冀东陆壳结构的岩石学模型

冀东地区的古老变质岩系是一个出露的大陆地壳断面。根据变质岩系的变质相、亚相的研究和地质温压计计算的结果推定的深度,并结合地球物理测深资料,以及笔者测定和前人的岩石高压下波速实验资料提出了本区大陆地壳结构的岩石学模型。下地壳由麻粒岩相岩石组成,上部为角闪石麻粒岩亚相的中性成分的麻粒岩,下部为辉石麻粒岩亚相的基性成分的麻粒岩构成,底部夹有透镜状蛇纹石化橄榄岩以及紫苏花岗岩。中地壳主要由高角闪岩相的中性-中酸性成分的片麻岩、片岩构成,顶部为低角闪岩相的片麻岩、片岩,广泛发育英云闪长岩和花岗闪长岩岩体,含隙间高温流体相(fluid phase),形成高导-低速层。上地壳主要为绿片岩相(部分低角闪岩相)的板岩、千枚岩、片岩、变粒岩以及花岗岩组成,顶部为沉积盖层     

我国油页岩的成分和品级划分

根据我国21个油页岩产地,26个样品的分析数据,讨论了油页岩的含油率、灰分产率,灰分成分和密度等品级的划分,指出我国缺少高含油率页岩,提出中、低含油率油页岩的标准。并认为含油率在3.5~5.0%称含油页岩,含油率低于3.5%不应当作油页岩。油页岩灰分成分大多是硅铝质,因而灰熔点偏高。提出了油页岩灰分成分的分类表。指出我国油页岩的密度高于国外样品,原因是钙质成分含量较低。     

The New Meteorite Fall of Yanzhuang—A Severely Shocked H6 Chondrite with Black Molten Materials

At 21:45 hr (Beijing time) on Oct. 31, 1990 the Yanzhuang meteorite hit the ground at the Yanzhuang village, Wenyuan County, Guangdong Province. Several fragments, totalling 3.5 kg, were recovered during the field survey. This meteorite is a rare one of its kind due to its heavily shocked features and thick veins made up of black molten materials. Olivine and low-calcium pyroxene are compositionally homogeneous with Fa=18.59, Fs=16.35 and Wo=1.29. The chemical composition (total Fe=28.0%) and recrystallized texture of the chondritic mass show that the Yanzhuang is an H6 chondrite. The black molten materials occur in the form of blocks (up to 2×3×4 cm in size) and veins (0.1–15 mm in width), and contain a lot of rounded and elliptic FeNi-FeS blobs (up to 6–10 mm in length). The metal in these blobs exhibits distinct dendritic structure characteristic of rapid cooling. Unmolten and molten samples are very similar in chemical composition, fitting well with the average H-chondrites. Partial melting and FeNi/FeS-silicate separation have not been observed in the molten materials of the Yanzhuang. This project was financially supported by the Science Foundation of Guangdong Province.     

造盆作用及成矿盆地的历史──动力综合分类

关于盆地的分类，不少学者提出过有意义的方案。它们主要是从某个单一角度进行：或者是从历史角度分析，或者是从动力角度分析，为了更较全面地认识它们，以求得更有效地指导找矿勘探，作者把两种分析方法结合起来，提出一个综合分类方案。按历史－动力综合分类，造盆作用及盆地可划分为三大类：大洋壳型、雏陆壳（过渡壳）型及大陆壳型。大洋壳型中可细分为活动区型（主要为拉张式）和稳定区型。雏陆壳型包括前地槽型（其中可分出多种活动区型及稳定区型，有待详究；活动区型中拉张式多见）及地槽前期型（主为拉张式）．大陆壳型中计有地槽后期（褶皱带）型（挤压式或拉张式）、地台型（主为陷落式，偶为张陷式－－断拉谷Ｑｕｌａｃｏｇｅｎ）和地洼型（挤压式、拉张式或压张式）。     

河南熊耳山中生代花岗岩与成矿关系

熊耳山地区花岗岩出露面积约为404．8km^2，岩体围岩主要为太华群变质岩系和熊耳群火山岩系。这些岩体的年龄值在81-182．8Ma之间。据野外观察、室内岩矿鉴定、数据处理及计算机数学模型模拟，获知本区花岗岩系1型，物质来源于下部地壳太华群片麻岩结晶基底，