求翻译：大兴安岭北部自早白垩世后无明显的构造岩浆活动, 基本上奠定了现今的大地构造格局。重力资料表明, 大兴安岭北部自蒙古的边部向东有北东向重力梯度带, 地壳逐渐减薄是什么意思？

Northern Daxinganling since the Early Cretaceous tectonic magmatism, and basically laid the present tectonic pattern. The gravity data indicate that the Northern Daxinganling edge to the east, from Mongolia, north-east to the gravity gradient zone, crustal thinning

daxinganling since as early as in northern China is packed with no apparent structure, magma activity has been basically laid down the tectonic pattern today. daxinganling gravity data show that, in northern Mongolia since the east side of north east toward gravity gradient, the earth's crust with g

North Daxinanling since the early chalk world the not obvious structure magmatic activity, basically has established the nowadays geostructure pattern.The gravity data indicated north, north Daxinanling has from Mongolia's side to the east east to the gradient of gravity belt, the earth's crust atte

No obvious since the early Cretaceous in Northern daxinganling tectonic-magmatic activity, essentially laid the tectonic structure of today. Gravity data indicate that Northern da hinggan mountains from Mongolia to the East side of the North East to the gravity gradient, the crust gradually thinning

正在翻译，请等待...