magma

It's difficult to decide the position of the unit in evolutional seriary of magma.

该单元在演化序列中所处的位1难以确定。

Beside fractional crystallization model,liquid immiscibility of Fluorine-rich granite magma is an important mechanism to form pegmatite and pegmatite type deposit.

除了结分异模式外,富氟花岗液态不混溶作用也是成成矿的重要机制。

The types of deposits basically are differential metasomatism in the later magma, pneumatolytic hydrothermal process, pegmatite process, residual deposits and placer deposits.

矿床类以晚期分异交代、气成热液、、风化壳和砂矿为主。

The metallogenic material was from deep alkalic basaltic magma, and the pulsatory invasion was the necessary metallogenic condition of the ore deposit.

成矿物质源于碱性玄武，基性次山多次脉动式入侵是矿床形成的必要条件。

Hence, for the minerals to be analyzed in some rocks, when there are all sorts of genesis with xenolith, magma, mantle and so on in them,the age of a certain single event can be respectively got.

因此，当某些体的被测矿物有捕虏体成因、成因、地幔成因等各种来源时，可分别求出某单一事件的年龄。