遵义锰矿地质特征及找矿潜力分析

遵义锰矿系指产于二迭系上统龙潭组底部以碳酸盐锰矿石为主的沉积型锰矿，几乎全部集中分布于遵义市及其附近地区。文章通过对遵义锰矿区域地质背景，矿区地质特征和矿体特征、矿床成因、找矿标志的分析，对该区找矿潜力进行了分析。     

青海北祁连松树南沟造山型金矿床地质特征及矿床成因

松树南沟金矿床位于祁连造山带北祁连加里东造山亚带南缘．靠近达坂山深大断裂带。成矿地质条件非常有利。文章在阐述成矿地质背景的基础上，详细论述了松树南沟金矿床的地质特征，并对矿床成因进行了探讨。认为晚华力西一印支期陆内碰撞造山活动叠加．沿达坂山深大断裂带旁侧形成规模较大的北西向韧性剪切带，并发生中酸性岩浆侵入活动，使原有成矿物质活化、迁移、富集、沉淀，形成了松树南沟造山型金矿床。     

Probe into Key Techniques of Regional-Oriented 3D GIS On the key techniques of 3D GIS used for regional Geological Information System

Regional Geological Information System combines the multi-dimensional and dynamic spatial information into an integrated spatial information system. 3D geological modeling and its preprocessing or post-processing are the most difficult problems for constructing the system. Based on the current 3D GIS technique, some basic problems in establishing the system are discussed in this paper, including 3D spatial data model, 3D geological modeling, and visualization of 3D geological data. A kind of 3D vector data model based on boundary representation for geological object and its topology was developed in order to model and visualize complex geological structures. In addition, some key techniques are pointed out for further study.     

东昆仑南部带磷灰石裂变径迹分析的地质意义

通过东昆仑南部带出露的上二叠统地层磷灰石裂变径迹分析,研究区内的构造演化特征。南北向剖面中4个砂岩样品的年龄为(48±3)—(89±8)Ma,径迹长度为(10.7±2.3)—(10.8±2.2)μm。裂变径迹年龄是区内逆冲演化的反映,长度分布体现了在退火带持续较长以及受隆升控制的特点。总体上具有3阶段热演化历史,约107Ma前后发生一次较为快速的冷却隆升作用,继之于约80Ma开始出现相对平静期,然后在6—12Ma进入快速冷却期,冷却速率为5.3—9.8℃/Ma或者106—196m/Ma。     

原地破碎浸铀的地质条件分析与评估

分析了原地破碎浸铀的矿床地质条件、水文地质条件、工程地质条件和工艺矿物学特征,认为原地破碎浸铀技术的顺利实施决定于不同的地质因素。以前铀矿床的勘探和地质条件的评价是基于传统的开采方法来评定的。为了采用原地破碎浸出采矿法来开采矿床,有必要对以前勘探的矿床进行开采前的重新评价,或在新勘探这类矿床时按原地破碎浸出采矿法所需的地质条件来评价。介绍了莫西涅茨.B.H所提出的对采用原地破碎浸出采矿法开采的矿床进行可行性评估的方法,并认为该评估方法对我国铀矿床开采前地质条件的评估具有指导性意义。另外以某铀矿床为例,采用莫西涅茨.B.H法进行了原地破碎浸铀的可行性评估。     

水相荧光分析法测定地质样品中的钪

研究了在水相中用桑色素荧光分析法分析钪的体系．该体系中钪的线性范围为０～６μｇ／２５ｍＬ，检出限为１．７ｎｇ／ｍＬ．体系获得了很好的选择性，铍、铝、钇及稀土不干扰．采用ＰＭＢＰ萃取分离，对地质样品的分析获得了满意的结果，试验了表面活性剂及有机小分子的影响．     

对当前地质勘查单位资本构成及其经营方式的思考

通过对地质勘查行业资本的分类论述,提出了具有实际操作性的营运方法,对地勘行业的改革发展具有较好的指导意义。     

On the linear approximation of mixture internal energies of departure

Direct Monte Carlo simulation of internal energies of departure for binary mixtures of geological interest are gathered and compared to those calculated using a linear mixing rule. Simulation results for gas–oil, oil–oil, and oil–water mixtures show that the linear mixing rule used in the Gibbs–Helmholtz Constrained (GHC) equation of state framework gives accurate approximations of binary mixture internal energies of departure. A flowchart for computing internal energies of departure using Monte Carlo simulation is included along with a sensitivity analysis for the GHC mixture energy parameter with respect to uncertainty in internal energies of departure.     

Rock quality classification and stability evaluation of undersea deposit based on M-IRMR

The mine improvement of rock mass rating (M-IRMR) evaluation method was put forward based on the existing theory of the rock quality classification and the stability evaluation in the undersea deposit of Sanshandao Gold Mine, China. The M-IRMR evaluation method includes 9 evaluation indexes which are rock compressive strength, rock quality index RQD, joint spacing, joint state, groundwater state, joint direction, ground stress, blasting vibration, and exposed area, respectively. During the evaluation process, according to the special features of the undersea deposit, the rock mass rating (RMR) method was used as the foundation, and the four geological parameters (i.e., rock compressive strength, rock quality index, joint spacing, and ground stress) were modified. The computing methods of the two engineering factors (blasting vibration and exposed area) were presented. The M-IRMR rock quality classification and stability evaluation method was applied in the level of −420 to −690 m in the undersea deposit of Sanshandao Gold Mine and the classification results were consistent with the actual situations, which can provide a scientific basis for choosing the suitable mining method and stope support system of the undersea deposit.     

川藏公路G317线H3滑坡稳定性分析

川藏公路G317线K1553＋776～K1553＋957处滑坡位于雍达曲左岸岸坡上。勘察了解了滑坡形成的过程,查明了滑坡的分布范围、滑坡所处的地质条件以及滑动面的位置,对该滑坡稳定性做了定性定量分析,认为该滑坡在持续降雨和地震的共同作用下容易产生次生滑坡,而且滑坡治理难度大,建议线路宜展线至对岸较稳定一侧。