北京西山地区红柱石的成矿条件和工业可利用性评价

京西红柱石是典型的接触变质条件下形成的矿化区，控矿条件主要是：一是铝饱和程度高的沉积岩，二是燕山岩体侵入所产生的热变质作用。该地区红柱石矿床工业可利用性评价，曾一度认为红柱石选别怀不好而中断了地质工作。经过本次研究和试验，重新肯定了工业利用价值。红柱石含量居我国大型矿床之首，矿石量在１亿吨以上，矿物量大于２０００万吨，并具有开采条件好，交通便利等优越条件，是一个理想的红柱石原料生产基地。     

新疆红柱石矿床地质特征及其成矿规律

新疆红柱石资源丰富,为新疆重要的非金属矿产,资源储量处在全国第一位。目前,新疆红柱石矿矿产地已发现有12处,其中有超大型1处,大型3处。红柱石是岛状结构无水铝硅酸盐矿物,属于斜方双锥晶系。红柱石具有在高温下一次性膨胀转化为莫来石后不再伸缩的特性,是优质的耐火材料。本文通过对从全疆12处红柱石矿床（点）的统计分析,从成矿地质背景、地域分布特征等方面着手,从成矿时间、空间、成因类型等几方面全面归纳其控矿要素,总结红柱石矿床的成矿地质规律,并指出找矿方向。     

宝石采撷

１宝石矿物性质部分宝石矿物性质见表１。第１２卷第４期１９９８年１２月江西地质ＪＩＡＮＧＸＩＧＥＯＬＯＧＹＶｏｌ．１２Ｎｏ．４Ｄｅｃ．１９９８性质铜兰Ｃｏｖｅｌｉｔｅ绿铜矿Ｄｉｏｐｔａｓｅ白云石Ｄｏｌｏｍｉｔｅ蓝线石Ｄｕｍｏｒｔｉｅｒｉｔｅ成分ＣｕＳＣ...     

班公湖-怒江带、羌塘地块特提斯演化 与成矿地质背景

孟家屯岩组是山东省地矿局第九地质队张连峰等人１９９２年进行１∶５００００新汶、放城幅区调时，在新泰市孟家屯一带发现的一套石英岩组合的表壳岩，并将其划归为泰山岩群的底部［１］。前人认为孟家屯岩组总体上发生了３期变质作用?：第一期区域变质作用，使孟家屯岩组泥质岩中出现了斜长石、蓝晶石、铁铝榴石，基性岩中出现斜长石、普通角闪石等新生矿物，变质作用达中级变质，岩石的形成温度为T＝５３０～６３０℃，压力p＝０．５８～０．７２GPa，属中压相系中的低角闪岩相；第二期区域变质作用为泰山岩群地层发生的退变质作用，形…     

Geological Characteristics and resources comprehensive utilization of andalusite mine in Rongxuka area,Daofu County,Sichuan Province

As advanced refractory and main mineral for extracting silicon aluminum alloy, the andalusite can be used in industry of metallurgy, building materials, ceramics, aviation and so on. The demand for andalusite will keep increasing along with the development of social economy. Rongxuka tectonic-magmatic dome is situated in the east of Songpan-Ganzi Orogenic Belt in Sichuan Province, and the flysch strata of the passive continental margin dominated by Triassic Xikang Group are widely distributed in the area. The core and periphery of the tectonic-magmatic dome are intruded by Indo-China period granodiorite and pegmatite veins. The contact metamorphic zone is mainly andalusite two-mica schist, andalusite-staurolite-mica schist, staurolite-andalusite-contained two-mica schist, two-mica schist and so on. There are non-metal deposits such as andalusite, staurolite in the schist, and rare-metal deposits such as lithium and beryllium in the pegmatite veins. The Al₂O₃ and SiO₂ contents of the andalusite of Rongxuka area are 61.44% and 37.11%, and the (K₂O + Na₂O) and FeO are 0.18% and 0.15% respectively, which can meet the industrial requirement of advanced refractory, technological ceramic and silicon-aluminum alloy raw materials. By investigation on the spot, the authors identified the prospective andalusite resource of the area is 2.3 tons, above the standard of large scale. There is a considerable amount of andalusite resource in Kangding-Yajiang-Daofu belt of Sichuan Province. With the transference of the national construction focus toward western areas, there are remarkable advantages of the comprehensive utilization and favorable development prospect of andalusite deposit, which might hopefully become the biggest or world-class andalusite deposit in China. It may alleviate the condition that part of the minerals relies on importation.     

系列富硅铝矿石水热晶化法合成纳米莫来石复相粉体的研究

分别以粉煤灰、煤矸石、红柱石千枚岩、油页岩渣等富硅铝矿石为原料,经过除杂、煅烧活化后,利用水热晶化法制备出纳米莫来石复相粉体。采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、能量色散X射线荧光光谱分析(EDX)和选区电子衍射(SAED)等手段研究了复相粉体的物相组成与显微结构,并用魔角旋转核磁(MAS~NMR)分析水热晶化反应机理。结果表明:经过一定温度煅烧活化后,当NaOH溶液浓度为2~3 mol/L、搅拌温度80~90℃、恒温3 h、液固比为10 mL/g时,上述四种原料均可制得以莫来石为主晶相的纳米复相粉体,其中以煤矸石、红柱石千枚岩、油页岩渣为原料制备的晶体均为结晶良好的柱状晶,平均长度分别为50、300和150 nm,平均长径比分别为4、3.5和3.75;以粉煤灰为原料制备的晶体主要呈现棒状、针状和纤维状,其棒状晶长度约30~80 nm、直径约4.5~30 nm。     

新疆阿尔泰红柱石-矽线石型变质带的独居石年龄及其地质意义

新疆阿尔泰地区的红柱石-矽线石型递增变质带,由绿泥石-黑云母带、黑云母-石榴石带、石榴石-十字石带、十字石-红柱石带和矽线石带组成;递增变质作用峰期温度、压力分别为T=580～680℃、P=4.0～5.1kbar;递增变质作用形成的变质岩中含有丰富的独居石副矿物,而且Th-U-Pb含量比较高,适合电子探针独居石化学法定年。依据电子探针独居石Th-U-Pb化学法(CHIME法)定年,变质时代为(262±10)～(264±22)Ma。表明红柱石-矽线石型递增变质带形成于二叠纪中期,为古亚洲洋闭合时间提供了直接的年代学依据。     

含电气石试样中红柱石的快速分析

研究了含电气石等难溶硅酸盐试样中红柱石的分析方法。样品经９８０℃高温灼烧后，电气石能被ＨＦ－Ｈ＿２ＳＯ＿４混合溶液定量溶解分离，而红柱石的溶解率很小。３７℃±１℃水浴浸取９０ｍｉｎ，能得到满意结果。方法简便快速，其相对标准偏差（ＲＳＤ，ｎ＝１０）为０．８６％。