角岩

Sm-Nd and Rb-Sr isotope data for amphibolite of the Bayanduxi Group, Inner Mongolia, China, are presented in the paper.

白银都西群主要由斜长角闪岩、变粒岩、长英片岩和条带状混合岩组成，是白银都西-白乃庙地体的重要组成部分[1，3]，主要分布在内蒙古白乃庙铜矿床东北白银都西一带。

Dhofar 1180 is a basalt-bearing feldspathic lunar breccia,containing various types of lithic clasts(gabbro,anorthositic gabbro,gabbroic anorthosite,troctolite,and microporphyritic crystalline impact melt breccia).

该陨石含有辉长岩、斜长岩质辉长岩、辉长质斜长岩、橄长岩和微斑熔融角砾岩等多种类型岩屑，同时还存在含钛玻屑和长石质玻屑。

Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.

本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究，获得如下重要认识：（1）发现辉石出溶结构，由此获得峰期变质温度为850 C，并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质；（2）通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因，进而确定该区不存在晚期角闪岩相变质作用；（3）在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩，为泛非构造热事件的碰撞造山成因提供了重要佐证；（4）对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期，～550 Ma，热事件结束于～500 Ma，年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象；（5）进一步确认了东南极内部普里兹带的存在，它属于冈瓦纳超大陆内部的第二条泛非期缝合带，据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成，而是多个不同块体拼合的结果。

The structure and evolution of the south tectonic melange are relative simple, and its basement, Middle Proterozoic metamorphosed diorite, is relative younger.

南部构造混杂岩带结构和演化相对较简单，其基底岩系相对年青，为中元古界角闪岩相变质的苦海杂岩。

Geochemistrical research illustrated that the protogene of eclogite consistsed of various basalts in different tectonic setting.

地球化学研究表明，七角山岩组和浒湾岩组的榴辉岩原岩是形成于多种构造背景的玄武岩。

Calidonian granites are widely developed in the Yema Nanshan area in the western segment of the Qilian orogenic belt. The geochemical characteristics of most of the granites are similar to those of adakites: SiO2≥56%, Al2O3≥15.0%, low MgO (average 2.04%), high Sr (257-889μg/g, average 546.42μg/g), low Y (7.1-25.3μg/g,average 16.67μg/g), average Sr/Y=5.89, no pronounced Eu anomaly and Sr positive anomaly. Adakites in this area have five rock types, quartz diorite, quartz monzodiorite, quartz monzonite, monzogrannite and hornblende granite. These rocks commonly contain hornblende, belonging to I-type granites.

提要：祁连西段野马南山一带发育大量的加里东期花岗岩，其中大部分花岗岩具有与adakite岩相似的地球化学特征，SiO2≥56%， Al2O3≥15.0％，低MgO（平均2.04％），高Sr(257～889μg/g，平均值546.42μg/g)，低Y（7.1～25.3μg/g，平均16.67μg/g），Sr/Y平均为35.89μg/g，Eu无明显负异常，Sr正异常，Adakite岩石类型有石英闪长岩、石英二长闪长岩、石英二长岩、角闪花岗岩、二长花岗岩，岩石中普遍含有角闪石，属I型花岗岩，地球化学图解反映该花岗岩形成环境为板块碰撞前的岛弧型，锆石U-Pb同位素年龄为444+38/-33 Ma，处在祁连造山带板块俯冲收缩阶段，因此可以推断野马南山埃达克质Adakite花岗岩是俯冲板片部分融熔和壳幔岩浆混合形成的。

Petrographic and REE and trace element geochemical studies of these rocks and Nd isotope analysis of amphibolite indicate that the protoliths of the Mengjiatun Formation complex are sandstone, mud-rich sandstone and island arc tholeiite.

对这些岩石的岩相学，稀土元素，微量元素地球化学的研究和斜长角闪岩Nd同位素的初步分析，表明孟家屯岩组的原岩建造为一套砂岩，富泥质砂岩和岛弧拉斑玄武岩组合。

The Au background values are generally high in the amphibolitic rocks of the Archean metamorphic series, which is the main source bed of the region. Amphibolite facies is the major Au-bearing lithofacies.

太古宙变质岩系中的&角闪质&岩石的金元素背景值普遍较高，为本区的主要矿源层，角闪岩相是含金的主要岩相。

This paper analyses the occurrence characteristics and formation conditions for uranium deposits within calderas and brecciated complexes of some granites in China and foreign countries .

本文分析了国内外若干产于花岗岩中破火山口及角砾杂岩内的铀矿床产出特征及形成条件，提出今后应在花岗岩区叠加的火山活动中心，注意寻找角砾杂岩型的铀矿，并把它作为花岗岩中铀矿找矿的新方向予以积极探索。

The Maotang and Putang gold deposits hosted by granitic porphyries and explosive brecciapipes are genetically related to boilling, explosion and dilution of fluid.

毛堂金矿和蒲塘金矿为两个产在花岗斑岩-爆破角砾岩筒中的斑岩-爆破角砾岩型复合矿床，二者成矿地质条件和成矿特征相似。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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