隐流塑变玄武岩的地质地球化学特征及其形成机理  

GEOCHEMICAL FEATURES AND FORMATION MECHANISM OF PLASTICALLY DEFORMED CRYPTOFLOW BASALT

作　　者：阎春德 俞惠隆[1] 余芳权 王典敷[2] 

机构地区：[1]江汉石油学院 [2]江汉油田研究院

出　　处：《地质论评》1996年第S1期52-61,共10页Geological Review

摘　　要：隐流塑变玄武岩是一种新型的基性火山岩。它由喷溢相的玄武岩经隐伏火山喷发作用改造而成。这种改造作用有残余酸性熔浆、热液的隐爆自碎作用、隐流挥发作用、塑性变形作用及原岩局部的重熔冷凝固结作用等。在这些作用下使该种岩石具有独特的野外产状、与围岩接触关系、岩石学及地球化学特征等。A new type of basalt has been discovered in Balingshan of Jiangling and Jishansi of Jingmen, Hubei.According to its geochemical features,this type of basalt has been named plastically deformed cryptoflow basalt. The rock is formed under hidden conditions and has a particular mode of occurrence,contact relationship,and petrological and geochemical features.The authors hold that this type of basalt results from modification of effusive-facies basalt by volalile-rich acid magma through cryptovolcanic eruption at very shallow depths.

关 键 词：隐流塑变玄武岩 地质地球化学特征 形成机理 隐伏火山喷发作用 

分 类 号：P588.145[天文地球—岩石学]