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40Ar/39Ar年代学

40Ar/39Ar年代学的相关文献在2000年到2021年内共计68篇,主要集中在地质学、地球物理学 等领域,其中期刊论文65篇、会议论文3篇、专利文献19247篇;相关期刊24种,包括大地构造与成矿学、岩石学报、地质通报等; 相关会议3种,包括2013年全国岩石学与地球动力学研讨会、第十二届全国有机地球化学学术会议、2006构造地质学新理论与新方法学术研讨会等;40Ar/39Ar年代学的相关文献由255位作者贡献,包括季建清、龚俊峰、李宝龙等。

40Ar/39Ar年代学—发文量

期刊论文>

论文:65 占比:0.34%

会议论文>

论文:3 占比:0.02%

专利文献>

论文:19247 占比:99.65%

总计:19315篇

40Ar/39Ar年代学—发文趋势图

40Ar/39Ar年代学

-研究学者

  • 季建清
  • 龚俊峰
  • 李宝龙
  • 彭头平
  • 王岳军
  • 王非
  • 韩宝福
  • 叶会寿
  • 周晶
  • 周江羽
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 王义天; 叶会寿; 刘俊辰; 郝建瑞; 张向卫; 郝蛟龙; 叶安旺
    • 摘要: 小秦岭金矿田位于华北克拉通南缘,同时也是秦岭复合型造山带的北缘组成部分.这里是我国第二大黄金产地,大规模金的成矿作用形成于早白垩世岩石圈大规模减薄的区域伸展构造背景.此外,越来越多的同位素年代学数据显示区内还存在三叠纪的成矿事件,发育钼、铅、铀、铌等与岩浆热液活动密切相关的多金属矿床,主要分布在小秦岭的南北边缘.目前,对于三叠纪多金属成矿作用的构造背景研究尚属薄弱,还没有直接对有关的构造变形开展过专题研究.为此,我们对小秦岭金矿田东端边缘的构造带进行构造观察和测量,并采用40Ar-39Ar年代学方法厘定变形时限,揭示三叠纪成矿事件的构造背景,为深入认识区内三叠纪多金属成矿作用特征和规律提供构造证据.研究表明,小秦岭金矿田三叠纪成矿事件发生于晚三叠世的伸展构造背景,可以划分为两个阶段,早期(221~216Ma)是在碰撞向后碰撞转折阶段的重力滑脱构造环境中,发育火成碳酸岩型钼铅、铀铌铅多金属矿床;晚期(214~203Ma)是在后碰撞阶段由俯冲板片断离或岩石圈拆沉作用等深部过程导致的区域伸展构造环境中,发育石英脉型和斑岩型钼矿床.小秦岭中生代晚三叠世和早白垩世两期成矿事件都是在伸展构造背景中的构造-岩浆-流体活动的产物.
    • 王兴安; 李世超
    • 摘要: 通过对中亚造山带东段南缘发育的解放营子韧性剪切带的构造学研究,揭示出该地区岩石圈减薄后发生了一期强烈的伸展变形事件.野外观测和岩相学分析显示该韧性剪切带呈北东-南西走向,变形带内发育有大量的A型褶皱,矿物和砾石拉伸线理以及同构造花岗质岩墙.S-C组构、σ型角闪石残斑、压力影构造、斜长石书斜构造以及云母鱼等显微构造,指示该韧性剪切带为右旋剪切.多晶石英的波状消光、晶粒边界迁移重结晶、多晶石英条带等显微变形组构表现出中温(300~500°C)的变形条件.动态重结晶颗粒的粒径统计分析和岩石有限应变分析显示该韧性剪切带形成于一个地壳中等层次的伸展变形环境.剪切带内同构造白云母40Ar/39Ar阶段加热同位素年代学分析以及同构造花岗岩的锆石U-Pb同位素年代学测试显示,该韧性剪切带的伸展变形时代为晚三叠世(219~227Ma).该期伸展变形事件在华北板块北缘和中亚造山带形成了低硅型和高硅型两种花岗质岩浆的侵入.其中中亚造山带内发育的低硅型岩石的岩浆源区为亏损型地幔岩石圈,并进一步演化出高硅型岩石;而华北板块北缘发育的低硅型岩浆起源于富集型岩石圈地幔,同时混入了亏损的软流圈地幔组分.
    • 郭尚宇; 黄锡强; 农军年; 何芝慧; 孙明行; 李伟; 谢植贵
    • 摘要: 博白?岑溪断裂带位于云开地块西侧,本文通过野外地质调查、有限应变测量、运动学涡度分析及40Ar-39Ar年代学研究定量查明了其北东段岑溪市三堡镇一带的韧性变形特征.研究表明三堡韧性剪切带付林指数K为0.07~0.60,罗德参数v为0.25~0.86,变形强度Es为0.34~0.73,属平面压扁型应变;运动学涡度值Wk为0.75~0.95,属以简单剪切为主的一般剪切;古差应力值σ为16.7~122.0 MPa;是在印支早期(231.9±2.2 Ma)造山环境,绿片岩相条件下形成的具右行走滑?逆冲性质的剪切带.这一成果为研究云开地区构造演化过程提供了新证据.
    • 宋东方; 肖文交; 韩春明; 田忠华; 李咏晨
    • 摘要: 北山造山带是诠释中亚造山带南缘增生构造过程的关键区域之一.北山中部变质杂岩及相关侵入岩经历了复杂变质变形作用,是解剖北山增生构造演化过程的关键.本文在详细野外观察基础上,结合显微构造变形和黑云母40Ar-39Ar年代学研究,厘定北山中部相关岩石的变质变形时限.北山中部岩石普遍经历了韧性剪切变形.4个样品的黑云母40Ar-39Ar坪年龄分别为323.1±3.6Ma、296.0±3.7Ma、261.2±3.1Ma和209.2±4.0Ma,具有自北向南逐渐变年轻的特征.结合区域上岩石大地构造单元的展布特征,这些年龄反映了北山中部地区古生代至早中生代古洋壳(牛圈子洋盆)向北俯冲、造山带往南增生的过程.北山最晚的增生造山事件可能延续到三叠纪.
    • 李睿华; 欧阳荷根; 赵财胜; 宋林山; 徐汉梁
    • 摘要: 近些年发现的斯如依迭尔铜多金属矿床有望改变南疆无大—中型铜矿的局面,对其研究意义显著.该矿床已圈定铜多金属矿体32条及众多矿化蚀变点,成矿前景乐观.矿床由南、北两矿段组成.北矿段主体由13个隐爆角砾岩体组成,隐爆角砾岩体内发育黄铜矿化;南矿段在花岗斑岩与围岩的接触带发育脉状黄铜矿化,岩体内部发育细脉状和浸染状黄铜矿化.上述地质特征表明,斯如依迭尔矿床为与花岗斑岩有关的斑岩型铜多金属矿床.对斯如依迭尔矿床成矿期的热液白云母进行40Ar/39Ar同位素测年,获得的坪年龄为13.68±0.17 Ma,表明矿床形成于中新世.结合前人的区域地质背景和构造演化研究结果,笔者认为斯如依迭尔铜多金属矿床的成矿地质背景与冈底斯中新世斑岩型铜金矿床的相同,均为印度板块同欧亚板块碰撞后的伸展环境.
    • 侯淋; 唐晓倩; 唐菊兴; 林彬; 宋扬; 王勤; 李玉彬; 冯军; 李彦波; 陈列
    • 摘要: The Dongwodong copper polymetallic deposit is located in the southern margin of Qiangtang terrane, east of the Duolong copper gold ore cluster.The study on the timing of alteration and element migration during the alteration has not yet been conducted.To determine the time of alteration, 40Ar-39Ar isotopic dating was carried out for altered sericites closely related to beresitizate mineralization.The results show that the plateau age is 122.20±0.84 Ma, which is consistent with the age (122 Ma) of ore-bearing porphyry.Thus, there is a close link between the mineralization and granodiorite porphyry.Meanwhile, the geochemical results of weakly-altered and mineralized granodiorite were compared, using the isocon equation and the derivation equation to judge the inclusion or extraction of each element and the element migration during the alteration.Results show that HFSEs are very immobile during the alteration, whereas REEs migrate insignificantly with more obvious migration of LREEs than HREEs.The ore-forming elements (Cu, Pb, Zn) are inclusion elements.The intrusive age of ore-bearing phophyries and the timing of hydrothermal alteration of Dongwodong deposit are consistent with those of other large-superlarge scale copper-gold deposits (Duobuza, Bolong, Tegelongnan) in Duolong copper gold ore cluster, indicating that they were controlled by the same tectonic-magmatic event and thus a great potential of ore-prospecting in Dongwodong mining district can be predicted.%东窝东铜多金属矿床位于羌塘地体南缘,多龙铜金矿集区东侧.该矿床尚未开展矿化蚀变时限、成矿作用中元素迁移特征等问题的研究.为确定矿床的蚀变矿化作用时限,本文对东窝东矿床的黄铁绢英岩化蚀变带中的蚀变绢云母进行了40Ar-39Ar年代学测试,获得40Ar-39Ar坪年龄为122.20±0.84 Ma,该年龄与已有的斑岩体侵位时代(122 Ma)一致,说明东窝东矿床黄铁绢英岩化蚀变与斑岩体侵位有密切联系.此外,对比分析地表弱蚀变和钻孔中强黄铁绢英岩化花岗闪长斑岩的岩石地球化学结果,运用"等浓度线(isocon)方程"及其推导方程,探讨黄铁绢英岩化蚀变过程中的不同元素的带入、带出特点及元素迁移特征.结果表明:高场强元素质量基本守恒;轻稀土元素较重稀土元素迁移量较大,但总体上稀土元素的迁移程度较弱;主要的成矿元素Cu、Pb、Zn为带入元素.东窝东矿床含矿斑岩侵位时代和热液蚀变时限均与多龙矿集区内多不杂、波龙、铁格隆南等多个超大型-大型铜金矿床一致,说明东窝东矿床和多龙矿集区内的多个矿床受控于同一构造-岩浆成矿背景,东窝东矿区具有重要的找矿潜力.
    • 张旭波; 王敏芳; 皮道会; 刘坤; 郭晓南; 王彦博
    • 摘要: 新华铅锌(银)矿床位于钦杭成矿带南端云开地区的六万大山隆起区,是以铅锌为主的含银热液脉型多金属矿床.矿体赋存在含堇青石黑云母花岗岩中,主要呈脉状和透镜状产出.文章利用激光阶段加热技术对与矿化密切共生的白云母进行Ar-Ar年龄测定.结果表明,新华铅锌(银)多金属矿床的40Ar/39Ar坪年龄为(165.3±1.6) Ma (MSWD=0.38),反等时线年龄为(165.2±1.6) Ma (MSWD=0.42),等时线年龄和坪年龄一致,代表了白云母的冷却年龄和矿床的形成年龄,表明该矿床的形成与云开地区燕山早期的岩浆活动有关,这与区域成矿事件相吻合.结合前人对华南地区地球动力学背景的研究成果,初步认为新华铅锌(银)矿床形成于中-晚侏罗世碰撞板块边缘再次活化,岩石圈伸展的构造背景.%The Xinhua Pb-Zn-(Ag) deposit,located in the Liuwandashan granite uplift zone of western Yunkai area which constitutes a part of the southern section of the Qinzhou Bay-Hangzhou Bay (QBHB) metallagenic belt in south China,is a hydrothermal vein type polymetallic deposit.Orebodies exist in the fault zone of the cordierite biotite granite,in the veinlike and lenticular forms.This paper presents precise 40Ar/39Ar ages of muscovite related to the mineralization by laser incremental 40Ar/39Ar analysis.Muscovite yielded a well-defined 40Ar/39Ar plateau age of (165.3 ± 1.6) Ma (MSWD=0.38) and inverse age of (165.2 ± 1.6) Ma (MSWD =0.42).These ages can represent the formation age of the deposit and suggest that the Xinhua deposit is related to the magmatic activities of Yanshanian period,which is in conformity with things of the regional metallogenic events.Combined with the previous studies of the geodynarnic settings of South China,the authors consider that the Xinhua deposit was most likely formed in a setting of lithospheric extension because of plate boundary reactivation in the mid-late Jurassic period.
    • 崔建军; 曲玮; 高福平; 郑光高; 赵文平; 陈龙耀; 李淼; 刘林; 于新兵
    • 摘要: 汉南地区位于扬子克拉通北缘西段.目前,在川、陕两省已在该区发现了数十个矿床(点).其中,广泛分布的铜-金矿床(点)具有热液型矿化特征,成矿条件有利,具有寻找大-中型矿床的远景.为了查明这些铜-金矿产资源的形成时代,文章运用LA-ICP-MS锆石U-Pb法和单矿物40Ar/39Ar法对汉南地区有代表性的矿床(点)进行了成矿年代学研究.其结果显示,潘坝成矿期热液脉的锆石U-Pb年龄为(744±10)Ma,黑云母和钾长石40Ar/39Ar视年龄介于740Ma~700Ma之间.元山寺的成矿期白云母40Ar/39Ar坪年龄为(744±4) Ma,等时线年龄为(748±7)Ma.由于本次测试选择了成矿期矿物,其结果可以代表成矿时代.因此,汉南很可能存在晋宁晚期的铜-金成矿事件.根据区域地质演化历史,笔者认为汉南铜-金矿化(744Ma)是造山晚期加厚岩石圈下部(山根)拆沉的结果.%The Hannan region is located in the western part of the northern margin of the Yangtze craton.Up till now,geological exploration departments of Shaanxi and Sichuan Provinces have discovered dozens of ore deposits (ore spots) in this region.Among them,Cu-Au deposits are widely distributed and characterized by hydrothermal mineralization,favorable metallogenic conditions,and the prospect of finding large and medium-sized deposits.To determine the metallogenic epoch of the Cu-Au mineralization in the Hannan region,the authors investigated the metallogenic chronology of two typical deposits.The results show that the zircon U-Pb age for Cu-Au mineralized hydrothermal veins at Panba Village is (744 ± 10) Ma,while the ages of the biotite and potassium feldspar of these hydrothermal veins,based on 40Ar/39Ar age spectrum results,range between 740 Ma and 700 Ma.The 40Ar/39Ar plateau age of muscovite in the mineralized granite at Yuanshansi is (744 ± 4) Ma,and the isochron age is (748 ± 7) Ma.As the survey tests were performed on the minerals of the mineralization period,the results obtained are likely to represent the metallogenic epoch of Cu-Au deposits.The Cu-Au hydrothermal mineralization events are proved to have happened probably in the Late Jinning period in Hannan region.According to the evolution history of regional geology,the authors hold that Cu-Au mineralization (744 Ma) in Hannan was induced by the delamination in the lower part of the lithosphere of the orogenic belt on the northwestern margin of the Yangtze Craton.According to data available,the dynamic background and influencing range of the mineralization in this epoch have been discussed.
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