松潘两岔河高砷高锑金矿石氰化提金工业试验

高砷高锑金矿石属难处理矿石之一，通过对两岔河高砷高锑金矿石采用碱浸预处理后进行堆浸和池浸氰化提金试验，获得了金浸出率76．80％和86．76％的较好指标，为该矿床的开发利用提供了一个工艺简单、经济上可行的途径。     

APPROACH TO KARST SOLUTION PROCESS RESPONSES ON CLIMATE

ＩｎｔｒｏｄｕｃｔｉｏｎＳｏｌｕｔｉｏｎａｓａｋａｒｓｔｇｅｏｍｏｒｐｈｏｌｏｇｉｃａｌｐｒｏｃｅｓｓｉｎｌａｎｄｆｏｒｍｄｅｖｅｌｏｐｍｅｎｔｈａｓｌｏｎｇｂｅｅｎｒｅｃｏｇｎｉｚｅｄ.Ｓｉｎｃｅｔｈｅｋａｒｓｔｐｒｏｃｅｓｓｅｓａｒｅａｌｍｏｓｔｅｎｔｉｒｅｌｙｓｏｌｕｔｉｏｎ,ｔｈｏｕｇｈｋａｒｓｔｌａｎｄｆｏｒｍｓａｒｅｎｏｔｏｎｌｙｃａｕｓｅｄｂｙｓｏｌｕｔｉｏｎｂｕｔａｌｓｏｂｙｅｒｏｓｉｏｎ,ｔｈｅｃｉｒｃｕｌａｔｉｏｎａｎｄｃｈｅｍｉｃａｌｃｏｍｐｏｓｉｔｉｏｎｓｏｆｋａｒｓｔｕｎ…     

Application of discovery process models in estimating petroleum resources at the play level in China

Discovery process modeling has gained wide acceptance in the Chinese exploration community. In recent years, a variety of discovery process models have been applied to the prediction of undiscovered petroleum resources at the play level in sedimentary basins in China. However, challenging problems have been encountered, particularly when one method alone has been applied to small plays in nonmarine sedimentary basins or in plays with an unusual order of discovery wells. This paper presents results gotten by using the lognormal discovery process model of the Geological Survey of Canada and the geoanchored method for three petroleum plays in basins with different geologic settings. Although the predicted shapes of the parentsize distributions which use these two models, were not always similar, the expected values of the total resources and the number of fields (pools) to be discovered are comparable. The combined use of two discovery process models in the same play compensates for the weaknesses in one method compared with the other and vice versa. Thus, more reliable estimates are the result.     

Constraints of Housing Age and Migration on Residential Mobility

This paper investigates the role of housing age in constraining residential mobility, measured as the percent of households that have moved into their homes in the past 15 months. The leading explanation for why mobility rates differ so much among regions of the United States has been the overall level of growth. The present analysis shows that the growth effect operates through both the newness of population (migration) and the newness of housing available for occupancy by all local residents. The posited explanation for this housing age effect is that progressively older units contain increasingly settled occupants, yielding fewer opportunities for in-movers in areas with older housing. It is empirically demonstrated that households in older housing have lower likelihood of recent mobility even after controlling for age, tenure, migration status, and state location of residence. The analysis reveals the temporal interdependency of mobility, migration, person age, and housing age.     

山西省土地荒漠化特征

从土地荒漠化的概念出发,对山西省土地荒漠化的现状及特征进行了分析,指出土地荒漠化是目前困扰山西社会经济可持续发展的一个重要的生态环境问题,并提出了土地荒漠化的防治举措。     

流体成矿系统与成矿作用研究

对几乎所有金属矿床类型来说，其形成过程均与金属从源岩的活化、原始渗滤、矿质运移和金属沉淀富集成矿关系密切，这些过程主要是由流体的运动和作用完成的。因此，识别金属和流体的来源，追溯流体从源区将金属运载至最终成矿部位所经过的路径，以及查明金属和流体沿运移通道发生的物理、化学和时间上的各种变化及其特殊性质，可以为矿床评价与勘查提供很有价值的定量成矿信息。成矿流体的来源－运移－沉淀（－堆积）过程会以流体成矿系统的形式保留下来。对流体成矿系统和作用的全面了解可通过调查活动的和古代的两种系统获得。活动流体成矿系统是目前正在进行原始矿质搬运的系统，调查这些系统可对运移通道中的含矿流体进行取样和监测研究。古流体成矿系统包括各时代从含金石英脉到铅－锌矿脉系统的所有热液脉型矿床以及沉积喷气型和所谓层控矿床。对含矿矿物和岩石的广泛岩石学、化学、流体包裹体和同位素研究将为定量评价与预测矿床的分布和变化提供至关重要的资料。流体成矿系统内具有一些重要特征，如各种地质要素的方向性、相关性和指示性变化。     

大营子蚀变岩型金矿床地质特征及控矿因素的研究

大营子蚀变岩型金矿主档是冀北地区新发现的一种金矿类型。矿体赋存于太古代角闪角变质岩系，特别是变质闪长岩体周边及内侧，受ＮＥ、ＮＮＥ向剪切破碎带控制，常在其傍侧断裂形成羽状矿脉。     

钙膨润土钠化技术

利用我国丰富的钙膨润土资源，人工改性和为钠膨润土，钠化原理是利用膨润土中主要矿物成分蒙脱石晶层表面吸附性能，在水存在的条件下进行盐基交换反应。泥浆性能全部达到天然优质钠膨润土的指标，完全符合国际通用ＡＰＩ标准。     

Modelling of soil temperature profiles using data from the pilot experiment at Anand

We present some preliminary results from a multi-layer soil temperature finite-difference model using the data set obtained during the pilot experiment on land surface processes at Anand. We hope that the present results will prove useful during the final field experiments scheduled for the coming monsoon season.     

A New Kind of Structural Model：Constrained Lateral Extrusion in Western Ordos Basin and Its Adjacent Regions

ＡＮｅｗＫｉｎｄｏｆＳｔｒｕｃｔｕｒａｌＭｏｄｅｌ：ＣｏｎｓｔｒａｉｎｅｄＬａｔｅｒａｌＥｘｔｒｕｓｉｏｎｉｎＷｅｓｔｅｒｎＯｒｄｏｓＢａｓｉｎａｎｄＩｔｓＡｄｊａｃｅｎｔＲｅｇｉｏｎｓＬｉｕＳｈａｏｆｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，...