延长矿山服务年限 提高矿床经济效益

在矿山管理工作中加强生产矿山地质探矿，贯彻矿山技术政策，确保三级（二级）矿量平衡，抓好矿山“三率”，注意矿产综合回收利用，充分利用低品位矿石，加强矿产资源的二次开发利用，依靠科技进步不提高矿山技术水平是矿山得以持续发展的必由之路，是提高矿床效益的有效措施。     

Characteristics of the Two Types of Granits at Sikongshan in the Eastern Part of the Dabieshan Mountains

It has been shown from petrologic,geochemical,trace element and REE evidence that the gran-ite intrusions at Sikongshan,Anhui Province,can be assigned to two distinct types which are radically different in age and origin.The Precambrian gneissic granited resulted from remelting of old continental crust while the Mesozoic granites were derived ,also through remelting,from low-Rb/Sr rocks at greater depths.Granite masses at Tiantangzhai and Zhoujiawan in the Dabieshan Mountains are also dicussed.     

Sm—Nd and Zircon U—Pb Isotopic Constraints on the Age of Formation of the Precambrian Crust in Southeast China

Nd model ages(TDM) of the Pre-Mesozoic crustal rock samples from Southeast China range from 1.2 to 3.5Ga.Two age peaks of 1.4Ga and 1.8 Ga are observed in the histogram of TDM model ages.Available U-Pb zircon inheritance ages are concentrated around 1.2-1.4Ga,1.8Ga and 2.5Ga,respectively.The combined use of Sm-Nd and U-Pb zircon inheritance ages suggests that the formation of the Precambrian curst is of episodic character.The oldest crustal nucleus may have been formed during the Late Archean(2.5Ga or older?).A rapid production of the crust took place 1.8 Ga ago,consistent with the global crust formation event at 1.7-1.9Ga.Another important episode of the addition of juvenile crustal material from the mantle in Southeast China took place 1.2-1.4Ga ago,during which the pre-existing crust was strongly reworked and/or remelted.     

亚热带山地土壤的地球化学特征及其与新构造运动的关系

对亚热带峨眉山、天目山和凤阳山的列样品研究表明，高、低海拔土壤在矿质风化与淋溶、氧化铁富集与转化、粘粒矿物类型及分布等方面均酷为相似，而这些地球化学特性在相同温差水平带的土壤上却有明显区别，由此推算的新构造运动强度与前人研究结构基本一致。这对阐明山地土壤的发生分类及拓宽新构造运动研究方法等有一定参与价值。     

工业区与非工业区辐射雾水的化学组成

1988年冬季，你们对云南省安宁工业区和西双版纳非工业区雾水进行采集，工业区雾水混浊肮脏，含有大量固体颗粒，雾水中离子浓度值与附近工厂排向大气的污染物有关，但雾水酸度值并不高。非工业区雾水比较清洁，雾水中离子浓度值平均比工业区低一个数量级。本文还讨论了一个雾过程离子浓度变化与温度层结的关系。     

湖北省大别山区贫困标准研究

本文利用湖北省大别山五个重点贫困县（罗田、麻城、英山、大悟、红安）的农村住户调查年报分户资料，采用家庭收支平衡，最低生活消费，消费函数、恩格尔系数、在分析等研究方法，提出了湖北省大别山区特困线、贫困线、低收入线标准，并比较探讨了相应的方法及结果的意义和局限。     

地图的重氮树脂胶片复制技术

地图的重氮树脂胶片复制技术赵福贵，王兴惠，王喜，李洪生（哈尔滨飞机制造公司）重江树国ｇ成像系＄ＭＩ胡泊明晰ｄ陪往一．重氮感光树月目征片复制的优点在于：它的稳定性较其它非银盐感光物质稳定，受温度、湿度影响小，幻度高、设备简单，操作容易，因此在航空、汽车...     

安徽省石台县沟汀新石器时代遗址的发…

报道了安徽省石台县沟汀新石器时代遗址的发现，并对采集到的文化遗物作了分类与描述。遗物中打制石器、磨制石器和陶器共存，并含有独具特色的石网坠。石制品大部分（７６％）以砾石为原料制成。这类遗址在皖南地区尚属首次发现。这一发现，对研究我国南方新石器时代早期的古人类活动具有重要的参考价值。