陨石矿物中微包裹体及陨石微结构的研究

本文利用电子显微镜对不同的陨石样品进行观察研究,发现了陨石中有小于1微米的原生及次生微包裹体;在吉林、东台、溧水的陨石及熔壳中,观察到多种不同成因的微结构类型,反映出陨石在形成至陨落过程中经历了凝聚、熔融、旋转、冷凝及星体间撞击等作用。为了探讨陨石陨落时的溶融特征及温度,对陨石样品加温后,在电子显微镜下观察,结果表明,不同温度下的陨石样品具明显不同的熔融结构,吉林陨石在900-1050℃产生熔融。     

华南含钨建造的地球化学研究

通过对华南代表性的地层地球化学研究,证实了华南成矿区域中合钨建造的存在。目前已确立的含钨建造主要有元古界、寒武系、泥盆系和石炭系。钨在不同构造带及不同时代含钨建造中的含量各有不同,但共同的地球化学特点是钨的丰度较高,具有一定的微量元素组合和分布型式。钨在含钨建造中的初步富集为华南地区钨的大规模、多样性的矿化奠定了物质基础。     

STUDIES ON GEOCHEMISTRY OF TUNGSTEN-BEARING FORMATIONS IN SOUTH CHINA

The studies on the representative stratigraphic geochemistry have already verified the existence of tungsten-bearing formations in the metallogenetic province of South China. Up till now, it has been established that there are tungsten-bearing formations mainly in the Proterozoic erathem, Cambrian, Devonian and Carboniferous systems. All of them are commonly characterized by high tungsten abundance, certain trace elements combination and distribution type although the tungsten contents of the tungsten-bearing formations are different from the tectonic elements and the passage of time. The preliminary concentration of tungsten in the tungsten-bearing formations has laid the foundation for extensive and diverse tungsten mineralizations in South China.     

岩浆岩副矿物中包裹体成岩温度测定新方法及其应用

本文提出利用淬火油浸法测定岩浆岩副矿物中熔融包裹体均一温度,为探讨成岩初期温度提供了有效方法,工作中利用该法对我国华南、西南、西北某些花岗岩、火山岩及斑岩副矿物中熔融包裹体的成岩温度进行了测量,获得了良好的效果。     

STUDY ON THE MICROTEXTURES OF METEORITES

The microtextures of matrix, chondrule, single mineral and fused crust in Jilin, Xi Ujimqin Banner and Mianchi chendrites have been studied with SEM (Scanning Electron Microscope). Different kinds of primary and secondary microtextures have been found, so as to distinguish primary and secondary features of meteorites. They reflect that the meteorites underwent many processes during their formations, i.e. condensation, melting, thermal metamorphism, remelting, dissolution, fracture and so on. The microtextures iu single mineral of meteorites are similar to those in matrix and chondrule. According to the chondritic and melting primary microtextures of meteorites, the chondrules of multi-origin are grouped into original chondrules and remelting secondary chondrules. The secondary microtexture of meteoritic dissolution bleb results from that the meteorites are subjected to thermal metamorphism as a result of intergranular stean and solution acting on the meteorites. The different microtextures produced in f     

陨石微结构研究

本文利用扫描电子显微镜对吉林、西乌旗、渑池球粒陨石基质、球粒、单矿物及熔壳微结构进行研究,发现了不同类型原生及次生微结构,据此可以区分陨石原生及次生的特点。它们反映了陨石形成过程中经历凝聚、熔融、热变质、重熔、溶蚀、断裂等作用。陨石单矿物中微结构与基质及球粒中相似。