西昌—滇中地区大、中型内生矿床分布规律及预测

用王亚光研究大型矿床空间分布规律理论来研究西昌—滇中地区大、中型内生矿床的分布规律及预测,用“矿结”一词来表明经纬线方向深大断裂交汇处是大矿的分布空间。1990年所预测的一些成矿区为1991年地质找矿工作所证实,如大红山式铁铜矿的新发现和会东发嵩铝锌矿的新进展。     

^3He／^4He Ratios and Heat Flow in the Continental Rift—valley,Eastern China

Heat flow and the origin of helium in natural gases from fault basins of the continental rift-valley in eastern China are discussed in terms of helium isotope geochemistry.³He/⁴He ratios in natural gases from the rift-valley range from 2.23 × 10⁻⁷ to 7.21 × 10⁻⁶, which are directly proportional to the concentration of helium and ΣNHC/ΣHC ratio in natural gases. Geological and isotope geochemical data suggest that helium in natural gases consists predominantly of crustal radio-genic and upper mantle-derived helium. In a simple mixing pattern between crustal He and mantle-derived He, mantle-derived helium in natural gases would account for 10–60%. Calculated values for heat flow (Q) range from 59.7 to 82.4mWm⁻², of which about 60 percent in the rift-valley is derived from the upper mantle. Natural helium reservoirs would be found in the areas where the upper mantle uplifted greatly and heat flow is large in the continental rift-valley. The project is financially supported by the National Natural Science Foundation of China.     

日本西南部白垩纪出水沉积盆地沿中央构造线古坡滑移应变标志

过去人们通常都以出水沉积盆地的东迁来解释大型向斜的倾伏方向以及在日木西南部观测到的与上白垩统出水群沉积有关的向西的纵向水流与新地层方向相反的现象．虽然古水流资料已反映了区域性古坡方向．但与盆地东迁有联系的局部古坡方向尚没有令人满意的定论。在此．笔者根据对出水山和淡路岛南部(图1b)出水群中110个滑移褶皱进行的研究，     

什么是断层陡坎？

近十年来，不断加强对构造活动性的仪器观测和历史记录。人们把注意力集中于根据地质，地貌的记录鉴别和研究古地震上，重要的是识别断层地貌特片，例如，断层陡坎，它可能是某一区域构造活动类型及其活动时间的明显标志。     

犹他州瓦萨奇断层带的分段性和全新世地震历史

前言 在伸展构造区确定与地表破裂事件相关的地震过程和时间的几个关键问题是：(1)辨别大于50公里长的断层；(2)确定特征地震的发生及其实质；(3)确定强震复发间隔及其变化，这些地震可能使该区成为一片废墟．通过古地震调查，包括横跨犹他州瓦萨奇断层带的详细地质填图和探槽工作，我们对这些问题获得了进一步的认识．