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我们以趋势分析为主要方法,对两个测区的重力资料作了电算处理。这两个测区分别是东乡枫林矿区再力详查和乐平地区区域重力测量,两区工作程度很不相同。前者面积6km~2,工作比例尺1/万,设计总精度95μgl,实达50μgl。电算取值网格和实际观测点相同,为100m×50m。后者面积7200km~2,比例尺1/20万,设计总精度0.8mgl,实达精度约0.5mgl。实际观测点按1点/3(km)~2密度布置,电算取值网格为2km×2km。在一些文章中,对趋势分析方法有效性的评价是毁誉并存,看法不一。本文亦准备谈些我们在完成上述实算工作后的粗浅体会。
Taking the trend analysis as the main method, we processed the gravity data of the two surveyed areas. These two test areas are detailed surveys in Fenglin Dongxiang and Leping areas, respectively, and regional gravimetric surveys. The two districts have very different degrees of work. The former area of 6km ~ 2, working scale 1 / 10,000, the total design accuracy of 95μgl, up to 50μgl. Calculated value grid and the actual observation point the same as 100m × 50m. The latter area of 7200km ~ 2, scale 1/20 million, the total design accuracy of 0.8mgl, Shida accuracy of about 0.5mgl. The actual observation points are arranged in the density of 1 point / 3 (km) ~ 2, and the grid of calculation value is 2km × 2km. In some articles, the evaluation of the effectiveness of trend analysis methods is a combination of goodwill and bad judgment. This article is also prepared to talk about some of the superficial experiences that we have after completing the above calculations.