江西大吉山花岗岩风化壳稀土矿床稀土元素地球化学

本文系统采集分析了江西大吉山花岗岩体及其风化壳样品，通过研究其不同类型花岗岩风化壳的矿物组成、稀土元素组成和稀土元素的分配，得出了风化壳中稀土元素的分布特征和规律，讨论了风化作用过程中稀土元素的迁移机制。     

Rare Earths, Niobium and Tantalum Minerals in Bayan Obo Ore Deposit and Discussion on Their Genesis

Bayan Obo ore deposit is endowed with and lie hidden in the Proterozoic strata. The localities and occurfences of the minerals in the ore deposit were described. It is obviously that some minerals are strata minerals and some are post-strata minerals. The rare earths, niobium and tantalum minerals are exactly the post-strata minerals. In these minerals the hydrothermal metasomatic phenomena distinctly reveal their metallogenic characteristics. According to tectonic movement, magma activity, mineral paragenesis, hydrothermal metasomatism, geological age and lasting time-scale of metallogenesis, and some other factors, it is supposed that genesis of rare-earths, niobium and tantalum minerals in Bayan Obo ore deposit are closely related with hydrothermal metallogenic solution which is differentiated from silica acid and carbonic acid magma and derived from deep seated source, and then intruded into Proterozoic strata and metasomatized. It is recognized that the metallogenesis of Bayan Obo ore deposit is undergoing a long geological period and many episodes.     

我国铌钽稀土矿物学及工业利用

该文对我国铌钽稀土矿床及其产出的矿物进行了论述。根据从铌钽稀土元素的地球化学性质，认为地球物质分异是元素地球化学的原始动力。矿物学的核心内容之一是矿物的晶体结构和晶体化学，而铌钽稀土矿物晶体化学问题更占重要位置。在铌钽稀土矿物晶体结构中，铌钽是在假想酸根中呈中等大小的阳离子，而稀土则为阳离子配位多面体中的大阳离子形式存在，以此决定了它们的晶体化学行为。列出了我国产出的铌钽稀土矿物种类和各类各族中的种数，并简要论述了它们的主要矿物学特征。综述了我国铌钽稀土矿床的成矿地质时代和矿床成因类型，并列出各类型矿床中的众多不同产地，以表明矿床类型的多样性和矿化地区的广泛性。还对我国利用这类矿物的特色和可持续发展做出了建议。     

Study on Material Composition and REE－host Forms of Ion－type RE Deposits in South China

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Geochemical Characteristics of a Carbonatite Dyke Rich in Rare Earths from Bayan Obo, China

Since the discovery of the carbonatitedykes at Bayan Oho of inner Mongolia, Chi..[l], more and more evidence from geologicaland geochemical investigations reveal that theore-hosted dolomite marble of the Bayan OboRE-Nb-Fe giant mineral deposit is similar tocarbonatite in origin['~7]. Although it is notfully clear at present whether there is a realpetrogenetic linkage between the formation ofthe ore deposit and the intrusion of the carbonatite dykes, there is no doubt that the studiesof the …     

易解石是白云矿山钐、铕、钕、铌的主要工业矿物

一、前言在白云鄂博矿床的矿物原料中,铁的主要工业矿物是磷铁矿和赤铁矿,稀土的主要工业矿物是氟碳铈矿和独居石,这在五十年代初期矿床大规模勘探之时已经确定,并为后来的选矿冶炼实践所证实。而作为其中钐、铕、钕、铌的主要工业矿物的易解石的发现,则是五十年代后期的事情。经过二十余年的实践,今天,有必要强调:易解石应做为白云矿山钐、     

Transmission Electron Microscopy of Stacking Irregularities in Synchisite－（Ce）

ＴｒａｎｓｍｉｓｓｉｏｎＥｌｅｃｔｒｏｎＭｉｃｒｏｓｃｏｐｙｏｆＳｔａｃｋｉｎｇ　ＩｒｒｅｇｕｌａｒｉｔｉｅｓｉｎＳｙｎｃｈｉｓｉｔｅ－（Ｃｅ）ＹａｎｇＺｈｕｍｉｎｇ（杨主明）；ＺｈａｎｇＰｅｉｓｈａｎｇ（张培善）；ＴａｏＫｅｊｉｅ（陶克捷）（Ｉｎｓ...     

New Varieties of Na-Ca-Ba-RE Fluorocarbonate Series Minerals

ＮｅｗＶａｒｉｅｔｉｅｓｏｆＮａ－Ｃａ－Ｂａ－ＲＥＦｌｕｏｒｏｃａｒｂｏｎａｔｅＳｅｒｉｅｓＭｉｎｅｒａｌｓ￥ＹａｎｇＺｈｕ－Ｍｉｎｇ；ＺｈａｎｇＰｅｉ－Ｓｈａｎ；ＴａｏＫｅ－Ｊｉｅ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｌｏｇｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ...     

微环境对流纹岩风化速度的影响

 通过对位于浙江省衢州市南宗孔氏家庙中2个建造于1520年的流纹岩灯台的风化进行研究,不仅得出流纹岩在潮湿环境下的风化速度为0.4～9.7 mm/(100 a),而且发现不同灯台之间、同一灯台的不同部位之间以及同一灯台同一部位不同朝向之间的风化速度都有较大的差异。如：(1) 灯台1和2上圆盘上表面朝北向的风化速度分别为4.3和9.7 mm/(100 a),大于朝南向的风化速度,分别为基点(即未风化点)和2.1 mm/(100 a);而下圆鼓则恰恰相反：灯台1朝西南向和灯台2朝南向的风化速度则是其下圆鼓中最大的(分别为3.08和2.05 mm/(100 a))。据分析,造成这种差异的原因是灯台所处的微环境(如风、降水、太阳辐射等)的不同。(2) 与其他部位相比,两灯台上圆盘插烛孔的风化速度最小,其最大值为1.0 mm/(100 a)。这可能是因为插烛孔内常年积水而隔绝空气所致,可以通过采取改善石灯台风化环境的措施对其进行长期保护。