论个旧锡、铜多金属矿区新一轮找矿方向

文章在总结个旧矿区成矿规律的基础上，再次指出在个旧锡、铜多金属矿区进行新一轮找矿的必要性及可能性，并提出个旧矿区的东区及西区新一轮找矿的方向。     

Geophysical expression of natural recharge in different geological terrains

Behavior of the Dar-Zarrouk parameters--longitudinal unit conductance, transverse unit resistance, longitudinal resistivity, and transverse resistivity--has been compared with the behavior of the natural recharge in two geological terrains. Contour patterns of the geophysical parameters and those of natural recharge have been analyzed and a qualitative relation in their behavior was recognized. Graphical comparison of the geophysical and hydrogeological parameters clearly illustrates a qualitative relationship between the two parameters. Use of such qualitative relation in the field of ground water exploration and management studies is explained. A modest beginning is attempted to arrive at a quantitative relation between natural recharge and Dar-Zarrouk parameters.     

Seabirds at risk around offshore oil platforms in the north-west Atlantic

Seabirds aggregate around oil drilling platforms and rigs in above average numbers due to night lighting, flaring, food and other visual cues. Bird mortality has been documented due to impact on the structure, oiling and incineration by the flare. The environmental circumstances for offshore hydrocarbon development in North-west Atlantic are unique because of the harsh climate, cold waters and because enormous seabird concentrations inhabit and move through the Grand Banks in autumn (storm-petrels, Oceanodroma spp), winter (dovekies, Alle alle, murres, Uria spp), spring and summer (shearwaters, Puffinus spp). Many species are planktivorous and attracted to artificial light sources. Most of the seabirds in the region are long-distance migrants, and hydrocarbon development in the North-west Atlantic could affect both regional and global breeding populations. Regulators need to take responsibility for these circumstances. It is essential to implement comprehensive, independent arm's length monitoring of potential avian impacts of offshore hydrocarbon platforms in the North-west Atlantic. This should include quantifying and determining the nature, timing and extent of bird mortality caused by these structures. Based on existing evidence of potential impacts of offshore hydrocarbon platforms on seabirds, it is difficult to understand why this has not been and is not being, systematically implemented.     

老硐素描方法介绍

我们在普查工作中,为了提高老硐素描的效率,经研究采用了一种新的老硐素描方法,使作图效率达到每日每组(2人)150公尺以上,最高曾达200余公尺(包括坑道测量及地质情况素描,用一般方法每日每组只能作50-80公尺),而且保证了?素描图所要求的精度,提供了矿体产状资料.