以全球参照系为基准的珠峰地区重力场

Gravity Field of Mt.Everest Area on the Base of the Global Reference System

珠穆朗玛峰位于欧亚板块和印度板块边缘的碰撞地带 ,地壳运动活跃 ,地形复杂。三十余年来 ,我国曾单独或与国外合作在珠穆朗玛峰及其北部毗邻地区进行了五次 (196 6、1975、1992、1998和 1999年 )大规模的大地测量工作 ,其中包括天文、重力、平面、高程和气象等测量工作。根据这些大地测量成果以全球参照系为基准 ,对该地区的重力场进行了研究。提出了适用于该地区的推估重力异常。

Mt. Everest is located on the collision belt of the boundary between Eurasian and India Plates. Crustal movement is very active there, and the topography is also very complex there. In recent 30 years China dependently or cooperatively with foreign countries carried out 5 times (1966, 1975, 1992, 1998, 1999) geodetic campaigns, including astronomical determination, gravimetry, meteorological, horizontal and vertical measurements. Base on the global reference system and according to these geodetic results the gravity field in the Mt. Everest area is studied. The optimum method for the estimation of the gravity anomalies, deflection of the verticals and height anomalies in the Mt. Everest Area are suggested. The results of the estimation are listed in the paper.