对南极格罗夫山蓝冰地区收集的23个陨石进行了系统研究。经激光共聚焦显微镜观察，未查出碳质球粒陨石。经电子探针鉴定，也未发现顽火辉石球粒陨石。系统的研究确定这些陨石均为普通球粒陨石。运用x射线能谱仪进行全视域元素成分面分析方法，获得了23个陨石的化学成分。应用陨石中siO2、∑FeO、MgO、CaO的含量进行图解对比，划分出陨石的化学群，取得了初步的结果。又以电子探针测得的橄榄石、辉石矿物化学成分，采用Fa-Fs图解法进行化学群分类。这两种方法对23个陨石化学群的划分，取得了较为一致结果。陨石岩石类型的确定，主要根据陨石中球粒及基质的特征，参考其它标志，如橄榄石成分、辉石的结构、长石的特征等进行分类，效果较好。对于岩石类型为第3类的非平衡陨石，由于矿物成分变化较大，并可能有水等易挥发成分的存在，其化学群的划分不易确定。

GRV9927 meteorite from the Antarctica is composed of olivine and pyroxene. It is similar to ALHA77005 martian meteorite through igneous differentiation.

来自南极格罗夫山蓝冰地区的GRV 99027陨石为一无球粒陨石，主要由橄榄石及辉石组成。棕色橄榄石具堆晶结构及镶嵌结构等火成岩浆分异结晶的特征。陨石的矿物模式组成及化学成分显示与SNC族陨石特征相似，特别是与ALHA77005陨石十分接近。后者被确定为二辉橄榄岩质辉玻无球粒陨石类（Lherozolitic-Sheegotty，L-s）火星陨石。GRV 99027陨石的矿物化学特征以及FeO/MnO比值也与L-s类相似。可以初步认为GRV 99027陨石为SNC族火星陨石一个新的成员。二辉橄榄岩相当于地球的上地幔成分。陨石来自火星深部，为世界上极为稀有的火星样品，极具研究价值。

闽中地区元古宙马面山群变质火山岩沿政和一大埔断裂带分布，根据其主要化学成分特征应为一套“双峰式”火山岩。稀土元素地球化学特征表明：本区绿片岩及钠长变粒岩LREE富集Eu含量基本正常微量元素MORB标准化蛛网图和微量元素构造判别图显示样品具大陆拉斑玄武岩特征，并呈大陆裂谷性质，斜长角闪岩没有明显的Eu负异常，MORB标准化蛛网图曲线前部呈小的隆起，Nb-Ta亏损较为明显，其岩石特征具有过渡性的钙碱性玄武岩及T-MORB的地球化学属性原始地幔及Nb标准化蛛网图显示其可能来源于亏损地幔或有陆壳物质的混染。说明本区由大陆裂谷演化发展成为初始洋盆，有岩浆喷发，并可能发生板内俯冲。因此，这些变质火山岩应形成于裂谷-初始洋盆-板内俯冲的构造环境。

闽中地区前寒武纪龙北溪组绿片岩沿政和-大埔断裂带分布。常量元素研究表明，绿片岩的原岩为苦橄玄武岩和玄武岩。研究区内前寒武纪变质酸性火山岩常与这些基性火山岩伴生，具有“双峰式”大陆裂谷火山岩特征。本区绿片岩的微量元素地球化学特征不同于洋中脊玄武岩（MORN）及火山弧玄武岩（VAB），具有较高浓度的大离子半径亲岩元素（KUKEE），如K、Rb、Ba、Zr直至Ti；REE球粒陨石标准模式图为富LREE类型，δEu无异常到弱异常。利用Ti-Zr-Y, Nb-Zr-Y图判别，绿片岩为板内拉斑玄武岩（WPT）。因此，绿片岩原岩为大陆拉斑玄武岩，其形成的构造背景为大陆裂谷。这一结果对进一步研究政和-大埔断裂带性质以及华南地区构造演化具有重要意义。

摘要以玲珑片麻状花岗岩为初始物，采用纯水和H2O-CO2混合物（X（H2O）=0.70）两种实验介质，在1.5×102MPa和不同温度下（740℃，770℃，810℃，850℃）进行部分熔融实验验证了胶东金矿区与金矿密切相关的栾家河中粗粒花岗岩与玲珑片麻状花岗岩之间的熔融再生关系结果表明栾家河岩体是由玲珑岩体在810℃1.5×102MPa，水不饱和（X（HO2）=0.70）条件下经18%的熔融形成的实验结果与岩体中大量发育CO2包裹体的地质事实相符合，从熔体分离机制上阐明了两岩体之间的生成关系。

与前人的划分不同，本文所指的郭家岭花岗岩只包括郭家岭和丛家两个岩体。由郭家岭岩体的5个全岩样品给出的Rb-Sr等时线年龄为200.6±3.48Ma，(87 Sr/86 Sr)i=O.71127、R=0.99955，表明该岩体是印支运动末期形成的。常量元素、微量元素及稀土元素表明该花岗岩是由壳幔物质混合形成的。岩浆作用包括二个阶段：早期的花岗闪长岩构成主体，壳幔物质的混合比为65:35；晚期的石英闪长岩呈小旨株产出，壳幔物质接近1:1。

The Mamianshan Group in the middle part of Fujian Province is developed along the Zhenghe-Dapu deep fault zone which is an important geological boundary in Fujian and even in South China. Dating and study on genesis of the Marnianshan Group are important approach tocharacterize the Zhenghe-Dapu deep fault zone, and to better understand the formation and evolutionof the Cathaysia block. Salples collected from three sections yield three isochrons with consistent ages within error ranging from 1.73～1.77 Ga and with high initial eNd (t) values. This suggests that the Mamianshah metamorphic basic volcanic rocks were formed in the Mesoproterozoic rather than in the Caledonian period. This also suggests that the Zhenghe-Dapu deep fault zone was active as early as in the Mesoproterozoic when it was a premature rift zone and that the Mamianshan met, a-volcanic rocks were products of the rifting in the Cathaysia. The high initial eNd (t) values (+7.6～+10.9) of the Mamianshan meta-volcanic rocks suggest that they were derived from highly depleted mantle. This implies that this mantle produced large amount of crustal matters before the Mesoproterozoic probably in the Paieoproterozoic, which supports the existence of Cathaysia with main Paleoproterozoie crust most of which was later destroyed or reworked.

We report here on an ion probe study of rare earth element (REE) geochemistry in the lherzolitic shergottite Grove Mountains (GRV) 99027. This meteorite shows almost identical mineralogy, petrology, and REE geochemistry to those of the lherzolitic shergottites Allan Hills (ALH) A77005, Lewis Cliff (LEW) 88516, and Yamato (Y-) 793605. REE concentrations in olivine, pyroxenes, maskelynite, merrillite, and melt glass are basically comparable to previous data obtained from ALH A77005, LEW 88516, and Y-793605. Olivine is the dominant phase in this meteorite. It is commonly enclosed by large (up to several mm) pigeonite oikocrysts. Non-poikilitic areas consist of larger olivine grains (~mm), pigeonite, augite, and maskelynite. Minor merrillite (up to 150mm in size) is widespread in non-poikilitic regions, occurring interstitially between olivine and pyroxene grains. It is the main REE carrier in GRV 99027 and has relatively higher REEs (200-1000

THE Dajiangping pyrite ore deposit located in the Yunfu County of Guangdong Province is a super-large pyrite ore deposit. Its age has not been defined so far because of the absence of fossil. This note is to use Rb-Sr isotope dating of silicalite to constrain the age of the ore deposit and place special emphasis on its geological significance.