在变质改造过程中原始沉积岩和火山岩层中的铀的活动规律,首先由它在岩石中的存在形式所决定。根据结晶化学性质,铀属于这样一类元素:以类质同像形式进入常见矿物晶格中的数量极为有限,在变质岩中形成独立矿物的铀数量一般也是很低的,吸附于矿物的缺陷、表面和微裂隙中与矿物晶体结构无联系的原子、分子分散状态是它的主要存在形式,仅 During the metamorphism and transformation, the regularity of uranium activity in the original sedimentary rocks and volcanic rocks is first determined by its existence in the rock. According to the crystallographic chemistry, uranium is one such element: the amount of uranium entering the common mineral lattice in the form of the isomorphic form is extremely limited, and the amount of uranium forming the independent mineral in the metamorphic rocks is generally low, adsorbed to the mineral defects , Surface and micro-cracks in the crystal structure of the mineral unrelated atoms, molecular dispersion is its main form of existence, only