摘要
山东省中生代玻璃质火山岩类有玻璃熔岩(珍珠岩、松脂岩)和玻璃质火山碎屑岩(熔结角砾岩、熔结凝灰岩和晶屑凝灰岩等)两大类。玻璃熔岩和流纹质熔结凝灰岩、熔岩角砾岩属钙碱性岩系列,K_2O/Na_2O<1,Na_2O>K_2O,δ<3.3,DI为72.79—90.86。石英碱性(长石)粗面质、石英粗面质、石英安粗质、安粗质的玻璃质火山碎屑岩屑碱性岩系列,K_2O/Na_2O>1,Na_2O<K_2O,δ=3.34—6.06,DI为65.50—91.09。玻璃质火山岩不仅是膨胀珍珠岩的原料,也是膨润土、沸石岩形成的物质基础。并可作为火山灰质材料。
The Mesozoic glassy volcanic rocks fall into two major types, i. e. glassy lava (perlite, pitchstone) and glassy volcaniclastie rocks (welded breccia, ignimbrite, crystallinoclastic tuff, etc.…).The glassy lava and rhyolite ignimbrite and welded breccia are calc-alkalic rock series and characterized by K_2o/Na_2O<1, Na_2O>K_2O,σ<3. 3. DI=72. 79-90. 86.The glassy volcaniclastic rocks of alkaline (feldspathic) trachyte, quartz trachyte, quartz latiae and latite nature belong to the alkaline rock series. These rocks are characterizeo by K_2O/Na_2O>1,Na_2O<K_2O,σ=3.34-6. 06,DI=65.50-91.09.The glassy volcanics are raw materials for swelling perlite, bentonite and zeolitic rocks, and can be used as volcanic ash materials.
出处
《山东地质》
1992年第1期53-67,共15页
Geology of Shandong