浙江花岗岩类地球化学与地壳演化──Ⅰ.显生宙花岗岩类

浙江显生宙花岗岩包括加里东期、印支期和燕山期。用钻石U－Pb年龄确定了加里东、印支期花岗岩的存在，并讨论了各期花岗岩的主元素、稀土元素、微量元素和钛、锶、铅同位素组成的特征，以及它们的岩石成因。加里东和印支期花岗岩是元古宙基底岩石部分熔融的产物，燕山期花岗岩类是壳幔混合花岗岩。加里东和印支期两次构造运动较弱。大面积出露的燕山期花岗岩和火山岩意味着中生代发生了地壳增生。     

吉林省中生代花岗岩成因系列及其构造环境

吉林省中生代花岗岩主要侵入时代可划分为印支早期、燕山早期和燕山晚期，印支早期花岗岩（γ＾１－１５）属造山花岗岩系列，是西伯利亚板块与华北板块对接过程中的产物，成因类型以Ｉ型为主；燕山早期花岗岩（γ＾２５）和燕山晚期花岗岩（γ＾３５，ＣＡ组合）属造陆隆起花岗岩系列，是环太平洋大陆边缘活化阶段的产物，成因类型为Ｉ型和Ｓ型，燕山晚期花岗岩（γ＾３５Ａ组合）属非造山花岗岩系列，形成于“类裂谷大陆边缘”阶段     

大兴安岭中南段燕山期三类不同成矿花岗岩中黑云母的化学成分特征及其成岩成矿意义

大兴安岭中南段燕山期三类不同成矿花岗岩中黑云母主要为富铁黑云母和铁黑云母，属富铁黑云母—铁叶云母系列。黑云母主要化学成分表明本区花岗岩碱度属正常碱度—过碱性岩石系列；本区燕山期花岗岩为壳幔混源成因，其岩石系列属于长江深源系列和南岭浅源系列之间的过渡类型。燕山期三个不同期次不同成矿系列的花岗岩中黑云母的化学成分明显不同。燕山早期早阶段与铜成矿有关的花岗岩黑云母相对以富镁贫铁为特征，燕山晚期早阶段与锡多金属矿化有关的花岗岩其黑云母成分相对以富铁贫镁为特征，燕山早期晚阶段与铅锌银矿化有关的花岗岩黑云母成分处于两者之间，黑云母的化学成分是判别本区三类不同成矿岩体的有效标志。     

湘东北燕山晚期花岗岩构造环境判别

在湘东北中生代多期陆内花岗岩浆活动中，燕山晚期花岗岩占有重要地位，燕山晚期大规模花岗岩侵入代表一种特殊的构造环境。本文通过湘东北主要燕山晚期花岗岩的岩石化学和微量元素来判别成岩构造环境，认为该期花岗岩属于富碱质的钙碱性花岗岩，为陆内拉张环境下的产物，进一步进行构造环境分类，判别其属于后造山PA型花岗岩，形成于造山作用后期的拉张环境，与陆内裂谷长期拉张的构造环境明显不同。在区域构造演化分析的基础上，提出湘东北燕山晚期花岗岩形成于印支－燕山早期陆内挤压－走滑剪切造山作用后期的构造松弛阶段拉张环境，燕山晚期PA型花岗岩的出现标志着陆内活化由挤压向拉张的构造转折，同时也反映湘东北的陆内活化至少经历了陆内挤压和陆内拉张两个演化阶段。     

江西金溪熊家山钼矿床加里东期与燕山期花岗岩对比及其对成矿作用的启示

加里东期和燕山期花岗岩是华南分布最广的二期花岗岩,以往的研究较少关注它们之间的成因联系及各自对成矿的贡献。江西金溪熊家山Mo矿床同时发育有加里东期和燕山期花岗岩,本文对该区二期花岗岩进行了锆石U-Pb年龄及元素与Sr-Nd-Hf同位素组成的系统测定,据此揭示了二者地质地球化学特征的差别,并探讨了它们之间的成因联系及其对成矿的可能制约关系。锆石LA-ICP-MS U-Pb定年表明,区内加里东期和燕山期岩体的成岩年龄分别为~440Ma和~155Ma。化学组成上,二期花岗岩均具有亚碱、过铝、贫铁的特征,但加里东期花岗岩更富铝,而燕山期花岗岩总体更富碱。二期花岗岩均富Cs、Rb、Th、Pb和轻稀土,贫Ba、Sr、P、Ti、Nb、Ta,但燕山期花岗岩Nb、Ta、Th含量更高,并具有偏高的Rb/Sr和Rb/Ba比值、偏低的K/Rb比值和LREE/HREE比值,以及更显著的铕负异常,指示其演化程度更高。Sr-Nd-Hf同位素组成指示加里东期花岗岩主要起源于早中元古代基底地壳物质的部分熔融,幔源或初生地壳组分未显著参与成岩过程。燕山期花岗岩具有与加里东期花岗岩类似的Sr-Nd-Hf同位素组成,且在燕山期花岗岩中存在较多的加里东期岩浆继承锆石。综合分析表明,燕山期花岗岩并非完全起源于加里东期花岗岩的重熔,后者仅是作为燕山期花岗岩源岩的组成部分参与成岩。区内钼成矿主要受燕山期岩浆事件制约,燕山期花岗质岩浆的隐爆对成矿具有重要的控制作用。加里东期花岗岩对成矿的影响主要体现在两方面,其一是通过直接参与燕山期花岗质岩浆的形成为成矿提供部分物源,另一方面是该期岩浆活动促进了陆壳的成熟和成矿元素的富集从而间接制约成矿。     

地质素描——燕山花岗岩

花岗岩(Granite)是一种由石英、长石及云母等矿物组成的酸性岩浆岩。花岗岩的种类多种多样,成因也有多种看法。经地质科技人员研究,河北燕山地区花岗岩被命名为"燕山期花岗岩(γ5)"。我国燕山期花岗岩分布很广,与许多大型矿床的形成密切相关。我国许多风景名胜区都是燕山期花岗岩。河北省青龙桥地区的燕山花岗岩呈岩基状产出。有趣的是:由于燕山花岗岩组成的山势陡峭,古人在花     

冀东燕山期花岗若成因及其与金矿化的关系

系统论述了冀东燕山期花岗石的岩石学、岩石化学、地球化学及岩浆演化等特征并将本区燕山期花岗岩分为钙碱性花岗岩系列和深部地壳重熔型花岗岩，它们与金矿是同源产物。     

江南隆起带皖赣相邻区燕山期岩浆岩Nd-Sr同位素特征

江南隆起带皖南地区与赣东北地区燕山期岩浆岩Nd-Sr同位素特征的对比研究表明,皖南燕山期花岗岩体、斑岩体及赣东北燕山期花岗岩与赣东北燕山期斑岩体在成岩物质来源上具有明显差异。皖南燕山期花岗岩和斑岩体及赣东北燕山期花岗岩成岩物质以壳源为主,成岩物质来源区夹有一定的幔源物质,而赣东北燕山期斑岩体则具有幔源特征,这是赣东北地区燕山期与岩浆岩有关的多金属矿床发育、而皖南地区不发育的重要原因。Nd-Sr同位素的研究结果与地球物理、成岩构造背景和稀土元素等研究结果相吻合。     

辽宁营口地区中生代花岗岩类的成因及其含金性

营口地区印支期花岗岩为Ⅰ型（同熔型）花岗岩,燕山期花岗岩为S型（陆壳改造型）花岗岩。印支期花岗岩是造山运动晚期岩浆作用的产物,岩浆来源于深部。燕山期花岗岩是与燕山期造山运动同构造期岩浆作用的产物,岩浆来源于浅部。金矿床的形成主要与印支期次碱性二长花岗岩岩浆作用有关。     

浙江花岗岩类地球化学与地壳演化：Ⅰ.显生化岗岩类

浙江显生化岗岩包括加里东期，印支期和燕山期。用锆石Ｕ－Ｐｂ年龄确定了加里东、印支期花岗岩的存在，并讨论了各期花岗岩的主要元素，稀土元素、向量元素和钕、锶、铅同位素组成的特征，以及它们的岩石成因。大面积出露的燕山期花岗岩和火山岩意味着中生代发生了壳增生。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of     

OCEANOGRAPHY & MARINE GEOLOGY

正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37     

ENVIRONMENTAL GEOLOGY

正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)