相山铀矿田成矿作用的地球化学模拟

相山铀矿田是我国最大的火山岩型热液铀矿田，在地质地球化学和高温高压实研究的基础上，利用地球化学模式程序ＥＱ３／６模拟了成矿热水溶液的形成过程和减压排泄区铀成矿作用。计算机模拟结果表明，通过大气降水与碎斑熔岩相互作用，可以形成富含Ｆ和ＳｉＯ２等矿化剂的含铀热水溶液；由于铀以ＵＯ２Ｆ＾３和ＵＯ２（ＣＯ３（＾２－３等配合形式存在，非常稳定，即使在深部强还原环境中仍能能够迁移；酸性和碱性环境，尤其是强酸性     

广东莲花山斑岩型钨-金矿床蚀变矿化特征及分带模式

莲花山斑岩型钨－金矿床蚀变类型可以分作钾化、云英岩化、绢云母化、绿泥石化和青盘岩化。矿化表现为黑钨矿化、白钨矿－硫化物矿化、多金属硫化物矿化及黄铁矿化。蚀变在水平和垂向上具有分带性。由内向外由钾化向云英岩化、叠加蚀变带、绿泥石化＋绢云母化、青盘岩化转化。由浅向深，钾化增强，云英岩化减弱，被叠加蚀变带和绿泥石化及绢云母化所代替。矿化由内向外表现为由黑钨矿化向白钨矿化、多金属硫化物矿化、黄铁矿化转变，由浅向深由钨矿化转变为金矿化及多金属硫化物矿化。与典型斑岩型矿床蚀变分带对比，莲花山斑岩型矿床不同原岩类型蚀变特征变化较大，矿化则表现出富钨、金贫铜及钨金共同产出的特征。     

泌阳碱矿形成的地球化学模拟研究

泌阳碱矿过去一直被认为是原生沉积矿床。通过综合分析泌阳凹陷的地质、石油地质、碱矿地质和水文地质条件，从不同方面论证泌阳碱矿不太可能属于原生沉积矿床。利用地球化学模拟技术，从理论上模拟了泌阳碱矿的形成过程，提出了一种水－岩相互作用成矿模式，并用大量的事实支持了这种观点。     

马山金（硫）矿床地球物理地球化学找矿模式

根据矿床的地球物理地球化学异常特征，磁异常与金矿体的关系，地球化学异常及其垂向分带规律，归纳出矿床地球物理地球化学找矿模式和找矿标志。     

北山戈壁荒漠景观1∶5万地球化学测量方法研究

通过在西北北山地区进行剖面和面积性方法试验,研制出了一套适合于西北荒漠戈壁景观条件的地球化学测量方法,即包括样品布局、采样密度、样品介质、样品粒级以及不同类型的地球化学测量方法技术。试验结果证实,每平方千米采集>20目的沟谷粗碎屑介质样品,能够圈定出清晰的矿化异常,而且异常元素组合齐全,指示意义明确,较准确地反映了矿体或矿化体的形态和延伸方向。同时辅助采集植物———红莎样品和<80目细粒级样品(提供热释汞分析),可以提取掩埋矿化体的信息。     

区域化探数据处理的几种分形方法

地球化学变量兼有随机性、确定性和区域结构性的特征，传统的数学方法难以精确地描述地球化学变量的空间分布规律，而新兴的分形几何是刻画空间不规则形体的一种比较有效的工具，且分维值可以表征空间不规则形体的确定性本质。基于分形原理，提出含量-总量法、空间分形插值法和分形趋势面法3种新的分形技术，应用于区域化探数据处理。在几个典型矿区应用后发现，上述分形方法不仅可以有效地模拟地球化学变量的空间分布特征，而且在保留原始有效异常信息的基础上可以更合理地区分地球化学变量的背景与异常，具有发现和强化弱异常信息的重要功效。     

内蒙古渣尔泰山群和白云鄂博群中Pt、Pd地球化学特征及找矿建议

内蒙古渣尔泰山群和白云鄂博群是一套陆源碎屑岩、泥页岩、碳酸盐岩，地层中Pt、Pd的含量与原岩中泥质、有机碳、有机质的含量有关。其中渣尔泰山群中的阿古鲁沟组炭质板岩、增隆昌组硅质炭质板岩为含Pt、Pd最佳层位(岩性)，白云鄂博群中的比鲁特组干枚状板岩也为含Pt、Pd的最佳层位(岩性)。通过研究Pt、Pd的富集状况、存在形式、矿物学特征等，可查明渣尔泰山群、白云鄂博群中的含矿层位，以达到寻找铂、钯矿床的目的。     

区域化探找矿新案例-甘肃代家庄铅锌矿的发现

代家庄铅锌矿是在甘肃省用地球化学勘查方法发现的第一个大型铅锌矿床。作者回顾了发现该矿床的简史,研究了矿床地质、地球化学特征,探讨矿区进一步找矿的远景,讨论应用地球化学勘查方法寻找铅锌等有色金属矿产的经验和教训。     

Correlation of seismic activity and fumarole temperature at the Mt. Merapi volcano (Indonesia) in 2000

In this paper we present densely sampled fumarole temperature data, recorded continuously at a high-temperature fumarole of Mt. Merapi volcano (Indonesia). These temperature time series are correlated with continuous records of rainfall and seismic waveform data collected at the Indonesian–German multi-parameter monitoring network. The correlation analysis of fumarole temperature and precipitation data shows a clear influence of tropical rain events on fumarole temperature. In addition, there is some evidence that rainfall may influence seismicity rates, indicating interaction of meteoric water with the volcanic system. Knowledge about such interactions is important, as lava dome instabilities caused by heavy-precipitation events may result in pyroclastic flows. Apart from the strong external influences on fumarole temperature and seismicity rate, which may conceal smaller signals caused by volcanic degassing processes, the analysis of fumarole temperature and seismic data indicates a statistically significant correlation between a certain type of seismic activity and an increase in fumarole temperature. This certain type of seismic activity consists of a seismic cluster of several high-frequency transients and an ultra-long-period signal (<0.002 Hz), which are best observed using a broadband seismometer deployed at a distance of 600 m from the active lava dome. The corresponding change in fumarole temperature starts a few minutes after the ultra-long-period signal and simultaneously with the high-frequency seismic cluster. The change in fumarole temperature, an increase of 5 °C on average, resembles a smoothed step. Fifty-four occurrences of simultaneous high-frequency seismic cluster, ultra-long period signal and increase of fumarole temperature have been identified in the data set from August 2000 to January 2001. The observed signals appear to correspond to degassing processes in the summit region of Mt. Merapi.     

The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan

It is found by field investigation that the near horizontal top surface of the brown or brick-red hydrothermai alteration zone varies obviously in elevation at different sections of the same layer on the caldera‘s inner wall of Tianchi, with that at the north section near the Tianwen Peak about 110 m higher than that at the south near the Jiangjun Peak in Korea. The top surface of the hydrothermai alteration zone can be taken as key horizon to tectonic movement. The difference indicates that the total uplift height of the NW wall of the Liudaogou-Tianchi-Jingfengshan fault, the principal fault trending NE at Tianchi, is bigger than that of the SE wall ever since the occurrence of hydrothermal alteration. This also explains why the topography in the northwest side of Tianchi is steeper and with more developed river system than in the southeast. The uplifting of the northeastern wall is bigger than that of the southwest along the principal NW-trend fault, namely, the Baishanzhen-Tianchi-Jince fault. It is observed from characters of hydrothermal alteration and the palaeoresiduum, that the recent vertical movement rate along the principal NE-trend fault is larger than that of the principal NW-trend fault. The two faults intersect at Tianchi, dividing the volcano into 4 blocks, with the uplift magnitudes decreasing successively in the order of the north, the west, the east and the south block. The biggest uplift of the north block corresponds well to the shallow magma batch in the north of Tianchi observed by DSS and telluric electromagnetic sounding, and etc. and they may be related with the causes.