浙东晚中生代岩浆混合作用新证据：新昌儒岙岩石包体群的发现与地质意义

在浙江东部新昌儒岙花岗岩体中，新发现大量闪长岩石英闪长岩包体．它们成群出现，大小不一，大部分呈圆或次圆形，具微细粒结构和冷凝边构造，并发育针状磷灰石．包体的分布，形态和结构构造特点表明，它们属淬冷包体．在化学上，岩石包体与寄主花岗岩及共生的辉绿岩都属亚碱性系列．微量元素协变关系证实，它们由玄武质岩浆和花岗质岩浆不均匀混合形成．新昌儒岙岩石包体群的发现和研究，为研究浙东地区晚中生代的岩浆混合作用、壳幔作用及花岗岩的成因提供了一个新的例证。

A new case of Late Mesozoic magma mixing in eastern Zhejiang:Discovery of the Ruao enclave swarms,Xinchang County and its geological implication

A large number of dioritic, quartz dioritic enclaves are recently found in a restricted part of the Ruao granite, Xinchang County, East Zhejiang. The enclaves occurring in groups are generally round or sub-round with diameters from 20 cm to 1 m, and are often gray or dark-gray in color. Generally, there are clear boundaries between the enclaves and host granite, and some enclaves show fine-grained margins, i.e., chilled margins and have needle-like apatites. The characteristics of their distribution, shape,...