埃提哲尔花岗斑岩及其暗色微粒包体中的斜长石斑晶

位于俄罗斯境内高加索地区的埃提哲尔花岗岩体中广泛分布暗色微粒包体，花岗岩体由黑云母花岗斑岩及暗色微粒包体组成，这两种岩石均含有一种具斑点状结构枋的斜长石斑晶。在这类斜长石玉晶内部可分辨出两个成分变同，这两个界面把斜长石斑晶分割成３部分：具斑点状结构的核部；偏基性且富含细小矿物包裹体的内环带和具正环带结构的酸性外环。     

米仓山区碱性花岗岩的物质组分

古老的碱性花岗岩在地壳中较为罕见。分布在米仓山区的碱性花岗岩属晋宁期同源岩浆演化后期的产物，其岩石化学成分以富碱（Ｋ＿２Ｏ＋Ｎａ＿２Ｏ＞８．０％）为特征，且Ｎａ＿２Ｏ＞Ｋ＿２Ｏ；含多种稀土、稀有分散元素。副矿物种类繁多，人工重砂中重矿物达３２种之多。稀土、稀有分散元素赋存状态多样。详细研究其物质组成及其特征对深入探索区内岩浆演化规律、元素地球化学特征及其成矿作用具有重要的理论和实际意义。     

皖赣相邻区燕山期花岗岩类构造背景及其意义

对比研究了江南隆起带皖南地区与赣东北地区燕山期花岗岩类形成的构造背景。皖南地区燕山期花岗岩类形成于挤压构造背景,而赣东北地区燕山期花岗岩类形成于拉张向挤压过渡的构造背景;幔源岩浆直接参与到赣东北地区燕山期花岗岩类的成岩作用中,而皖南地区燕山期花岗岩类成岩物质主要为壳源;这种差异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。     

普通混凝土衬花岗岩酸洗槽的制作

通过对几种常用酸洗槽的比较,指出其缺点和不足。经过分析和研究,自行设计制作了一种以普通混凝土为主体,内衬花岗岩石板的酸洗槽。经过一年多的使用,效果很好。为冶金行业酸洗设备的制作提供了一种新思路。     

鹰峰岩体两侧韧性剪切带中岩石岩相学特征

鹰峰岩体侵位于达肯大阪群和万洞沟群之间,呈扁豆状产出.岩体两侧分布两条韧性剪切带,带内发育变质变形程度不一的糜棱岩.本文主要从岩石学的角度论述了两条韧性剪切带内的岩石岩相学特征,讨论了韧性剪切带以及剪切带内岩石的特征.     

Zircon SHRIMP U-Pb geochronology and petrogenesis of the plagiogranites from the Lagkor Lake ophiolite, Gerze, Tibet, China

Field relationship, along with petrographical, petrological, and geochemical characteristics, and zircon populations, indicates that the plagiogranites from the Lagkor Lake ophiolite in the Bangong-Nujiang suture zone (~ 20 km south of Gerze County, central Tibet, China), derived from anatexis of hydrated gabbros by ductile shearing during transport of the oceanic crust. Therefore, this kind of plagiogranite is coeval to or little later than the spreading of the oceanic crust. Zircon SHRIMP age of 166 ± 2.5 Ma for the plagiogranites indicates that an oceanic basin existed in the western part of the Bangong-Nujiang zone in the Middle Jurassic.     

河南老湾金矿床40Ar/39Ar定年及铅同位素研究

河南老湾金矿床为桐柏山北坡金银成矿带的主要组成矿床 ,矿床分布受龟山岩组、老湾花岗岩和韧性剪切带控制。石英单矿物的 4 0 Ar/ 39Ar定年方法测得金矿床的成矿年龄为 ( 91.5± 1.0 ) Ma,即金矿床形成于燕山晚期。铅同位素的研究结果表明燕山晚期形成的老湾花岗岩为矿床形成提供了成矿热液和主要的成矿物质 ,龟山岩组变质岩为矿床的另一个物源     

Yttrium zoning in garnet from the Xihuashan granitic complex and its petrological implications

The Xihuashan granitic complex is characterized by enrichment in rare-earth elements (REE). In particular, the second-stage granite (G-b) is markedly enriched in yttrium, and therefore contains complex associations of Y-bearing minerals. In this granite, garnet displays specific yttrium zoning with an Y-rich core and a “clean“ rim. Besides minute inclusions of Y-bearing minerals, garnet involves a striking amount of Y and HREE in its central area.It is suggested that enrichment in Y in the garnet core accords with that in the melt as a result of REE magmatic fractionation. However, the “clean“ rim may be the direct result of accumulation of fluid phases in the magma, which is virtually unfavorable for the entrance of REE in the garnet structure.