( 8 ) suggesting the deposit information in central south part of xingan - mongolia orogenic belt relate to the two events of mantle upwell and lithosphere extension since late - paleozoic . first is the lithosphere de 在这些中酸型小岩体与早二迭系地层的内外接触带往往形成eu 、 pb 、 zn 、 sn 、 ag 、 au等多金属矿床和矿化密集区。
