Preliminary study on rockfall for Al Gayah site in Yemen

Studying the landslide and rockfall in Yemen still in its preliminary stage. Al Gayah rockfall site is a chronic problem as many other areas in the Republic of Yemen. The present authors have tried to highlight, and find best solution for this problem for the first time. Field work, collecting data and laboratory test for many rock samples such physical properties, chemical for major elements and thin section have been carried out. The physical properties performed according to ASTM, and then the result have been gotten and discussed.

格尔木尕牙河镍矿地球物理地球化学异常查证

尕牙河镍矿位于东昆仑成镍带内,具有较好的找矿前景。1∶5万水系沉积物测量圈出多个以镍为主的水系沉积物综合异常。通过1∶1万高精度磁法剖面测量以及1∶1万岩石地球化学剖面等地质技术对综合异常进行了查证,圈出了基性-超基性岩体的磁异常范围以及镍异常的高值区,施工槽探和钻探工程见矿情况良好。找矿结果表明该区具有较好的镍矿找矿前景。

青海省尕牙合铜镍矿床地质特征及成矿预测

尕牙合铜镍矿床位于东昆仑造山带东段,产于基性—超基性杂岩体中,区内圈定3处规模不等的基性—超基性杂岩体∑1、∑2、∑3,岩体多呈北西至南北向分布,长105~700 m、宽100~230 m,主要岩性为橄榄辉石岩、橄榄辉石角闪石岩、角闪辉长岩等,橄榄辉石岩中普遍发育(稀疏)浸染状、星点状分布的磁黄铁矿、镍黄铁矿、黄铜矿等,并发育镍华、孔雀石化。通过前期槽探揭露,圈定铜钴镍矿体1条、矿化体3条。本文通过总结成矿地质特征、矿化规律,认为镁铁—超镁铁质岩体的分布严格受深大断裂控制,而矿(化)体又严格受其控制。寻找该类型含矿岩体时,提出以Cu、Co、Ni、Cr为组合的1∶5万水系沉积物异常和具有高密度、高磁性、高极化率、低电阻率的物探异常是重要的找矿标志。与典型矿床对比,认为该区具有较好的岩浆铜镍矿床成矿远景。