草河群区域变质带及石榴石的研究

辽东草河群由北向南,可以分出比较完整的中压型巴罗式变质带、变质带的分界线或等变质度线和面基本上与地槽褶皱的构造方向一致,显示出带型区域变质作用和复合变质作用的特点。区域变质相带的矿物共生组合、斜长石号码、岩石类型、矿物的物理化学性质都具独自的特征。变质相带的变泥质岩石中的石榴石均属铁铝榴石,随变质度的增高,石榴石成分中的Al2O3、MgO、FeO Fe2O3含量增加,CaO、MnO含量降低。     

辽吉东部层状混合岩的成因

辽吉东部的层状混合岩与上、下围岩始终保持整合接触,反映它的体系基本上是封闭的,没有外来组份的加入。其组构、岩石化学、微量元素和稀土资料等表明层状混合岩不足岩浆型的,而是重熔岩浆型的,其原岩是沉积变质岩。     

辽东前寒武系草河群云盘组变质复理石建造的研究

一、前言现代沉积岩石学的发展为前寒武纪地质研究提出许多新的课题。应用浊流作用的理论来认识前寒武系中的浊积岩建造在国外已有所报导。本文试图以此理论来探讨辽东早前寒武纪草河群中的这一套特殊的沉积变质建造类型,以便引起大家对此问题的关注。     

宽甸群中的层控矿床

The stratabound mineral deposits in the Kuandian Group (PtK) are all transformed deposits and might be classified into two types: syngenetic transformed deposits, such as boron, iron, rare-earth, pyrite and apatite ores, and metamorphic hydrothermal transformed deposits, such as magnesite, asbestos and talc. The boron deposits in the Kuandian Group are confined to the middle part of the Kuandian geosyncline 45 km in width and 400 km in length, constituting a boron ore zone trending in the same direction as the geosyncline itself. They may be classified commerrcially into two types, i. e., "white boron ore" and "black boron ore". The former, made up mainly of boronmagnesite and suanite, are rarely associated with ferruginous minerals, while the latter contains ludwigite and magnetite, forming ore of mixed type, the former occurs unexceptionally in PtK: while the latter can be found in three stratigraphic positions, i. e., PtK₂², PtK₄¹ and PtK₆². The B-Fe-TR formation has formed in time and space a metallogenic sequence and three obliquely arranged zones on account of the uneven distribution of useful element composition in the original strata. Within the Kuandian geosyncline, therefore, three subformations could be recognized from its periphery in inward succession: Fe-TR, B-Fe-TR and B-(Fe) subformations, accompanied by an increase in B and a decrease in Fe. So far as economic significance is concerned, the iron deposits in the Kuandian Group are likely to be assigned to four types, namely, Fe-TR type (Shengtieling type), Fe-B type (Wengquangou type), Fe-rich and sulfide-bearing type (Yanglin type) and Fe-magnesite-magnetite type (Daankou type). The "sedimentation- transformed" idea ought to be emphasized in the whole process of mineral exploration for stratabound deposits in Kuandian Group except for metamorphic-hydrothermal-transformed ones. Sedimentationis the base of being transformed, which has been verified by years of survey and prospecting.     

光电测距三角高程测量在山区代替三,四等水准的可行性探讨

本文作者根据自己在工作实践中的尝试，对在山区用光电测距三角高程测量代替三、四等水准问题，谈了几点体会．     

宽甸群中的层控矿床

宽甸群是中朝准地台东北部的一个很重要的含矿层位,其中含有一种独特的含硼建造,产有硼矿和硼镁铁矿-磁铁矿类型的矿床。