or layered shape. Researches on the petrogenesis of the alkaline complex and the relationship between the alkaline syenite and the nepheline syenite must rely on precise isotopic ages. Previous researches have reported isotopic dating results merely by the 40Ar/39Ar method on hornblende and biotite separated from the alkaline syenite and nepheline syenite. In view of this, the authors have made fairly detailed isotopic geochronological studies of the alkaline syenite and nepheline syenite by using Rb-Sr isochron for the whole rock and minerals, U-Pb for single zircon separate and the 40Ar/39Ar method for hornblende and potash feldspar. The results of this research are completely different from those of previous researches and show that the nepheline syenite was formed far earlier than the alkaline syenite.

关键词： isotopic geochronology alkaline complex Xianghongdian Dabie Mountains China

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双金属复合管环焊缝耐蚀性能评价方法

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石油与天然气化工 2024年第1期53卷 104-109页

作者：钟洋毛汀黄洪发曾德智罗涛杨廷加汪枫胡梅中国石油西南油气田公司天然气研究院油气藏地质及开发工程国家重点实验室·西南石油大学中国石油西南油气田公司天然气净化总厂中国石油西南油气田公司输气管理处

目的建立双金属复合管环焊缝耐蚀性能评价方法,为双金属复合管在高酸性气田现场应用提供依据。方法针对双金属复合管环焊缝在高酸性环境中的主要腐蚀类型,参考标准Q/SY 06018-2.16中冶金复合管直焊缝和堆焊层腐蚀评价内容,确定以晶间腐... 详细信息

目的建立双金属复合管环焊缝耐蚀性能评价方法,为双金属复合管在高酸性气田现场应用提供依据。方法针对双金属复合管环焊缝在高酸性环境中的主要腐蚀类型,参考标准Q/SY 06018-2.16中冶金复合管直焊缝和堆焊层腐蚀评价内容,确定以晶间腐蚀、抗SCC/SSC性能、点腐蚀、模拟工况腐蚀为评价指标,并通过整管段试验验证评价结果的双金属复合管环焊缝耐蚀性能评价方法,同时以国产L360/82.冶金复合管环焊缝为例对建立的评价方法进行验证。结果通过使用建立的方法对L360/82.双金属复合管环焊缝耐蚀性能进行评价,验证了评价方法有效可靠,评价结果显示L360/82.双金属复合管环焊缝具有良好的耐蚀性能。结论建立的评价方法可以直接应用于高酸性气田用双金属复合管的环焊缝耐蚀性能评价,为双金属复合管的现场应用提供依据。

关键词：双金属复合管环焊缝耐蚀性能高酸性气田

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巷道掘进过程煤岩破裂微震信号多参量监测研究

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地球物理学进展 2024年第2期39卷 818-827页

作者：马涛王亚娟刘宁马磊毛俊睿运城职业技术大学智能制造与数智矿山学院运城044031 西安科技大学安全科学与工程学院西安710054 河南理工大学河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地焦作454000

为揭示深部矿井巷道掘进过程煤岩动力现象发生“前-中-后”的矿震显现规律,以潞安五阳煤矿巷道掘进为研究背景,利用ESG微震监测技术,对作业过程煤岩扰动及地应力变化引起的微震事件进行实时监测,并通过快速傅里叶变换(FFT)、小波包变换... 详细信息

为揭示深部矿井巷道掘进过程煤岩动力现象发生“前-中-后”的矿震显现规律,以潞安五阳煤矿巷道掘进为研究背景,利用ESG微震监测技术,对作业过程煤岩扰动及地应力变化引起的微震事件进行实时监测,并通过快速傅里叶变换(FFT)、小波包变换、S变换对作业过程中微震信号的时序、频谱和能量进行分析,构建微震多参量监测模型,得出如下结论:(1)监测期间发生微震事件的日累计频次及日累计频次变化率具有先上升后下降的趋势,主震发生当日出现日累计频次及变化率极大值;(2.一般事件、前兆事件和后震事件的微震信号振幅和能量均低于主震事件,但持续时间为主震信号的2.4倍,主震事件发生时,微震事件振幅达到峰值,信号频域向低频段移动;(3) 4类微震事件小波包能量整体呈现下降的趋势,第1频带和第16频带分别对应为极大值和极小值点,小波包频带能量以1~3频带为主,主震信号16频带能量所占百分比仍处于较高点,说明主震事件后期仍残存微震能量,工作面并不会马上进入安全期;(4)提出了微震多参量分析方法,构建了以时序S、时域T、频域F和小波包频带能量E为参数的4×4微震多参量监测模型,提高微震监测的准确性和可靠度.研究结果可为矿井煤岩动力灾害事故的预测和预警提供技术支持,为该类型矿井提前感知微震活动,及时响应预防措施提供理论依据.

关键词：煤岩动力频谱小波包变换 S变换多参量监测

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海相页岩与陆相页岩体积压裂支撑剂敏感性差异机理探讨

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工程地质学报 2024年第4期32卷 1281-1291页

作者：李关访李晓李守定赫建明张召彬胡彦智郑博毛天桥陶亮孙宝才中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室北京100029 中国石油长庆油田分公司油气工艺研究院西安710018 中石化中原石油工程有限公司井下特种作业公司濮阳457160

页岩体积压裂是储层在地应力与致裂压力联合作用下形成天然裂缝与压裂裂缝相互交错的复杂缝网,现场实践表明这个复杂的缝网破裂演化过程中海相、陆相页岩储层对不同粒径的支撑剂注入具有明显的敏感性差异。通过海陆相页岩露头剖面地质... 详细信息

页岩体积压裂是储层在地应力与致裂压力联合作用下形成天然裂缝与压裂裂缝相互交错的复杂缝网,现场实践表明这个复杂的缝网破裂演化过程中海相、陆相页岩储层对不同粒径的支撑剂注入具有明显的敏感性差异。通过海陆相页岩露头剖面地质调查、钻井取芯对比分析岩体结构性差异,分析海相、陆相页岩水平井水力压裂施工数据,结合位移间断边界元裂缝网络演化模拟(DFN),揭示海相与陆相页岩体积压裂支撑剂敏感性差异机理。结果表明:陆相页岩呈岩性互层结构,多种岩体结构面发育,具有高度的结构非均质性特征;在相似的工况条件下,支撑剂随高压流体注入陆相页岩储层地面采集压力波动幅度较大,支撑剂对陆相页岩敏感性强于对海相页岩敏感性;海相页岩与陆相页岩岩体结构性差异导致水力压裂过程中的起裂行为、拓展机制、缝网形态的差异化机制,天然裂隙、弱结构面越发育,相同注入条件下压裂液滤失量大缝内净压力越低,水力裂缝平均开度越小;天然裂隙与最大水平主应力夹角越大,水力裂缝沟通天然裂隙之后转向至最大水平主应力方向扩展,转向段裂缝开度越小,容易引起支撑剂聚集沉降,从而造成支撑剂敏感性强。该研究对陆相页岩储层压裂方案优化具有一定现实指导意义。

关键词：海相页岩陆相页岩水力压裂支撑剂敏感性差异机理

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Exceptionally Preserved Conodont Natural Assemblages from the Middle Triassic Luoping Biota,Yunnan Province,China:Implications for Architecture of Conodont Feeding Apparatus

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Journal of Earth Science 2023年第6期34卷 1762-1776页

作者： Jinyuan huang Carlos Martinez-Perez Qiyue Zhang Kexin Zhang mao Luo Wen Wen Changyong Zhou Xiao Min Zhixin Ma {2. xie Michael J.Benton Philip C.J.Donoghue Chengdu Center China Geological Survey(Geosciences Innovation Center of Southwest China)Chengdu 610081China Cavanilles institute of Biodiversity&Evolutionary Biology University of Valencia46980 ValenciaSpain institute of Geological Survey China University of GeosciencesWuhan 430074China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China School of Ocean Sciences China University of GeosciencesBeijing 100083China School of Earth Sciences University of BristolBristol BS81TQUK

Articulated natural assemblages contain direct evidence of the element numbers,morphologies,positions and structures for reconstructing the feeding apparatuses of conodont animals,but these kind of materials are very rare in fossil *** we report ten new conodont natural assemblages from Member II of the Guanling Formation in Luoping County,eastern Yunnan Province,southwestern *** assemblages were obtained from the fossil-bearing layers of the Luoping Biota,dated to the early Middle Triassic Anisian stage(Pelsonian substage).These fossiliferous laminated limestones mainly consist of calcites and dolomites,with platy clay minerals and pyrites as subordinate components,indicating that the conodont assemblages were preserved in a lower energy and anoxic sedimentary *** new natural assemblages preserve the primary collapse orientations of the Nicoraella feeding apparatus from the Luoping Biota,showing the relative original positions of the S,M and P elements,that could be further used to refine the architecture of this apparatus in space variable M elements and the position unclear P1 *** previously reported three-dimensional and bilaterally symmetrical fused clusters,we statistically analyze the size of the positional homogenous elements within different sized materials,in particular S4,S3,or S2.elements,indicates that elements ontogenic changes do not affect the apparatus *** of Nicoraella apparatus remains stable in the process of ontogeny,so our reconstructed model is *** is the first time that ample types of materials have been used to restore a conodont apparatus within one genus,namely natural assemblages(articulated and disarticulated),fused clusters(articulated,disarticulated,compressed,and relatively three-dimensional),and abundant discrete elements,*** materials together record the most complete information on architecture in the gondolelloid apparatuses,thus enabling us

关键词： conodont natural assemblage architecture fused cluster size variation limestone MiddleTriassic southwestern China

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西秦岭大水金矿围岩蚀变作用与金的成矿关系

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甘肃地质 2024年第1期33卷 17-25页

作者：南银仓王滔毛艳丽李林积黄从俊甘肃省地矿局第三地质矿产勘查院甘肃兰州730050 中国地质调查局成都地质调查中心四川成都610081 甘肃省金矿资源勘查利用技术创新中心甘肃兰州1730050

大水金矿围岩蚀变强烈,且具有多阶段性,蚀变类型主要有硅化、赤铁矿化、碳酸盐化等。本文通过对大水金矿床中碳酸盐矿物地球化学特征、稳定同位素特征及磁铁矿与赤铁矿间转化关系研究,结合等浓度图法等方法,对矿床的围岩蚀变与金的成矿... 详细信息

大水金矿围岩蚀变强烈,且具有多阶段性,蚀变类型主要有硅化、赤铁矿化、碳酸盐化等。本文通过对大水金矿床中碳酸盐矿物地球化学特征、稳定同位素特征及磁铁矿与赤铁矿间转化关系研究,结合等浓度图法等方法,对矿床的围岩蚀变与金的成矿关系进行了探讨。结果表明:矿床中各阶段方解石的碳质均来自中三叠统马热松多组(T_(2.m)碳酸盐地层的去碳酸盐化作用;赤铁矿化是在非氧化还原模式下,由于磁铁矿中Fe^(2.)被淋滤带出而形成的。结论认为:大水金矿床并非形成于氧化环境,去碳酸盐化—硅化+金矿化—方解石化是连续—完整的蚀变矿化过程,去碳酸盐化及赤铁矿化增加了围岩的孔隙度和渗透率,加速了成矿流体的运移与水岩反应速率;金矿化与硅化、赤铁矿化关系密切。

关键词：西秦岭大水金矿床围岩蚀变金矿化成因类型

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A Simulation of the Mid-and Low-latitude Ionospheric Electric Fields

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空间科学学报 2014年第3期34卷 287-295页

作者： YU tao mao Tian XIA C{2.nliang WAN Weixing National Satellite Meteorological Center China Meteorological Administration China University of Geosciences institute of geology and Geophysics Chinese Academy of Sciences

A theoretical model of ionospheric electric fields at mid-and low-latitudes is *** the geomagnetic dipolar coordinate system,the ionospheric dynamo equations were solved,and the ionospheric electric potential and electric field were derived *** parameters for the model inputs,such as the neutral winds,the densities and temperatures of electron,ions and neutrals,are obtained from empirical *** global ionospheric electrical potential and field at mid-and low-latitudes derived from our model are largely in agreement with the results presented by other authors and the empirical *** our model,it is found that the diurnal component of the HWM93 wind mainly contributed to the formation of the vertical electric field,while the semidiurnal component mainly contributed to the zonal electric ***,by adjustment of the input F region winds and conductivities,most discrepancies between our model and the empirical one can be eliminated,and it is proved that the F region dynamo is the most significant contribution to the electric fields.

关键词： Ionosphere dynamo Simulation Tides Zonal electric field evening enhancement

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岩溶洞穴救援体系构建研究——以贵州省为例

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中国岩溶 2024年第2期43卷 476-490页

作者：罗书文吴克华贺卫罗时琴周文龙毛永琴杨桃李坡张远海邓亚东刘宇炫 Jean Botazzi 张弘智钱治王德远贵州省山地资源研究所贵州贵阳550001 贵州省喀斯特洞穴(旅游)资源开发利用工程技术研究中心贵州贵阳550001 贵阳十二中学贵州贵阳550002 中国地质科学院岩溶地质研究所广西桂林541004 贵州洞穴协会贵州贵阳550001

完善的岩溶洞穴救援体系、促进岩溶地区体育产业和旅游行业发展,对岩溶洞穴旅游具有重要现实意义。文章通过对国外洞穴救援成果及洞穴救援手册分析洞穴救援要素,结合我国救援主体和洞穴救援技能特性以及贵州实际,构建贵州洞穴救援组织... 详细信息

完善的岩溶洞穴救援体系、促进岩溶地区体育产业和旅游行业发展,对岩溶洞穴旅游具有重要现实意义。文章通过对国外洞穴救援成果及洞穴救援手册分析洞穴救援要素,结合我国救援主体和洞穴救援技能特性以及贵州实际,构建贵州洞穴救援组织架构及救援响应机制。依据贵州洞穴发育特征和洞穴事故发生概率及性质,部署贵州洞穴救援力量。根据我国救援体制和洞穴救援人员技能需求及其分布特性,建立统一指挥平台和洞穴救援专家库(消防队洞穴救援专家,洞穴协会会员洞穴救援专家),实现指挥中心统一调度,政府与社会力量共同作战。完善的洞穴救援体系有利于合理利用资源,实现洞穴救援有序高效实施。

关键词：岩溶洞穴洞穴救援救援体系洞穴安全贵州绳索技术

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SHRIMP zircon U-Pb dating for volcanic rocks of the Dasi Formation in southeast hubei Province,middle-lower reaches of the Yangtze River and its implications

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Chinese Science Bulletin 2006年第24期51卷 3000-3009页

作者： xie Guiqing {2. Jingwen LI Ruiling ZHOU Shaodong YE huishou YAN Quanren ZHANG Zusong State Key Laboratory of Geological Processes and Mineral resources China University of Geosciences Beijing 100083 China institute of Mineral resources Chinese-Academy of Geological Sciences Beijing 100037 China institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China No. 4 Geological Party of hubei Province Xianning 437100 China institute of geology Chinese Academy of Geosciences Beijing 100037 China Southeast hubei Geological Party of hubei Province Daye 435100China

The Jinniu Basin in southeast hubei,located at the westernmost part of middle-lower val-ley of the Yangtze River,is one of the important vol-canic basins in East China. Volcanic rocks in the Jin-niu Basin are distributed mainly in the Majiashan Formation,the Lingxiang Formation and the Dasi Formation,consisting of rhyolite,basalt and basaltic andesite,(trachy)-basalt and basaltic trachy-andesite and (trachy)-andesite and (trachy)-dacite and rhyolite respectively,in which the Dasi volcanism is volumet-rically dominant and widespread. The Dasi volcanic rocks were selected for SHRIMP zircon U-Pb dating to confirm the timing of volcanism. The results indi-cate that there exist a large amount of magmatic zir-cons characterized by high U and Th contents in the volcanic rocks. The concordia ages for 13 points are 12. ± 1Ma (MSWD = 3.0). On account of the shape of zircons and Th/U ratios,this age is considered to represent the crystallization time of the Dasi volcan-ism. The volcanic rocks in the Dasi,Majiashan and Lingxiang Formations share similar trace elementand REE partition patterns as well as Sr-Nd isotopic compositions. In combination with the regional geol-ogy,it is proposed that the southeast hubei volcanic rocks were formed mainly during the Early Creta-ceous,just like other volcanic basins in middle-lower Yangtze valley. A lithospheric extension is also sug-gested for tectonic regime in this region in the Cre-taceous Period.

关键词：火山岩 SHRIMP锆石U-Pb测年湖北东南部地质构造年代学长江中下游地区

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