新疆胜利达坂地区花岗岩类的地球化学及成岩环境

岩石学、地球化学和同位素地质年代学研究表明，中天山构造带北缘胜利达坂地区的花岗岩类至少是两期岩浆活动的产物，胜利达坂岩体形成于加里东晚期的岛弧构造环境，红色钾长花岗岩形成于华力西晚期，属造山期后花岗岩。     

内蒙古哈多河——阿尔本格勒地区花岗岩年代学及其地质意义

对哈多河-阿尔本格勒地区二叠纪花岗岩进行年代学研究,获得花岗岩、花岗斑岩锆石U-Pb SHRIMP年龄分别为133.2±1.7 Ma和127.0±2.0 Ma,为早白垩世.岩石化学研究表明,花岗岩、花岗斑岩均为钙碱性岩石,为S型花岗岩.岩石稀土元素分馏较为彻底,无明显的铕异常,与区域内典型二叠纪花岗岩（SI型）没有明显区别,表明在燕山晚期该地区具有碰撞造山晚期的复杂构造背景,暗示自华力西期至燕山晚期经历了多期次的碰撞造山作用,岩浆活动与古亚洲洋构造域转换、叠加滨太平洋构造域有关.     

东昆仑祁漫塔格地区华力西期花岗岩地质地球化学特征

通过对祁漫塔格地区华力西期花岗岩类型、空间分布、地质地球化学特征的研究表明，该区花岗岩分布最广的是华力西中、晚期花岗岩。华力西中期花岗岩岩石组合为钾长花岗岩、花岗岩、二长花岗岩，为高钾钙碱性系列，稀土元素含量较低，属轻稀土富集型，铕亏损较小，LILE中的Cs、Rb、Ba、K等含量相对富集，而LILE中的Sr、HFSE中Nb、Ti和P相对亏损，形成于碰撞后或造山晚期；华力西晚期花岗岩岩石组合为钾长花岗岩、花岗闪长岩、中粗粒黑云母二长花岗岩、花岗斑岩，为高钾钙碱性系列，稀土元素含量高于华力西中期花岗岩的稀土元素含量，铕亏损较为明显，微量元素以Sr、Ti和P更为亏损为特征，形成于活动大陆边缘到碰撞后花岗岩的过渡环境。     

试论柴北缘岩浆系列及其大地构造演化

柴达木盆地北缘是重要的构造-岩浆活化带和内生矿产成矿带，现今大地构造性质属地穹列。地槽演化阶段加里东期幔源岩浆活动，地台演化阶段华力西期壳幔混染Ⅰ型岩浆侵入，以及地洼演化阶段印支期非造山A型花岗岩构成了该区构造-岩浆活动的三个成因系列。     

中欧华力西褶皱带高压和低压变质矿物组合的时空关系

欧洲华力西期褶皱带出露的结晶基底岩块内的高构造层位上,广泛保存着早华力西期(大于370Ma)高压矿物组合的残余。常可见到超镁铁质石榴橄榄岩/辉石岩和酸性石榴麻粒岩在空间上共存。初始高P-T矿物的稳定性用板块构造观点进行解释,包括钙碱性大陆边缘消亡作用、地幔的岩浆和构造相互作用等。然而,构造和变质作用的相关性表明,目前地壳和地幔的相邻关系是在华力西造山旋回的后期韧性剪切作用形成的。在地壳深部,这些与抬升     

东江口、柞水岩体环斑花岗岩地质特征

东江口、柞水岩体位于北秦岭构造带与南秦岭村造带的南丹结合带南部边缘,是华力西期－印支期商丹结合带俯冲、碰撞过程中岩浆活动的结果。环麻花岗岩的发现,进一步提供了商丹结合带县复杂的地质体组成及演化历史。     

博罗科努山北坡金铜矿成因类型探讨

博罗科努山北坡是西天山地区重要的金铜矿产成矿远景苑，处于非岩浆型被动大陆边缘的一特殊大地构造环境中，华力西中期花岗岩类侵入体十分发育。该区金、铜矿点众多，矿石建造以Cu-Au-Fe为主，矿床成因归为岩浆－热流体堆积型和流体－岩石反应堆积型两种类型。矿床成因类型受岩浆－花岗岩类侵入体和断裂构造活动的控制，研究其成矿模式对本区金、铜矿产资源的正确评价有重要意义。     

西秦岭火炎山超单元地质地球化学分析

地处北秦岭加里东造山带的天水党川火炎山超单元,系早华力西期地壳造山的产物。该超单元岩石学、岩石化学、微量元素、稀土元素、锶、氧同位素均具Ｓ型花岗岩特征。由主岩浆期、补充期单元及末期细粒花岗岩脉构成一次岩浆热事件的全部产物,表现为Ｓ型花岗岩所特有的结构演化序列,并具结构演化的完整性和有序性。     

新疆北部卡拉麦里富碱花岗岩带的碱性花岗岩与锡矿

卡拉麦里碱性花岗岩形成华力西中晚期、属造山晚期至造山后拉张构造环境下形的Ａ型花岗岩。其岩石学、岩石化学脏球化学特性与国同人外Ａ型花岗岩基本相似。在Ｅｂｙ（１９９２）的Ｅｂ－Ｙ－Ｃｅ民Ｎｂ－Ｙ－３Ｇａ三角图解中，本带碱性花岗岩投影点均落在Ａ２区，表明它是大陆－大陆碰撞作用形成的Ａ２型碱性花岗岩。     

中亚造山带西准噶尔晚古生代洋陆转换与构造演化——来自晚石炭世流纹岩的证据

本文在中亚造山带西部的西准噶尔地区新发现晚石炭世柱状节理流纹岩,并根据其地球化学特征探讨了其形成的构造环境。岩石化学分析的结果表明,柱状节理流纹岩的主量元素具有高钾低钠的特征,属于高钾钙碱性和钙碱性岩浆系列;球粒陨石标准化稀土元素分配模式表现为V字型,Eu亏损,说明发生了斜长石的结晶分异。大离子亲石元素(LILE)Rb、K相对富集,高场强元素(HFSE)Nb、Ta出现负异常,反映了俯冲带岩浆的特征。研究表明该流纹岩属于A2型,形成于后造山的伸展构造环境;与该地区晚石炭世大型花岗岩类岩基具有同源性,同属于后造山伸展环境下的富碱岩浆作用。对比我国东部沿海中生代柱状节理流纹岩的大陆边缘构造环境,本研究认为西准噶尔地区在晚石炭世存在由大洋俯冲向陆内环境转变的洋陆转换特征;之前的大洋俯冲主要发育在克拉玛依-包古图一带,具有准噶尔洋板块向西北方向在哈萨克斯坦微陆块之下俯冲的构造极性。正是由晚石炭世柱状节理流纹岩所代表的后造山伸展环境下的富碱岩浆作用,终结了该地区洋陆过渡带环境。     

磐石西部地区三叠纪印支期花岗岩的基本特征

以往本区花岗岩多被确定为华力西晚期花岗岩或燕山期花岗岩、印支期花岗岩比较少见。本文以同位素年龄为依据。将本区以往确定的华力西晚期的板石花岗岩确定为晚印支期花岗岩,并详述了其基本特征和侵入期次。初步探讨了成因类型。     

内蒙古达茂旗北部岩浆活动与铜、金成矿作用

内蒙古达茂旗北部岩浆岩分布广泛,以加里东期和华力西晚期为主。加里东期侵入岩以闪长岩、石英闪长岩及斜长花岗岩为主;华力西晚期侵入岩以闪长岩、石英闪长岩、黑云母花岗岩、二长花岗岩及钾长花岗岩为主。经研究发现,铜矿化多与闪长岩、石英闪长岩及花岗闪长岩有关;金矿化多与石英闪长岩、斜长花岗岩及黑云母花岗岩有关;铜、金矿床(点)均产于岩体内或其外接触带的火山岩中,暗示铜、金矿(点)的形成与岩浆活动密切相关。进一步研究发现本区铜、金矿化主要受华力西晚期岩浆活动控制。通过对研究区成矿地质背景的讨论及与斑岩型铜、金矿床地质特征的对比,指出本区具备寻找斑岩型铜、金矿床的潜力。     

内蒙古巴音杭盖金矿床稀土元素及同位素研究

巴音杭盖金矿区分布华力西期斜长花岗岩和下元古界宝音图群的地质。辉绿岩、煌斑岩、花岗斑岩及石英脉形成于华力西期以后。其中辉绿岩和煌斑岩是典型的幔源岩,花岗伟晶岩则是典型的壳源岩。Ｈ、Ｏ、Ｓ、Ｐｂ同位素研究表明,来源于地幔的流体有以下两方面的作用：１）促使下部古老岩石中金的活化及壳、幔源岩浆的形成;２）形成迁移金的介质。     

Electron-microprobe dating of monazites from Western Carpathian basement granitoids: plutonic evidence for an important Permian rifting event subsequent to Variscan crustal anatexis

Accessory monazites from 35 granitoid samples from the Western Carpathian basement have been analysed with the electron microprobe in an attempt to broadly constrain their formation ages, on the basis of their Th, U and Pb contents. The sample set includes representative granite types from the Tatric, Veporic and Gemeric tectonic units. In most cases Lower Carboniferous (Variscan) ages have been obtained. However, a much younger mid-Permian age has been recorded for the specialised S-type granites of the Gemeric Unit, and several small A- and S-type granite bodies in the Veporic Unit and the southern Tatric Unit. This distinct Permian plutonic activity in the southern part of the Western Carpathians is an important, although previously little considered geological feature. It appears to be not related to the Variscan orogeny and is interpreted here to reflect the onset of the Alpine orogenic cycle, with magma generation in response to continental rifting. The voluminous Carboniferous granitoid bodies in the Tatric and Veporic units comprise S- and I-type variants which document crustal anatexis accompanying the collapse of a compressional Variscan orogen sector. The Variscan magmas were most likely produced through the remelting of a subducted Precambrian volcanic arc-type crust which included both igneous and sedimentary reworked volcanic-arc material. Although the 2C errors of the applied dating method are quite large and typically ᆞ-20 Ma for single samples, it would appear from the data that the Variscan S-type granitoids (333-367 Ma) are systematically older than the Variscan I-type granitoids (308-345 Ma). This feature is interpreted in terms of a prograde temperature evolution in the deeper parts of the post-collisional Variscan crust. In accordance with recently published zircon ages, this study shows that the Western Carpathian basement must be viewed as a distinct "eastern" tectonomagmatic province in the Variscan collision zone, where the post-collisional crustal melting processes occurred ~20 Ma earlier than in the central sector (South Bohemian Batholith, Hohe Tauern Batholith).     

兴蒙造山带东段火成岩构造组合、构造岩浆阶段及大地构造演化

以火成岩构造组合的概念和方法为指导,以近几年在嘉荫、伊春、鹤岗、鸡西、牡丹江等地区开展的1∶5万、1∶25万区调研究为基础,基于侵入岩锆石U-Pb年龄,建立了研究区古生代构造岩浆阶段划分的初步方案.划分出与洋壳俯冲事件有关的火成岩构造组合5期,分别为加里东期早寒武世、早中奥陶世、中志留世,华力西期晚石炭世和晚二叠世.与...     

U–Pb dating of granodiorite and granite units of the Los Pedroches batholith. Implications for geodynamic models of the southern Central Iberian Zone (Iberian Massif)

The first U–Pb geochronological results on the magmatic alignment of the Los Pedroches batholith are presented. The batholith is composed of a main granodioritic unit, several granite plutons and an important acid to basic dyke complex, all of them intrusive after the main Variscan regional deformation phase, D1, along the boundary between the Ossa-Morena and Central Iberian zones (SW Iberian Massif). Zircons from samples on both extremes of the granodiorite massif record nearly simultaneous magmatic crystallization at ca. 308 Ma, while the emplacement of granite plutons was diachronic between 314 and 304 Ma. The U–Pb results combined with new field and textural observations allow to better constrain the age of Variscan deformations D2 and D3 across the region, while the age of D1 remains imprecise. Transcurrent D2 shearing-tightening of D1 folds occurred around 314 Ma (lower Westphalian) in relation to the emplacement of the first granitic magmas. D3 faults and shear bands bearing a strong extensional component developed at ca. 308 Ma (upper Westphalian), associated to the intrusion of the main granodiorite pluton (granodiorite) of the batholith. Together with available geochemical and geophysical information, these results point to the Variscan reactivation of lithospheric fractures at the origin and subsequent emplacement of hybrid magmas within this sector of the Massif.     

云南腾冲北部华力西期印支期花岗岩

阐述了云南腾冲北部华力西期花岗斑岩（磨石岭单元）和印支期花岗岩（和尚塘单元）的地质特征、岩石特征、地球化学特征和同位素特征。资料和数据表明,前者为板内花岗岩,后者属同碰撞花岗岩,两者的产出时代恰好与滇西古特提斯洋闭合、中特提斯洋张开的演化过程相吻合。     

Petrography,geochemistry and geochronology of granite hosted rhyodacites associated with a disseminated pyrite mineralization (Arnolz,Southern Bohemian Massif,Austria)

Mineralogy and Petrology - The study focuses on a subvolcanic rhyodacite dyke intruding a fine grained biotite granite and paragneisses of the South Bohemian Massif, part of the Variscan Orogenic...     

Neogene basin development around Söke-Kuşadası (western Anatolia) and its bearing on tectonic development of the Aegean region

The AMS study has been performed on various types of the basement – Variscan granitic and surrounding – Mesozoic sedimentary rocks in the Velká Fatra Mountains, Tatric Superunit of the Central Western Carpathians. The Velká Fatra Mts. provides good opportunity for AMS study because of composite S-type and I-type granite character of pluton and clear relations to Mesozoic sedimentary rocks in the cover and nappe positions. The granitic massif consists of the three types of weakly magnetic peraluminous granites (350 – 340 Ma in age), ranging from two-mica granites to biotite granodiorites in composition and carrying accessory monazite and ilmenite; whereby they resemble common S-type and/or Ilmenite Series granite. This pre-existing granitic body was intruded by relatively young (304 Ma old) metaluminous to subaluminous, strongly magnetic (due to magnetite) tonalitic intrusion of the I-type and/or Magnetite Series granite. In all S-types investigated as well as in the I-type tonalite body, the magnetic fabrics are not uniform, but slightly variable within a body and differing from body to body. The magnetic fabrics in all granitic rocks can be classified as mostly magmatic in origin, only subordinately affected by ductile deformation. The Alpine overprint of the magnetic fabric of the Variscan granite frequent in the central areas of the Central Western Carpathians was only weak in the Velká Fatra Mts. and the magnetic fabrics of these granites thus mostly comprise the original Variscan magmatic fabrics. On the other hand, in the marginal parts of the Velká Fatra Mts. the magnetic fabrics in granites are locally conformable to the deformational magnetic fabrics in surrounding sedimentary rocks (Mesozoic in age) thus indicating at least local effects of the Alpine deformation. The magnetic fabrics in Mesozoic sedimentary rocks covering the crystalline basement are partially (Cover Formation) to entirely (Nappe Units) deformational in origin.