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本文是利用“空间实验室定标测量相机”(Metric Camera缩写为MC)拍摄的中国西藏日喀则地区的像片,进行室内目视判读的一次尝试。文中概略介绍了1983年11月28日—12月8日,美国航天飞机第9次飞行(STS9)装载的欧洲空间实验室的MC的基本工作参数;利用其像片编制的地质判读辅助图件(水系判读图、线性影像环形影像判读图)和典型岩性、构造的判读工作,并与陆地卫星MSS图像作了简单的比较。认为MC像片的地物影像清晰,反映基岩裸露区的地质信息丰富。在MC像片上易于区别大岩类(如花岗岩类、基性一超基性岩类、正常沉积岩及火山岩等),甚至可以发现某些地层标志层或走向上的差异;多数岩层产状可以辨认,褶皱可以定性判读;断裂判读效果很好,其规模、方向、组合都有不同程度的反映,同时,还可以判读出一些隐伏断裂。MC像片的判读效果优于MSS图像,可以满足中、小比例尺编图的要求,对中比例尺野外地质调查能起到很好的作用。
This article is an attempt to make indoor visual interpretation using the photos of Shigatse, Tibet, China, taken with the Metric Camera abbreviated as MC. This paper presents a brief introduction to the basic working parameters of the MC at the European Space Laboratory loaded on the 9th flight of the U.S. Space Shuttle (STS9) from November 28 to December 8, 1983; and uses its geo- (Interpretation of water system interpretation map, linear image interpretation of ring images) and interpretation of typical lithology and structure, and made a simple comparison with terrestrial satellite MSS images. It is considered that the images of MC images are clear and reflect the rich geological information of bare areas of bedrock. In MC images, it is easy to distinguish large rock classes (granites, basic-ultrabasic rocks, normal sedimentary rocks and volcanic rocks, etc.) and can even find differences in sign layers or trends of some formations; most rock formations can be identified, Folds can be qualitative interpretation; fracture interpretation of the effect is good, the size, direction, the combination has different degrees of reflection, but also can be interpreted some hidden faults. The interpretation of MC images is better than that of MSS images, which can meet the requirements of medium and small scale drawings and play a good role in the mid-scale field geological survey.