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| 1 | 河南登封地区嵩山石英岩碎屑锆石U-Pb年代学、Hf同位素组成及其地质意义显示文摘对河南登封地区广泛分布的古元古代嵩山石英岩中碎屑锆石进行了U-Pb定年和Hf同位素研究.研究结果对华北克拉通太古宙地壳的形成和演化提供了进一步的制约.嵩山石英岩碎屑锆石具有4组峰值年龄,其中以~2.50Ga的年龄峰值最为显著.此外尚有3.40,2.34Ga,2.75~2.80Ga等3组峰值年龄.嵩山石英岩中3.40Ga碎屑锆石的Hf同位素组成与华北克拉通东部发现的古老岩石中的锆石(如冀东和鞍山地区)具有较强的相似性.但是,根据最新的一些报道,华北克拉通南缘、华南地区、北秦岭构造带及其邻区均发现存在3.6Ga,甚至更为古老的地壳物质线索.因此很难明确地推测嵩山石英岩中发现的这些3.40Ga碎屑锆石的物源区.但综合迄今的研究成果,可以推测,3.4~3.6Ga的地壳物质曾经广泛地存在于古华北克拉通及其邻区.2.77~2.80Ga的碎屑锆石所占分额较小,样品中εHf(t)值最高可达6.1±1.6,接近于当时亏损地幔的Hf同位素值组成,且锆石的Hf单阶段模式年龄与形成年龄相近,表明其来于亏损地幔分异出的未经演化的物质.~2.50Ga的年龄数据约占所测数据的85%,锆石的Hf同位素组成显示其岩浆成因以新太古代地壳再造为主,伴有少量古老地壳物质的再循环.本次研究中获得最年轻的锆石年龄为(207Pb/206Pb)为(2337±23)Ma,可以作为嵩山群的下限年龄考虑(古元古代早期). | 第五春荣 孙勇 袁洪林 王洪亮 钟兴平 柳小明 | 2008 | 科学通报2008，53，16： | 64 |
| 2 | U–Pb ages and Hf isotopes for detrital zircons from quartzite in the Paleoproterozoic Songshan Group on the southwestern margin of the North China Craton显示文摘In situ U-Pb dating and Lu-Hf isotopic analysis were carried out for detrital zircons from quartzite in the Paleoproterozoic Songshan Group on the southern margin of the North China Craton (NCC). The re- sults provide further constraints on the crustal formation and evolution history of NCC. Four 207Pb/206Pb age populations were obtained from 99 analyses, with clusters at ~3.40 Ga, 2.77―2.80 Ga, ~2.50 Ga and 2.34 Ga, respectively. The 3.40 Ga old zircons have similar Hf isotopic compositions to those from Ar- chean rocks in the Jidong and Anshan areas of NCC. However, crustal remnants older than 3.6 Ga have been identified in the southern margin of NCC, the South China Craton, the northwestern part of the Qinling Orogen and its adjacent area. Thus, it is not easy to trace the source rock from which the 3.40 Ga detrital zircons were derived. It can be inferred that the crustal remnants older than 3.40 Ga might have been widely distributed in the North China Craton. The 2.77―2.80 Ga zircons make up a relatively small proportion and have the highest εHf (t) values (up to 6.1±1.6), consistent with the Hf isotopic composition of the depleted mantle at 2.83 Ga. Their single-stage Hf model age of 2.83 Ga is close to their crystallized age, suggesting that their source rocks were extracted from the contemporaneous depleted mantle. The ~2.50 Ga zircon grains constitute about 85% of the total grain population and their Hf isotopic compositions indicate major growth of juvenile crust at ~2.50 Ga but minor reworking of ancient crust. The youngest zircon dated in this study gave an U-Pb age of 2337±23 Ma, which can be considered the maximum depositional age of the formation of the Songshan Group. | DIWU ChunRong SUN Yong YUAN HongLin WANG HongLiang ZHONG XingPing LIU XiaoMing | 2008 | Chinese Science Bulletin2008，53，18： | 54 |
| 3 | 北秦岭西段冥古宙锆石(4.1~3.9Ga)年代学新进展显示文摘2007年王洪亮等报道在北秦岭西段火山岩中获得一粒年龄为4079±5Ma的冥古宙捕虏锆石。之后,对这一发现开展了深入的调查研究,我们除利用SHIMP技术方法对原4079Ma的锆石进行验证外,新获得了两粒^(207)Pb/^(206)Pb年龄为4007±29Ma和3908±45Ma捕获的变质成因锆石,表明早在4.0Ga已经有变质作用的发生,这或许说明在冥古宙时期地球已经具有相当规模和厚度的地壳。同时开展的岩石学研究表明,蕴含古老锆石的母岩属于火山碎屑熔岩类而不是火山熔岩。 | 第五春荣 孙勇 董增产 王洪亮 陈丹玲 陈亮 张红 | 2010 | 岩石学报2010，26，4： | 38 |
| 4 | Multi-stage crustal growth and cratonization of the North China Craton显示文摘The North China Craton(NCC) has a complicated evolutionary history with multi-stage crustal growth,recording nearly all important geological events in the early geotectonic history of the Earth.Our studies propose that the NCC can be divided into six micro-blocks with >~3.0-3.8 Ga old continental nuclei that are surrounded by Neoarchean greenstone belts(CRB).The micro-blocks are also termed as highgrade regions(HGR) and are mainly composed of orthogneisses with minor gabbros and BIF-bearing supracrustal beds or lenses,all of which underwent strong deformation and metamorphism of granulite- to high-grade amphibolite-facies.The micro-blocks are,in turn,from east to west,the Jiaoliao(JL),Qianhuai(QH),Ordos(ODS),Ji’ning(JN) and Alashan(ALS) blocks,and Xuchang(XCH) in the south.Recent studies led to a consensus that the basement of the NCC was composed of different blocks/terranes that were finally amalgamated to form a coherent craton at the end of Neoarchean.Zircon U-Pb data show that TTG gneisses in the HGRs have two prominent age peaks at ca.2.9-2.7 and2.6-2.5 Ga which may correspond to the earliest events of major crustal growth in the NCC.Hafnium isotopic model ages range from ca.3.8 to 2.5 Ga and mostly are in the range of 3.0-2.6 Ga with a peak at2.82 Ga.Recent studies revealed a much larger volume of TTG gneisses in the NCC than previously considered,with a dominant ca.2.7 Ga magmatic zircon ages.Most of the ca.2.7 Ga TTG gneisses underwent metamorphism in 2.6-2.5 Ga as indicated by ubiquitous metamorphic rims around the cores of magmatic zircon in these rocks.Abundant ca.2.6-2.5 Ga orthogneisses have Hf-in-zircon and Nd wholerock model ages mostly around 2.9-2.7 Ga and some around 2.6-2.5 Ga,indicating the timing of protolith formation or extraction of the protolith magma was from the mantle.Therefore,it is suggested that the 2.6-2.5 Ga TTGs probably represent a coherent event of continental accretion and major reworking(crustal melting).As a distinct characteristic,nearly all GRBs in the NCC underwent amphibolite-facies metamorphism.Zircon U-Pb ages of metamorphosed GRB mafic rocks mainly show two peak ranges at ~2.6-2.5 and 2.8-2.7 Ga.The mafic rocks are commonly believed to be derived from metabasalts,it is therefore possible that the ages represent the time of metamorphism.The tectonic settings of the GRBs are still a problem.Their geochemical characteristics are,respectively,similar to back-arc basins,rifts,island arcs or suggest imprints of mantle plumes.BIFs occur in all GRBs but also in the HGRs.This metallogenic specificity is quite different from all Phanerozoic geotectonic settings.The-2.5 Ga metamorphic-magmatic event is stronger than in most other cratons in the world.How to understand the geological significance of the 2.5 Ga event? The following points are emphasized:(1)nearly all old rocks >2.5 Ga underwent metamorphism at ~2.52-2.5 Ga;(2) Archean basement rocks in the NCC experienced strong partial melting and migmatization;(3) granitoid rocks derived from partial melting include potassium granites,TTG granites and monzonites.These granitoids rocks intruded both the Archean greenstone belts and micro-blocks;(4) ~2.5 Ga mafic dikes(amphibolites),granitic dikes(veins) and syenitic-ultramafic dykes are also developed.Therefore,we suggest an assembly model that all micro-blocks in the NCC were welded together by late Archean greenstone belts at the end of the late Neoarchean.We also propose that the various micro-blocks were surrounded by small ocean basins,and the old continental crust and the oceanic crust were hotter than today.Subduction and collision were on much smaller scales as compared to the Phanerozoic plate tectonic regime,although the tectonic style and mechanisms were more or less similar.The formation of crustal melt granites is one of the processes of cratonization,inducing generation of stable upper and lower crustal layers.This process also generated an upper crust of more felsic composition and a lower crust of more mafic composition,due to molten residual materials and some underplated gabbros. | Mingguo Zhai | 2014 | Geoscience Frontiers2014，5，4： | 40 |
| 5 | 南秦岭略阳鱼洞子岩群磁铁石英岩形成时代的锆石U-Pb年代学约束显示文摘鱼洞子杂岩是秦岭造山带出露的重要太古宙基底,也是该地区最古老的复杂地质体。鱼洞子杂岩主要由变质地层(鱼洞子岩群)和规模不等的花岗质变质侵入体(花岗片麻岩)组成。各地质体间多以构造面理接触。鱼洞子岩群是重要的铁矿产出层位,铁矿及其赋矿围岩的形成时代一直没有可靠的依据。本次选择小沟山矿区磁铁石英岩分选出大量锆石。CL影像特征显示锆石普遍具有清晰的幔-边结构,幔部发育较清晰的震荡环带,显示典型的岩浆锆石特征;边部为灰白色后期变质环带。依据锆石CL影像特征,结合锆石成因分析,通过锆石微区U-Pb同位素LA-ICPMS(激光剥蚀等离子体质谱)测定,获得鱼洞子小沟山矿区磁铁石英岩岩浆锆石不一致线上交点年龄为2645±25 Ma(MSWD=1.2),207Pb/206Pb加权平均年龄为2645±24 Ma,二者极为一致,代表石英岩原岩的形成时代。同时获得变质锆石较好的不一致线上交点年龄为2555±24 Ma(MSWD=1.4),与207Pb/206Pb加权平均年龄2527±27 Ma在误差范围内较为一致,应为原岩发生变质形成磁铁石英岩的时代,是太古宙一次重要的区域变质事件信息的反映。 | 王洪亮 徐学义 陈隽璐 闫臻 李婷 朱涛 | 2011 | 地质学报2011，85，8： | 24 |
| 6 | 前寒武纪地球动力学(Ⅵ):华北克拉通形成显示文摘华北克拉通研究近20年来取得一系列重大进展,但是还存很多遗留问题待解决。本文首先探讨了华北克拉通前寒武纪构造单元划分中存在的问题,据此提出了动态构造单元划分原则,并初步动态划分了古—中太古代、新太古代、古元古代、中—新元古代的构造单元,从而确定了不同时期构造格局演变过程。基于新的划分方案和华北克拉通记录的一系列前寒武纪大量重大地质事件,侧重探讨了不同演化阶段的独特构造样式、构造体制机制转变,基于华北克拉通一些太古宙陆核刚性化完成于25亿年,而显著的线性裂谷带或活动带最早出现于22亿年,因此,提出华北克拉通初始板块构造机制起始于新太古代末期的论断,本文约束了区域性垂向构造向区域性水平构造转换的相关构造证据。最后,本文基于长期构造解析的研究,系统论述华北克拉通于18.5亿年的最终集结过程。 | 李三忠 李玺瑶 戴黎明 刘鑫 张臻 赵淑娟 郭玲莉 赵国春 张国伟 | 2015 | 地学前缘2015，22，6： | 23 |
| 7 | 华北克拉通西部基底早前寒武纪地质事件、性质及其地质意义显示文摘综合华北克拉通西部陆块阴山地块、孔兹岩带和鄂尔多斯地块基底正、副片麻岩以及鄂尔多斯地块现代河流沙锆石U-Pb和Hf同位素资料,并根据最新获得的鄂尔多斯基底及盖层继承碎屑锆石U-Pb年龄及Hf同位素统计分析揭示,该陆块存在古、中太古代陆壳物质,自新太古代以来先后发生了新太古代~2.7Ga、2.55~2.45Ga以及古元古代2.2~2.0Ga和1.95~1.85Ga等多期构造热事件。由基底和盖层中各类岩石中获得的~2.5Ga锆石的εHf(t)多为正值,Hf陆壳模式年龄(t_(DM)~C)介于2.9~2.6Ga之间(峰值~2.75Ga),阴山地块存在~2.7Ga的岩石,鄂尔多斯地块基底有~2.7Ga继承锆石记录,证明新太古代存在一期重要的陆壳生长。2.55~2.45Ga的岩浆活动在西部陆块不同地质单元基底岩石中均有记录,出现大量壳源花岗岩和幔源岩浆侵入及麻粒岩相变质作用,它们的锆石εHf(t)值由负到正变化大,Hf陆壳模式年龄(t_(DM)~C)除少数接近岩浆活动年龄外,多数明显高于它们的形成年龄,指示了强烈的陆壳再造和一定陆壳生长,岩石组合及地球化学特征反映了汇聚挤压转为伸展环境,类似于华北陆块~2.5Ga广泛的岩浆变质事件及构造背景,揭示了不同陆块碰撞拼合而后转为伸展的构造演化过程。古元古代2.2~2.0Ga期间,沿鄂尔多斯地块北部及东部边缘出现大洋俯冲消减有关的陆缘弧花岗岩类,它们的锆石εHf(t)和t_(DM)~C值变化范围很大,表明在古元古代中晚期鄂尔多斯地块基底仍发生有陆壳增生和再造。此后在1.95~1.85Ga期间,沿鄂尔多斯地块北部的孔兹岩带和东部的中部构造带均发生顺时针P-T演化轨迹的变质作用,证明~1.95Ga鄂尔多斯地块相继与北部阴山地块和东部陆块碰撞拼合为一体,至~1.85Ga发生陆壳抬升与伸展、发生陆壳物质减压熔融的强烈混合岩化和大量S型花岗岩形成,其后发生镁铁质岩墙侵入,标志着华北陆块最终克拉通化完成。 | 张成立 苟龙龙 第五春荣 刘欣雨 赵娇 胡育华 | 2018 | 岩石学报2018，34，4： | 21 |
| 8 | 华北克拉通太古宙构造热事件时代及演化显示文摘华北克拉通存在3.8 Ga以上的形成演化历史,存在4.0~4.1 Ga锆石年龄记录.本文对华北克拉通太古宙变质基底构造热事件进行了综述,重点是事件时限.最古老变质锆石年龄记录为3.71~3.75 Ga和4.0 Ga,为北秦岭造山带西段古生代变质火山-沉积岩中的碎屑或外来锆石.古太古代(~3.3 Ga)构造热事件在鞍山地区广泛存在,导致条带状奥长花岗岩形成.新太古代早期-中太古代晚期变质锆石年龄可进一步划分为两期:2.65~2.85 Ga和~2.6 Ga. 2.65~2.85 Ga变质锆石年龄记录存在于胶东、鲁西、鲁山地区.由于后期构造热事件影响,在很多情况下难以确定变质锆石的准确年龄,但>2.65 Ga构造热事件在华北克拉通无疑存在.与2.65~2.85 Ga构造热事件相比,~2.6 Ga构造热事件更为发育,除在鲁西地区广泛存在外,在胶东、鲁山等地也存在.可把2.6 Ga作为华北克拉通新太古代早期和晚期的年龄界线.华北克拉通最重要的太古宙构造热事件出现在新太古代晚期(2.49~2.53 Ga).所有太古宙岩石分布区,都遭受了这一构造热事件影响.总体上,与华北克拉通南部地区相比,华北克拉通北部地区普遍记录了更高级别变质作用,可能与地壳剥蚀深度不同有关.华北克拉通太古宙变质作用强度和范围随时间演化不断增大,在新太古代晚期达到高潮.与太古宙大陆壳厚度和规模随时间演化不断增大的演化趋势一致.一些地区存在古元古代最早期(2.40~2.47 Ga)甚至更年轻的变质锆石年龄记录,并不意味着构造热事件的真实存在,而是古元古代晚期构造热事件强烈叠加改造的缘故. | 万渝生 颉颃强 董春艳 刘敦一 | 2020 | 地球科学2020，45，9： | 17 |
| 9 | 胶北太古宙早期锆石U-Pb定年及Hf同位素研究:华北克拉通古老陆壳增生及再循环的证据显示文摘古老陆壳物质的发现与鉴别是探索地球早期陆壳形成与演化历史的重要内容之一,锆石U-Pb年龄结合Hf同位素研究是该研究的重要手段。本文通过对胶北地体内一个长英质副片麻岩中的锆石开展系统的原位U-Pb定年和微量、稀土元素分析,获得了多个太古宙早期的锆石。根据这些锆石的阴极发光图像、Th/U比值及稀土元素球粒陨石标准化配分模式,它们具有典型岩浆锆石的特征,其中2个分析点给出了3413Ma和3400Ma(~3.4Ga)的锆石U-Pb年龄,7个分析点给出3547±19Ma(MSWD=1.16)的锆石U-Pb年龄,指示太古宙早期的陆壳岩浆事件;结合华北克拉通其它地区的类似研究结果,暗示华北克拉通可能曾经存在比现今出露面积更大的太古宙早期的古老陆壳。这些古老锆石的Hf同位素分析显示,它们的εHf(t)值在-6.19~0.95之间,平均为-2.54,两阶段Hf模式年龄在3737~4353Ma之间,平均值为~4.1Ga,远大于锆石的U-Pb年龄,指示华北克拉通存在~4.1Ga的地壳增生作用及古老陆壳(〉3.55Ga)的再循环。 | 刘建辉 刘福来 丁正江 刘平华 王舫 | 2014 | 岩石学报2014，30，10： | 14 |
| 10 | Early Paleozoic granulite-facies metamorphism and anatexis in the northern West Qinling orogen: Monazite and zircon U-Pb geochronological constraints显示文摘In the northern West Qinling orogen(WQO), granulite-facies metamorphic rocks are recognized within the Qinling Complex. These rocks are composed of amphibole-bearing two-pyroxene granulite and garnet-sillimanite gneiss with widespread migmatitization. We investigate three granulite-facies samples and one leucosome sample from the Qinling Complex, which are suitable for U-Pb analyses of zircon and monazite. SHRIMP and LA-ICPMS U-Pb age dating of zircon and monazite from two pelitic granulites provides weighted mean ages of 430±4 Ma(MSWD=0.88) and 433±4 Ma(MSWD=0.27), respectively.Based on the petrographic characteristics and zircon CL imagery, we postulated a ca. 430 Ma metamorphic timing for the pelitic granulites. LA-ICPMS zircon U-Pb data from an amphibole two-pyroxene granulite sample reports two weighted mean age groups:424±3 Ma(MSWD=0.45) and 402±3 Ma(MSWD=1.4), which were interpreted as granulite-facies metamorphic and retrograde ages, respectively. LA-ICPMS U-Pb dating of zircons from the leucosome sample yields a weighted mean age of 426±2 Ma(MSWD=0.3), which is interpreted as the crystallization age of the leucosome. These data indicate that the West QOB experienced early Paleozoic granulite-facies metamorphism and anatexis similar to the East QOB. However, it remains unclear whether the early Paleozoic granulite facies metamorphism resulted from an arc setting created by the northward subduction of the Shangdan ocean or from a continental collisional orogenic event. | MAO XiaoHong ZHANG JianXin YU ShengYao LI YunShuai YU XingXing LU ZengLong | 2017 | Science China Earth Sciences2017，60，5： | 12 |
| 11 | 华夏地块龙泉地区发现亚洲最古老的锆石显示文摘锆石这一矿物是迄今为止所发现的地球最初500个百万年间(地质学界通常称为“冥古代”)的唯一地壳物质残留,对于了解地球早期地壳演化过程至关重要。近年来,随着高精度 SHRIMP 测年技术的广泛运用,笔者最近在华夏地块龙泉地区发现了2颗约4100 Ma的碎屑锆石。其中一颗为目前发现亚洲最古老的锆石,其内部结构简单,具有正常的震荡环带,207Pb/206Pb年龄为(4127±4) Ma;其δ18O与地幔岩浆的氧同位素类似,可能来自于早期的幔源岩浆或者未经历地表过程的深部地壳物质的熔融。另外一颗锆石具有明显的核边结构,其核部结晶年龄约为4100 Ma,变质边年龄约为4070 Ma,外围还有2层岩浆增生边年龄介于3800~3600 Ma,代表了该4100 Ma的锆石核部在后期经历了复杂的地壳演化过程,4070 Ma的变质边是目前已获得最为可靠的全球变质年龄。上述发现表明冥古宙时地壳性质和构造环境存在多样性,为认识地球早期大陆演化过程提供了重要新信息。 | 邢光福 杨祝良 陈志洪 姜杨 洪文涛 靳国栋 余明刚 赵希林 段政 | 2015 | 地球学报2015，36，4： | 11 |
| 12 | Major Advances in the Study of the Precambrian Geology and Metallogenesis of the North China Craton:A Review显示文摘The North China Craton(NCC) is one of the most ancient cratons in the world and records a complex geological evolution since the early Precambrian. In addition to recording major geological events similar to those of other cratons, the NCC also exhibits some unique features such as multistage cratonization(late Archaean and Palaeoproterozoic) and long-term rifting during the Meso–Neoproterozoic. The NCC thus provides one of the best examples to address secular changes in geological history and metallogenic epochs in the evolving Earth. We summarize the major geological events and metallogenic systems of the NCC, so that the evolutionary patterns of the NCC can provide a better understanding of the Precambrian NCC and facilitate comparison of the NCC with other ancient continental blocks globally. The NCC experienced three major tectonic cycles during the Precambrian:(1) Neoarchaean crustal growth and stabilization;(2) Palaeoproterozoic rifting–subduction–accretion–collision with imprints of the Great Oxidation Event and(3) Meso–Neoproterozoic multi-stage rifting. A transition from primitive- to modern-style plate tectonics occurred during the early Precambrian to late Proterozoic and is evidenced by the major geological events. Accompanying these major geological events, three major metallogenic systems are identified:(1) the Archaean banded iron formation system;(2) Palaeoproterozoic Cu–Pb–Zn and Mg–B systems and(3) a Mesoproterozoic rare earth element–Fe–Pb–Zn system. The ore-deposit types in each of these metallogenic systems show distinct characteristics and tectonic affinities. | ZHAO Lei ZHU Xiyan ZHAI Mingguo | 2016 | Acta Geologica Sinica(English Edition)2016，90，4： | 10 |
| 13 | 华北克拉通南部太古宙大陆地壳的生长和演化显示文摘太古宙约占地球已有演化历史的三分之一强,这一时期涉及到大陆地壳起源、陆壳的巨量生长和稳定以及板块构造作用的启动、建立等诸多最根本的全球性重大地质事件。太古宙岩石在华北克拉通南部的涑水、登封、太华、霍邱和五河等杂岩中广泛出露,这为解析上述重大科学问题提供难得的素材。近十年来,在华北克拉通南部古生代-中生代火山岩或早前寒武纪变沉积岩中陆续发现冥古宙-古太古代的捕获/碎屑锆石,暗示南部地块依然尚存地球形成最初期的陆壳物质。根据华北克拉通南部太古宙岩石年龄统计结果显示有2850~2700Ma和2580~2480Ma两个突出年龄区间,对应的峰值年龄分别为~2.76Ga和~2.52Ga。其中~2.76Ga的岩石主要出露于南部的鲁山、霍邱、五河和中条山地区。此外,在华北克拉通诸多地区,诸如怀安、阜平、五台、中条等地区的花岗质片麻岩和变质沉积岩中也均发现年龄为~2.76Ga的碎屑锆石或者继承锆石,暗示华北克拉通2.85~2.70Ga岩石的分布似乎比现今出露范围更为广泛。与整个华北克拉通类似,2.58~2.48Ga岩石亦在克拉通南部广泛分布,尤其是嵩箕地区的登封杂岩几乎全部是由新太古代晚期的岩石组成。~2.52Ga是华北克拉通南部,乃至整个克拉通太古宙地壳演化最突出、最重要的岩浆-构造事件,明显有别于全球其它诸多典型克拉通。已有的同位素资料研究表明华北克拉通南部,乃至整个克拉通在太古宙经历了两期明显的地壳生长事件:一期发生在2.85~2.70Ga左右,以形成于此时期的涑水杂岩中花岗质岩石和鲁山太华片麻岩系中深成侵入岩和斜长角闪岩为代表;另一期发生在2.58~2.48Ga,以登封杂岩、涑水杂岩以及小秦岭地区太华杂岩中~2.52Ga各类花岗质岩石和变基性岩为代表。华北克拉通正是经过这两期陆壳巨量生长事件之后完成初始的克拉通化。我们在登封杂岩中识别出形成于俯冲汇聚环境的TTG质片麻岩、类似于赞岐岩的变闪长岩和具有N-MORB地球化学特征的变基性火山岩,提出其构成'新太古代构造混杂岩',标志着新太古代末期具有现代体制的板块构造在华北克拉通南部已经开始启动。最近,在登封杂岩中识别出的新太古代双变质带也支持上述观点。 | 第五春荣 | 2021 | 岩石学报2021，37，2： | 10 |
| 14 | 鄂尔多斯地块基底研究新的思考与认识显示文摘鄂尔多斯地块基底岩芯岩石组合、花岗片麻岩的锆石U-Pb年龄、Hf同位素和全岩Nd同位素组成以及航磁异常和地壳速度结构特征表明,该地块中部沿大同-华池基底断裂带存在一航磁异常梯度带,沿该带南缘发育一条2.2~2.0Ga古元古代弧岩浆活动带,并经历了1.96~1.85Ga的变质作用改造,与东缘中部带古元古代中晚期构造演化过程一样,可能代表该地块内部古元古代中晚期形成的一条构造活动带。该活动带以北为东西向展布的正航磁异常带,基底由混合岩化的变泥质和杂砂质片麻岩、片岩及大理岩和石英岩等变质表壳岩和一些花岗片麻岩类构成,记录了新太古代末~2.50Ga和古元古代中期2.2~2.0Ga两期岩浆活动及古元古代末期1.95~1.85Ga变质作用等地质事件,为一主要由新太古代陆壳物质构成的陆块。活动带南部为北东向不规则正、负相间航磁异常带,基底除少量副变质岩外,多为花岗片麻岩类,记录了古元古代中期2.2~2.0Ga岩浆热事件以及1.95~1.85Ga的变质作用改造,除新太古代物质外,还存在古、中太古代陆壳物质,是由一定规模中太古代和部分古太古代陆壳物质以及新太古代新生陆壳添加构成的古老地块。因此,鄂尔多斯地块中部沿大同-华池断裂带成为分割该地块一条重要分界带,其北部地块与其北缘孔兹岩带构成同一构造带,可能代表新太古代陆壳基底之上于古元古代晚期发育的一条大陆边缘活动带。南部则为古、中太古代陆壳与新太古新生陆壳增生而成的古老地块,代表鄂尔多斯地块古老基底陆壳的主体。 | 张成立 苟龙龙 白海峰 胡漾 武春英 | 2021 | 岩石学报2021，37，1： | 9 |
| 15 | Discovery of ~4.0 Ga detrital zircons in the Aermantai ophiolitic mélange,East Junggar,northwest China显示文摘The East Junggar is an important part of the Central Asian Orogenic Belt(CAOB).Using in situ zircon dating and Hf isotopic analysis by LA-ICP-MS and MC-ICP-MS,respectively,a detrital zircon of 4040 Ma age was found in sedimentary sequences from the Aermantai ophiolitic mélange,East Junggar.This is the oldest age record in the East Junggar terrane,and also marks the first zircon locality in the CAOB with an age older than 4.0 Ga,which is attributed to the Hadean crust.The 4040 Ma detrital zircon has anεHf(t)value of–5.2 and a two-stage Hf modal age of 4474 Ma,suggesting the presence of very old(Hadean)crustal material in the source area.Beside peak ages of 446 Ma,we found four age groups of 3.6–3.1 Ga,2.53–2.37 Ga,1.14–0.89 Ga and 0.47–0.42 Ga from 141 effective measuring points.The age of 426±4 Ma for the five youngest detrital zircons defines the lower limit of the deposition time of sedimentary sequencess in the Aermantai ophiolitic mélange.The 0.47–0.42 Ga zircons exhibit176Hf/177Hf ratios of 0.282156 to 0.282850,corresponding to variableεHf(t)values from–9.3 to 12.0 and Hf model ages from2011 to 646 Ma.These characteristics are similar to those of the early Paleozoic igneous and gneissic zircons from the Altai,but significantly different from those of the East Junggar.Based on the material structures of felspathic greywacke,the morphology,internal texture and age distributions of dated detrital zircons,in combination with a study of the regional geological data,it is suggested that the sedimentary sequences in the Aermantai ophiolitic mélange was deposited in the Late Silurian,with the main provenance from the Altai Orogen in the north.This indicates that the early Paleozoic ocean represented by the Aermantai ophiolitic mélange was readily closed during the Late Silurian,and the northern edge of the East Junggar terrane was accreted to the Altai Orogen.The joint of them then served as a marginal orogen in the southern edge of the Siberia Paleocontinent. | HUANG Gang NIU GuangZhi ZHANG ZhanWu WANG XinLu XU XueYi GUO Jun YU Feng | 2013 | Chinese Science Bulletin2013，58，30： | 9 |
| 16 | Discovery of ~4.0 Ga detrital zircons in the Changdu Block,North Qiangtang,Tibetan Plateau显示文摘在 situ 锆石由 LA-ICP-MS 和 MC-ICP-MS 标明日期使用, 3981 的由岩屑形成的锆石 ??? 鮼铧?? ? 裦蒚铩 ????? 偃 ?? 鮼 ?? 郥趽 ????腘 吗?? | ShiPing He RongShe Li Chao Wang HongFei Zhang WenHua Ji PuSheng Yu PingYang Gu Chao Shi | 2011 | Chinese Science Bulletin2011，56，7： | 9 |
| 17 | 西秦岭北缘秦岭杂岩变质作用:副片麻岩岩石学、相平衡模拟及其地质意义显示文摘造山带中的高级变质岩是研究造山带形成和演化历史的重要窗口.西秦岭北缘秦岭杂岩主要由正片麻岩、副片麻岩、少量变基性岩(基性麻粒岩)和大理岩组成.岩相学、矿物化学和相平衡模拟结果表明副片麻岩经历了3个变质演化阶段:(1)进变质阶段,以石榴子石核部包裹细粒片状黑云母和大小不等的石英为代表;(2)峰期变质阶段,矿物组合为石榴子石+斜长石+钾长石+夕线石+黑云母+金红石+石英.石榴子石变斑晶幔部成分在视剖面图上确定出峰期温压条件为T=793~803℃,P=8.8~9.5kbar;(3)降温降压的退变质阶段,主要由石榴子石的最边部及后期斜长石记录.结合已有研究资料,表明西秦岭北缘秦岭杂岩可能经历了早古生代晚期与碰撞造山作用有关的变质作用与深熔作用. | 毛小红 张建新 于胜尧 李云帅 喻星星 路增龙 周桂生 | 2018 | 地球科学2018，43，1： | 8 |
| 18 | 河西走廊晚泥盆世地层中冥古宙碎屑锆石的发现显示文摘河西走廊地区晚泥盆统中宁组地层中,利用LA-ICP-MS法测年获得了3.9Ga和4.0Ga两颗碎屑锆石,其Th/U依次为1.01和0.58,均为岩浆锆石。两颗锆石稀土元素呈轻稀土(LREE)亏损、重稀土(HREE)富集,均具有Ce正异常,其中4.0Ga锆石具有Eu负异常,3.9Ga锆石无Eu负异常。利用锆石中49Ti的含量计算原岩岩浆温度分别为792±36℃(3.9Ga)和967±45℃(4.0Ga)。3.9Ga锆石获得原位Hf同位素结果,176Hf/177Hfi=0.280169,εHf(t)=-3.6,tDM=4139Ma,tDMC=4319Ma。这两颗>3.9Ga碎屑锆石为西北地区首次发现,其微量元素特征说明在冥古宙时地球上可能存在地壳;结合前人古生物和古地磁研究结果,说明河西走廊在晚泥盆世时同澳大利亚西北部可能具有亲缘性。 | 袁伟 杨振宇 杨进辉 | 2012 | 岩石学报2012，28，4： | 7 |
| 19 | 天水地区李子园高压麻粒岩的发现:西秦岭晚泥盆纪造山的证据显示文摘西秦岭造山带北缘的天水李子园地区发现一套高压石榴石单辉麻粒岩,在变质的早古生代岛弧火山-沉积岩系中呈透镜状岩块产出。其峰期矿物组合为石榴石+单斜辉石+角闪石+斜长石+钛铁矿/榍石。利用地质温压计得到的温压条件为T=757~792℃、P=1.3~1.5GPa,达到中压相系的高压麻粒岩相变质条件。LA-ICPMS锆石U-Pb定年显示,锆石变质增生边的谐和年龄为384±1.6Ma,表明高压麻粒岩相变质作用的时代为中-晚泥盆世。结合区域地质资料,这一期变质作用要晚于北秦岭造山带中普遍记录的中低压麻粒岩-角闪岩相变质作用,可能与商丹洋闭合之后碰撞造山阶段的地壳加厚过程有关。岩浆锆石核部的谐和年龄为796±2.2Ma,代表石榴石单辉麻粒岩的原岩形成年代。其锆石核部的Hf同位素组成变化较大,对应的εHf(t)值为-7.3^+13.2,显示出不同源区岩浆混合的特征或者陆壳混染。高压麻粒岩全岩地球化学特征同样显示其经历壳幔岩浆混合作用。结合原岩的形成时代、区域上与裂解相关的岩浆作用和构造背景,我们认为原岩可能是造山带垮塌伸展阶段的壳-幔岩浆混合作用的产物,可能与新元古代Rodinia超大陆裂解事件有关。 | 杨立明 宋述光 苏犁 李艳广 董金龙 李清云 | 2018 | 岩石学报2018，34，8： | 6 |
| 20 | 扬子陆块西南缘3.8 Ga碎屑锆石及其地质意义显示文摘古老锆石和岩石的发现,是探索地球早期地质演化的关键.为进一步揭示扬子陆块基底物质组成和早期地壳形成演化,采用LA-ICP-MS锆石微区U-Pb测年,对扬子陆块西南缘禄丰地区东川群变质砂岩进行了年代学研究,发现3822±21 Ma的古老碎屑锆石.这是目前在扬子陆块获得的第2颗>3.8 Ga的古老锆石,也是目前在该地区发现的最老锆石.变质砂岩碎屑物质主要包括4个峰值年龄(~2320 Ma、~2162 Ma、~2036 Ma和~1915 Ma),2颗最年轻的锆石年龄基本限定了东川群早期最大沉积时限,与区域上火山岩时代相吻合.另外还包含少量中-晚太古代(2.6~2.9 Ga)和始太古代(3.7~3.8 Ga)的碎屑物质.Hf同位素组成显示这些碎屑锆石具有不同成因,其中2674~3822 Ma的碎屑锆石总体具有正的εHf(t)值和2.9~3.9 Ga的两阶段模式年龄,暗示扬子陆块在冥古宙-古太古代时期就有一定规模的新生陆壳分布.古元古代(1.9~2.4 Ga)的岩浆活动除有少量古元古代(2.3~2.4 Ga)新生地壳组分熔融外,大多为太古宙(2.5~3.7 Ga)古老地壳部分熔融.中元古代更多表现为古老地壳的熔融和物质再循环.研究结果为深化扬子陆块早前寒武纪地质演化认识提供了新资料. | 任光明 庞维华 王立全 孙志明 王保弟 崔晓庄 尹福光 宁括步 | 2020 | 地球科学2020，45，8： | 5 |
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