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.