海南抱板金矿田流体包裹体地球化学研究

对海南抱板金矿田的外山，抱板和二甲等三个金矿进行的液体包裹体研究表明成矿流体为低盐度（０．１－６ｗｔ％ＮａＣｌ），中低温（２００－２４０℃）热液，处于中低压力（６０－１６０ＭＰａ）下，其ＣＯ２含量较低，探针质谱分析表明流体包裹体中存在Ｈ２Ｓ，结合ＳＯ＾２－４的存在，金在热液中可能是以硫氢络合物的形式迁移的。     

简单可靠的LE—90型光电报警器

本文对现在台站使用的测震仪报警器系统在实践中常遇到的问题,如地震发生时,仪器不能及时报警等情况,提出了简单可靠的解决方法。     

贵州西部晚二叠世晚期煤系沉积相和沉积体系

一、概述贵州西部是华南晚二叠世主要聚煤区之一。上二叠统煤系厚100至500余米,沉积类型多样,以细碎屑岩和泥岩为主,东部夹碳酸盐岩。各地含煤10—80层。晚二叠世时,研究区西边有康滇古陆,东部过渡为碳酸盐台地(图1)。     

X射线荧光滤纸片法测定纯氧化铥中主量氧化铥及相邻稀土氧化物杂质

本文拟定了一种采用滤纸片法制样,X射线荧光直接测定纯氧化铥中氧化铥主量以及氧化钬、氧化铒、氧化镱、氧化镥和氧化钇等稀土杂质含量的分析方法。其测定下限为:Tm_2O_30.11％、Ho_2O_30.20％、Er_2O_3 0.05％、Yb_2O_3 0.20％、Lu_2O_3 0.07％、Y_2O_3 0.40％。方法精度为0.2％～8.0％,对人工合成样品及试样分析结果表明方法准确度良好。方法操作简便快速、试剂耗费少、可用于稀土生产中低纯氧化铥产品的分析。     

机动测船漂移测速试验

用机动船测流的水文站,在水位高、流速大、漂浮物多的情况下,往往无法抛锚定船。针对这种情况,我们作了一项试验,以研究在未经锚定、沿水流方向漂移的测船进行测速的可能性及其改正的方法。这一试验已在我省津市、桃源等站进行了三年,收集了大量资料,取得了初步成果,证明本法虽具有局限性(如对测船操作要求严格,以及忽略漂移范围内流速的沿程变化等),但在特定条件下(如洪水期),     

联防抗灾夺丰收

1975年,湖南省 浏阳、醴陵和江西省修水、宜春、同古、上高、高安、万载等邻近气象台站,在当地党委一元化领导下,开展联防协作,实行群测、群报、群防,提高了对灾害性天气的监视能力和预报准确率。据不完全统计,参加联防协作的台站,1975年互通情报、预报127份,为农业抗灾夺丰收做出了贡献。 例如5月18日,万载县高村水     

庐枞地区安粗岩系

Volcanic rocks discussed here are distributed in the Lujizng-Zongyang region, Anhui province, covering an area of about 100 km^2, where a set of potash-rich intermediate series is developed which is particularly referred to as “Latitic Series”. The characters of the latitic series are as follows: (1) It was formed during middle Yenshanian (108--132 m.y.) ; (2) Spatially, it occurs frequently on the continental side of closing slab boundary stretching along the deep rift zone; (3) It is mainly composed of latite, trashybasalt and trachyte; (4) It contains sanidine coexisting with augite, plagioclase (labradonite, andesine and oligoclase) and magnetite, and clinopyroxene, formed under high pressure conditions, as well as pseudoleucite with no orthopyroxene and quartz; (5) The chemical composition is characterized by high alkalis, especially potasinm,with the ratio of K2O/Na2O≥1 and high alnminium but low titanium. The formation of latitis magma could be related with the slab movement. It has been shown that volcanic activities during middle Yenshanian were rather weak in intensity and small in scale as compared with those during late Yenshanian. The rather slow movement of Pacific slab during middle Yenshanian could not provide sufficient water and rubbing heat energy to the slab boundary, and therefore, partial melting could proceed only at the upper mantle depth (100-200km). It is believed that the partial melting of phlogopitelberzolite in some local regions of the continental mantle along the dosing slab boundary was responsible for the formation of potash- and aluminium-rich latitic magma,