摘要
米易海塔地区五马箐组地层,前人争议较多。争论焦点主要围绕其时代归属及成因问题。通过野外实际工作,发现五马箐组片岩、片麻岩内有大量长英质脉体。据其空间展布、岩石学及稀土元素特征,判定具混合岩特征。因此认为五马箐组地层岩石组合与河口群地层存在一些可比性,时代早于会理群,晚于康定群,属区域动热变质作用及混合岩化作用形成。
Age and origin of the Wumaqing Formation in Haita, Miyi, Sichuan has been controversial. Presence of felsic veins in schist and gneiss of the Wumaqing Formation in combination with petrochemical and REE geochemistry indicates that the Wumaqing Formation is characterized by migmatite and formed by dynamothermal regional metamorphism. Thus, the Wumaqing Formation may be correlated to the Hekou Group.
出处
《四川地质学报》
2014年第2期179-181,186,共4页
Acta Geologica Sichuan
关键词
五马箐组
岩石学
混合岩
海塔
Wumaqing Formation
petrography
migmatite
Haita
