青藏高原中东部1:100万区域重力调查成果与进展

获得了近百万平方千米、精度达1×10^-5m/s²的重力基础图件和处理解释图件;根据重力资料对大地构造进行了分区;推断了一批断裂构造;追踪、圈定了大型隐伏或半隐伏岩浆岩带;对多金属成矿带和油气盆地进行了推测;对区内的基底和沉积财内部的主要密度界面进行了研究,首次编制了中生界底和古生界底两个密度界面埋深图;对地壳厚度和地壳的均衡特征进行了研究。

1:1 000 000 regional gravimetric survey in the east-central part of the Qinghai-Xizang Plateau

The basic and interpretation maps with a precision of 1×10-5 m/s2 and an area of nearly one million km2 of the surveyed area are constructed for the east-central part of the Qinghai-Xizang Plateau. The results of research based on the gravity data include:the division of tectonic units; delineation of a number of faults; delimitation of giant buried and partly-buried magmatic belts; prediction of polymetallogenic zones and petroleum basins; examination of the major density boundaries in the basement and deposits; compilation of two burial depth diagrams of the density boundaries at the bases of the Mesozoic and Palaeozoic strata, respectively, and exploration of the crustal thickness and equilibrium.