金银铂及首饰物的无损检测

使用Ｘ射线荧光光谱仪，采用透空照射、数学校正法并与比重法联用，可无损检测金、银、铂及饰物的成色，判别包、镀金饰品，较好地校正了饰物的形状、面积和光洁度的影响，不受宝石镶嵌物的限制，能够提供金、银、铂及饰物的成色和杂质元素的配比数据。用该法测定２４Ｋ及１４Ｋ值饰品的ＲＳＤ（ｎ＝９）分别为０．０１％和０．８２％，测定范围在１％～１００％之间。     

从川南低矿化度气田水中提碘研究

提出了絮凝沉淀分离低矿化度气田水中有机杂质，降低耗酸量和氧化剂用量，稳定了氧化电位。利用７１７阴离子交换树脂提取碘，碘交换吸附率达９６％以上，总收率达８５％。     

平顶山矿区煤矸石特征及综合利用途径

在查明平顶山矿区煤矸石占地面积、矸石积存量及年排矸量的基础上，作者系统地采集了全矿区井上和井下煤矸石样品，进行了化学分析、工业分析、光谱分析、Ｘ射线衍射、岩矿鉴定和扫描电镜测定。查明了本矿区煤矸石的成分、矿物及微量元素特征。并指出了各类矸石可资进行综合利用的途径。     

我国首例接触极化曲线野外实测结果

使用自行研制的野外测试设备,在云南省武定县迤纳厂铜铁矿床上进行了接触极化曲线法试验性的测试。初步证实,接触极化曲线法确有反映导电矿体成分和储量的能力,它的应用范围也不是非常局狭的。     

地质流体力学研究的进展

归纳了地质流体力学研究中目前常用的三个基础理论,即双扩散对流理论,边界层理论和相似理论,重点总结了其在岩浆岩石学、成矿学、地球物理学及沉积岩石学等研究领域内的进展。     

油气藏成藏期构造应力场与油气聚集

本文重点讨论桥口油田成藏期构造应力场研究方法和分布规律,论述了构造应力场对构造体系、沉积体系及油气形成和分布的控制作用;提出了NNE向主导构造控制研究区油气的形成和分布,预测了有利含油气区。     

The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China

Chinese historic documents recorded that on June 1, 1786, a strong M=7.75 earthquake occurred in the Kangding-Luding area, Sichuan, southwestern China, resulting in a large landslide that fell into the Dadu River. As a result, a landslide dam blocked the river. Ten days later, the sudden breaching of the dam resulted in catastrophic downstream flooding. Historic records document over 100,000 deaths by the flood. This may be the most disastrous event ever caused by landslide dam failures in the world. Although a lot of work has been carried out to determine the location, magnitude and intensity of the 1786 earthquake, relatively little is known about the occurrence and nature of the landslide dam. In this paper, the dam was reconstructed using historic documents and geomorphic evidence. It was found that the landslide dam was about 70 m high, and it created a lake with a water volume of about 50×10⁶ m³ and an area of about 1.7 km². The landslide dam breached suddenly due to a major aftershock on June 10, 1786. The peak discharge at the dam breach was estimated using regression equations and a physically based predictive equation. The possibility of a future failure of the landslide seems high, particularly due to inherent seismic risk, and detailed geotechnical investigations are strongly recommended for evaluating the current stability of the landslide.     

《南昌市及邻区历史地震和异常现象资料调查研究》概要

南昌市是江西省的省会城市,是江西省的政治、经济、文化中心,总人口424万,城区人口超过120万,旧城区人口密度高达每平方公里6万人.1996年国务院把南昌市列为全国13个地震监视防御城市之一.1999年在南昌市开展的遥感遥测工作资料成果显示:南昌市地下地质构造复杂,地下断裂纵横交错,存在发生地震的地质条件.