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锆石SHRIMP U-Pb定年

锆石SHRIMP U-Pb定年的相关文献在2005年到2021年内共计119篇,主要集中在地质学、天文学 等领域,其中期刊论文113篇、会议论文6篇、专利文献82261篇;相关期刊23种,包括大地构造与成矿学、岩石学报、中国地质等; 相关会议3种,包括第十届全国矿床会议、2007'全国岩石学与地球动力学暨化学地球动力学研讨会、2007中亚型造山与成矿国际学术研讨会等;锆石SHRIMP U-Pb定年的相关文献由484位作者贡献,包括吴才来、孙桂华、戚学祥等。

锆石SHRIMP U-Pb定年—发文量

期刊论文>

论文:113 占比:0.14%

会议论文>

论文:6 占比:0.01%

专利文献>

论文:82261 占比:99.86%

总计:82380篇

锆石SHRIMP U-Pb定年—发文趋势图

锆石SHRIMP U-Pb定年

-研究学者

  • 吴才来
  • 孙桂华
  • 戚学祥
  • 李锦轶
  • 刘敦一
  • 柏道远
  • 王德贵
  • 颉颃强
  • 万渝生
  • 夏斌
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 李亚东; 江小均; 柳永清; 李超; 孙会一; 芦磊
    • 摘要: 钱家营子岩体位于赤峰—围场—白云鄂博断裂以北白乃庙岛弧带上,为兴蒙造山带南缘构造-岩浆岩带的重要组成部分,其时代及成因对理解中亚造山带构造格局及地质演化过程具有重要意义.本文在1:25万区域地质调查基础上,对钱家营子黑云母二长花岗岩体进行岩相学、锆石SHRIMP U-Pb年代学、Hf同位素组成特征开展综合研究.结果表明,岩体的锆石206Pb/238U加权平均年龄为(247.2±4.7)Ma,指示其形成于早三叠世末期.176Hf/177Hf值为0.282298~0.282371,对应的 εHf(t)值为–8.7~–11.4,其两阶段模式年龄变化在1.60 Ga到1.74 Ga之间,表明钱家营子黑云母二长花岗岩母岩浆可能来源于古元古代华北板块加厚下地壳的部分熔融.综合岩体地球化学特征及区域相关研究,认为内蒙古正蓝旗钱家营子地区在早三叠世处于兴蒙造山带和华北板块后造山(碰撞)的伸展环境.
    • 纪宏伟; 牛子良; 东前; 张闯
    • 摘要: 红山子铀钼矿床位于华北陆块北缘的沽源-红山子铀多金属成矿带和西拉沐沦钼多金属成矿带上,该矿床内发现有发育在花岗斑岩内的辉钼矿化.通过对辉钼矿进行Re-Os同位素测定,获得模式年龄为(137.2±3.2)Ma和(138.2±2.1)Ma,对围岩花岗斑岩锆石进行SHRIMP U-Pb同位素测定,获得成岩年龄为(133.1±1.2)Ma.两种方法获得的年龄相近,表明成矿和成岩大致同时形成,均属早白垩世.另辉钼矿的Re含量为(186.6~216.8)×10-6,表明该钼矿化的成矿物质来自于地幔.通过与西拉沐沦钼多金属成矿带的典型矿床开展综合分析,认为红山子铀钼矿床的发育在花岗斑岩内的钼矿化具有斑岩型钼矿化特征,且应属该成矿带的138 Ma成矿期,该矿化是在白垩纪华北克拉通岩石圈减薄的大地构造背景下,由地幔组分与岩石圈作用形成的岩浆携带地幔含矿流体上侵而形成的钼矿化.
    • 叶现韬; 张传林
    • 摘要: 塔里木克拉通前寒武纪构造演化,特别是早前寒武纪构造演化一直是地质学家讨论的焦点.本文通过对阿尔金北缘新太古代TTG片麻岩进行详细的野外调查、岩相学观察、地球化学分析以及锆石SHRIMP U-Pb定年来揭示该岩石的成因以及探讨塔里木克拉通早前寒武纪构造演化.锆石SHRIMP U-Pb定年结果显示阿尔金北缘TTG片麻岩的形成年龄为2740±19Ma,而后经历了新太古代(2494 ±53Ma)混合岩化作用和古元古代(1962 ±78Ma)麻粒岩相变质作用.阿尔金北缘英云闪长质片麻岩显示低的MgO含量(1.33%~3.08%)和Mg#(37~52),具有高Sr(469 × 10-6~764 × 10-6)含量、低Y(4.72 ×10-6~13.5 ×10-6)和Yb(0.37 ×10-6~0.99 × 10-6)含量的特点,它们的Sr/Y比值可达到41~99.岩石的这些特征与基性下地壳部分熔融形成的TTG相同.并且,该新太古代TTG片麻岩还具有正的εNd(t)值(0.2~3.6)、高的Nd同位素初始值(0.509088~0.509260)和古太古代两阶段模式年龄(3.62~3.70Ga).因此,阿尔金北缘新太古代TTG片麻岩可能来源于基性下地壳部分熔融,并且岩浆源区有石榴石、角闪石和金红石的残留.综合前人的研究成果,对比相邻区域TTG的形成时代,变质事件的记录以及太古宙地壳增生差异都指示阿尔金北缘和敦煌-库鲁塔格地区可能来源于不同的大陆块体.
    • 刘典波; 王小琳; 张恒; 石成龙
    • 摘要: 华北克拉通燕辽地区是中国中新元古代沉积地层的标准剖面区.蓟县群和青白口群已经取得了很多重要的高精度定年数据,但是长城群除了顶部大红峪组有了高精度定年以外,其他组还缺乏可靠的高精度定年数据.为了准确标定华北克拉通中元古界长城群串岭沟组的年龄,对采自河北宽城地区神仙岭剖面串岭沟组顶部火山岩凝灰岩锆石进行了SHRIMP U-Pb定年.结果 表明所测锆石207Pb/206Pb表面年龄加权平均值为(1 634.8±6.9) Ma(95%置信度,MSWD=1.2,n=23).可见长城群串岭沟组顶部的准确年龄为(1 634.8±6.9) Ma,表明长城群串岭沟组到大红峪组整体上属于中元古代地层.
    • 骆念岗; 王彬娜; 刘显成; 洪秀伟; 于波涛; 李庆
    • 摘要: 华北克拉通东部辽东地区出露古元古代侵入岩,为准确认识辽东地区古元古代构造演化过程,选取北沟岩体、正岔岩体和树柳林子岩体的岩相学、岩石地球化学及年代学特征,探讨了岩体的形成时代、岩石成因及其构造环境.锆石SHRIMP U-Pb年代学研究表明,柳林子岩体年龄为(2 490±8)Ma,北沟岩体年龄为(2 457±11) Ma.北沟岩体高硅富钾,富集Rb、U、Th、K等大离子亲石元素,亏损Nb、Ti、P等高场强元素,为过铝质高钾钙碱性Ⅰ型花岗岩,Nb/Ta平均值5.75,Rb/Nb平均值4.21,源于太古宙古老地壳的部分熔融;正岔岩体高硅富钾,富集Rb、Ba、U、Th、K等大离子亲石元素,亏损Nb、Ti、P等高场强元素,为弱过铝质高钾钙碱性A型花岗岩,Nb/Ta平均值16.06,Rb/Nb平均值4.81,源区可能由幔源岩浆底侵带来的热量加热地壳,导致其重熔并与之混合后形成的.柳林子岩体为变质角闪辉长岩,呈亚碱性,富集Rb、Ba、K等大离子亲石元素,亏损Nb、Ti、P等高场强元素,显示其岩浆可能形成于受陆壳微弱混染的软流圈地幔或岩石圈地幔.认为研究区古元古代侵入岩形成于东、西陆块碰撞拼合后的后造山挤压向板内伸展转换的构造环境,为构造体质转换的产物.
    • 范飞鹏; 李少斌; 林耿伟; 周霞; 肖凡; 肖惠良; 陈乐柱; 李海立; 蔡逸涛; 康丛轩; 朱意萍; 刘建雄; 邓中林
    • 摘要: 鸿沟山矿区位于华南粤东莲花山钨矿床的中部,是近年来通过地质矿产调查新发现具有找寻金矿潜力的矿床之一.本文以与鸿沟山金等多金属矿化关系密切的流纹斑岩为研究对象,开展了锆石SHRIMP U-Pb定年、流纹斑岩和矿石岩石地球化学、锆石Lu-Hf同位素组成特征研究.获得流纹斑岩锆石206Pb/238U加权平均年龄为169.1±1.5Ma,说明岩体形成于中侏罗世.在微量元素特征方面,流纹斑岩都表现为相对亏损大离子亲石元素Ba、Sr和高强场元素Nb、P、Zr、Hf,富集大离子亲石元素Rb,高强场元素U、Ce、Sm和轻稀土元素La、Nd,流纹斑岩与矿石稀土元素特征基本相似,Eu具中等负异常,但随着矿化强度的增强稀土元素更加富集.流纹斑岩εHf(t)(-15.0~2.2)分布范围宽,二阶段模式年龄TDM2主要变化范围为0.82~0.93 Ga,表明成岩物质主要来源于新元古代古老地壳变质泥岩和变质砂岩部分熔融,并有幔源物质的加入.因此,围绕着该时间段的流纹斑岩岩体,对于找寻W、Cu、Pb、Zn、Bi、Au、稀土、稀有和稀散元素矿产具有重要意义.%High precision geochronological data of gold related rock mass are less in the eastern Guangdong Province.And studying the rhyolitic porphyry related to gold—polymetallic mineralization will be very important for understanding the evolution of volcanic rocks and the relationship between volcanic rocks and gold mineralization.The Honggoushan rhyolitic porphyry is closely related to gold—polymetallic mineralization,which is in the central part of Lianhuashan tungsten deposit,eastern Guangdong Province,South China.It is a newly discovered gold deposit in recent years that having gold prospecting potential.On the basis of field geological investigation,we choose the typical rhyolitic porphyry and mineralization of samples in order to detailed study on the Honggoushan ore block.Zircon U-Pb age analysis for rhyolitic porphyry weighted average 206Pb/238U age was 169.1 ± 1.5Ma.Trace element characteristics show that the porphyritic granite depleted in Ba,Sr,HF elements Nb,P,Zr,Hf,and enriched in Rb,HF elements U,Ce,Sm and La,Nd.Rhyolitic porphyry has similar rare earth elements characteristics with ore with Eu moderate negative anomaly.However,with the increase of mineralization intensity,REE is more enriched.The eHf(t) values of rhyolitic porphyry constraint widely(-15.0~2.2).Moreover,the ages of second stage is between 1.946Ga and 2.788Ga.Rhyolitic porphyry formed in the middle Jurassic,materials sources mostly derived from the partial metling of Paleoproterozoic,and Neoarchean crustal metamorphic shale and sandstone with the input of mantle-derived magma.Therefore,it is a great significance to focus the research on the mid-Jurassic rhyolite porphyry for the discovery of W,Cu,Pb,Zn,Bi,Au,rare earth,rare and dispersed elements of mineral resources.
    • 朱乔乔; 谢桂青; 韩颖霄
    • 摘要: Shizilishan Sr (Pb-Zn) deposit is one of the important super-large strontium deposits in China,and is developed along the contact zone between Triassic evaporite strata (Jialingjiang Formation) and the Shizilishan stock (mainly as quartz diorite porphyry),which is located at the eastern margin of the Tieshan pluton,Edong district.In this paper,the relationship between the quartz diorite porphyry and the ore-forming process,as well as the chronology of quartz diorite porphyry are studied.The results show that Shizilishan stock probably had a close relationship with the strontium mineralization and some of the strontium in the deposit may come from the strong alteration of the quartz diorite porphyry.Zircon SHRIMP U-Pb dating shows that two quartz diorite porphyry samples reveal 138.6 ± 0.8Ma and 138.9 ± 1.2Ma,respectively,which were basically the same within error.Additionally,these ages are almost the same with Tieshan pluton,suggesting that they are highly reliable and the Shizilishan stock probably has same background with Tieshan pluton and both produced under the lithosphere tectonic switched from the Late Jurassic transpressive to earliest Cretaceous extensional regimes.Emplacement strata of the Shizilishan stock and distribution of sulfur isotopic composition of the deposit are similar to that of Chengchao and Jinshandian Fe skarn deposit,suggesting that there is potential to find Fe skarn deposit around the Shizilishan Sr (Pb-Zn) deposit.%湖北狮子立山锶(铅锌)矿床是我国重要的超大型锶矿床之一,产出于鄂东矿集区北部铁山岩体东缘的狮子立山岩体(主要为石英闪长玢岩)与三叠纪蒸发岩地层(嘉陵江组)的接触带或附近.本文对矿区内的石英闪长玢岩与成矿作用之间的关系和该岩体的年代学开展了详细的研究工作.结果表明,狮子立山岩体与锶矿成矿作用可能存在密切的联系,矿床中的部分Sr可能来自于石英闪长玢岩的强烈蚀变.锆石SHRIMP U-Pb的定年工作得到2个石英闪长玢岩样品的形成时代分别为138.6 ±0.8Ma和138.9±1.2Ma,二者在误差范围内基本一致,这些数据与前人获得的铁山岩体的成岩时代基本一致,暗示本次测得的石英闪长玢岩的样品年龄可靠性较高,且很可能与铁山岩体是同一地质背景下的产物,即形成于区域晚侏罗-早白垩世岩石圈由挤压到伸展的转换环境.狮子立山岩体的侵位地层及矿床中硫同位素组成的特征与程潮和金山店矽卡岩型铁矿具有明显的相似性,暗示在狮子立山矿床附近具有寻找矽卡岩型铁矿床的潜力.
    • 李源; 颉颃强; 宋志瑞
    • 摘要: 本文对赣东北樟树墩蛇绿混杂岩中基性—超基性岩的地球化学分析表明,其中辉长岩具有MORB的地球化学特征,蛇纹岩强烈亏损各微量元素.辉长岩的锆石SHRIMP O同位素分析结果给出了非常均一的O同位素组成(5.12‰±0.62‰,2σ),与地幔锆石的O同位素组成(5.3‰±0.3‰)接近.这些地球化学特征和其形成于大洋环境吻合.锆石SHRIMP U-Pb定年给出了辉长岩的形成年龄为1009±5 Ma(MSWD=1.15).在作为赣东北蛇绿岩的围岩张村岩群中,选取凝灰岩样品进行的锆石SHRIMP U-Pb定年给出了833±10 Ma(MSWD=1.5)的形成年龄,表明蛇绿岩就位时代晚于833 Ma.结合前人的研究,本文指出赣东北蛇绿岩形成于中元古代末—新元古代初的大洋中脊环境,不同于皖南伏川蛇绿岩所代表的弧后小洋盆环境.这些新资料为华南区域大地构造演化研究提供了新的约束.%Objectives:The fragmentary ophiolite fragments distributed in the Jiangnan (south Yangtze) orogenic belt have important geological significance for constraining the tectonic evolution of the Jiangnan orogen.Combined with petrological study and SHRIMP U-Pb zircon ages of the northeastern Jiangxi ophiolites and the Zhangcun Group,we briefly discuss the tectonic evolution of the Jiangnan orogen.Methods:Based on the field work,through the microscope observation,the whole rock chemical analysis,the the O isotopic analysis and SHRIMP U-Pb zircon dating of the Zhangshudun ophiolite and tuffaceous phyllite of of the Zhangcun Group.Results:The geochemical analyses of mafic—ultramafic rocks in the Zhangshudun ophiolite show that the gabbro yields the MORB-like geochemical composition and the serpentinite is strongly depleted in the trace elements.The SHRIMP O isotope analyses of zircons in gabbro yield homogeneous O isotope (5.12‰ ± 0.62‰,2σ),similar to the O isotope of zircons in mantle (5.3‰ ± 0.3‰).These geochemical characters support that these rocks represent remnants of ancient oceanic crust and upper mantle.SHRIMP U-Pb zircon analyses yields the formation age of 1009 ± 5 Ma (MSWD =1.15) for the gabbro in the Zhangshudun ophiolite.As the surrounding rocks of the Northeastern Jiangxi ophiolite,the formation age of the Zhangcun Group is constrained by the SHRIMP U-Pb zircon dating of a tuffaceous phyllite which yields the formation age of 833 ± 10 Ma (MSWD =1.5).This age suggests the emplacement of Northeastern Jiangxi ophiolite is later than 833 Ma.Conclusions:Combined with the early research,we suggest that the Northeastern Jiangxi ophiolite formed at the mid-ocean ridge environment in late-Mesoproterozoic to early-Neoproterozoic,different from the midNeoproterozoic back-arc basin represented by the Fuchuan ophiolite in the south Anhui province.These new data provide new constrains for tectonic evolution of South China.
    • 冉孟兰; 康志强; 许继峰; 付文春; 杨锋; 王保弟; 陈建林; 李强; 付伟
    • 摘要: 拉萨地块广泛分布中生代岩浆岩,研究它们对于认识特提斯洋的演化和理解整个青藏高原的形成过程有着重要意义.本文首次对拉萨地块南缘日喀则地区的比马组火山岩进行了系统的锆石SHRIMP U-Pb年代学、全岩主元素、微量元素及Sr-Nd同位素研究.结果表明,日喀则地区的比马组火山岩主要为中基性岩(玄武岩)及酸性岩(粗面安山岩,英安岩),精确的SHRIMP U-Pb定年获得了(177.9±2.5) Ma的年龄值,略晚于东部桑日县地区比马组火山岩.比马组火山岩整体属于低钾拉斑系列岩石,稀土元素分布模式表现为轻稀土元素富集右倾型,Eu显示弱的正异常,微量元素蛛网图显示岩石富集大离子亲石元素Th、U、Sr等,亏损高场强元素Nb、Ta、Ti等.岩石具有相对低的Sr同位素组成和高的εNd(t)值,(87Sr/86Sr)i值为0.703767~0.704886,εNd(t)值为5.28~6.37,显示典型的岛弧火山岩特征.认为日喀则比马组火山岩应为中生代时期新特提斯洋北向俯冲消减过程中导致亏损地幔楔部分熔融的产物,并受到了地壳的混染,形成时代上具有东早西晚的特点.%The Lhasa block features the widespread of Mesozoic magmatism,which is significant for understanding the evolution of the Neo-tethys and the whole history of the Tibetan plateau.This paper,for the first time,conducted a systematic study of the Bima Formation volcanic rocks in southern Lhasa block,Xigaze,Tibet,including zircon SHRIMP U-Pb dating,Sr-Nd isotopes,whole-rock major and trace elements.The results show that the Bima Formation volcanic rocks in the Xigaze region are dominated by mafic (including basalts,basaltic andesites) and acid rocks (dacite).Accurate SHRIMP U-Pb dating obtained an age of (177.9±2.5) Ma,slightly later than the formation age of the Bima Formation volcanic rocks in eastern Sangri region.The Bima Formation volcanic rocks belong to low potassium tholeiitic rocks series and are enriched in LREE,with a weak positive Eu anomaly.Their spider diagram is characterized by the enrichment of LILE Th,U,Sr,etc.and significant negative anomalies of HFSE Nb,Ta,Ti,etc.The samples have relatively low Sr isotopic compositions and high εNd(t)values,with (87Sr/86Sr)i value being (0.703767-0.704886),εNd(t) being (5.28-6.37),showing the typical characteristics of island-arc volcanic rocks.From the above discussion,we hold that the Bima Formation volcanic rocks resulted from partial melting of the mantle wedge during Neo-tethys northward subduction along the southern margin of the Lhasa Block,and were contaminated by the earth crust at the same time.
    • 王磊; 杨建国; 王小红; 齐琦; 谢燮
    • 摘要: 采用SHRIMP锆石U-Pb定年方法,首次获得大山头南出露的片麻状花岗闪长岩的206Pb/208Pb加权平均年龄为(386±6)Ma(MSWD=1.06),代表该岩体的成岩年龄,即大山头南花岗闪长岩岩体形成于中泥盆世.于此同时,首次获得了花岗闪长岩中部分继承锆石的年龄为(885土20)Ma(MSWD=1.18),该年龄是新元古代构造热事件的反映.该岩体成岩年龄介于其北侧的大山头超镁铁岩体(397±4)Ma和大山头南超镁铁岩体(374土3)Ma之间,结合研究区地质构造背景及前人研究成果,认为中晚泥盆世期间不仅有中酸性岩浆侵位,同时沿大断裂带也有部分镁铁-超镁铁岩侵位,中酸性岩体与镁铁-超镁铁岩体可能具有类似的地质背景,即它们均形成于后造山或同造山晚期阶段.%Using the SHRIMP zircon U-Pb dating methods,the diagenesisage of the Dashantounangranodiorite has been obtained for the first time.The obtained 206Pb/208 Pb weighted average age is (386-±-6) Ma (MSWD=1.06),standing for the Dashantounan granodiorite was formed in middle Devonian.At the same time,the inherited zircon age has been obtained for the first time,and the yielded age is (885-t-20) Ma (MSWD=1.18),whichserves as a reflection of the Neoproterozoic tectonic-thermal event.The diagenetic age between the age of Dashantourock mass (397±4) Ma and the ones of Dashantounan rock mass (374±3) Ma.After analyzing the previous research achievements,it's believed that themagmatic intrusionin the Middle-lateDevoniannot only includeintermediate-acidic magmas,but also include basic-ultrabasicmagma in the studying area.Theintermediate-acidic and basic-ultrabasicmagma might be formed in the same geologicalbackground,that is,theymight beformed in a post-orogenic extensional setting or a late-stage of syn-orogenic setting.
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