The petro-chemical and geochemical data of the volcanic rocks indicate that they belong to subalkaline series and show the evolutional trend of calc-alkaline volcanic rocks, and are characteristics of the medium-K to high-K calc-alkaline series. 火山岩的岩石化学和地球化学研究表明,晚三叠世火山岩属于亚碱性系列,并具有钙碱性系列演化特征,位于中钾和高钾钙碱性岩系列范围。
The geological characteristics and origin of gold deposits related to subalkaline rocks in northern Hebei Province 冀西北与偏碱性岩有关的金矿床地质特征及成因
Plate tectonics background and magmatic evolution of subalkaline-alkaline rocks in the middle part of South Qingling 南秦岭中段亚碱性-碱性岩板块构造环境及岩浆演化
Geochemistry of Triassic alkaline or subalkaline igneous complexes in the yan-liao area and their significance 燕辽三叠纪碱性偏碱性杂岩体地球化学特征及意义
The hypabyssal igneous rocks belong to subalkaline alkaline or high potassic calc alkaline series. Their 40Ar/ 39Ar ages are from 260 Ma to 290 Ma. 浅侵位岩浆岩属偏碱性、碱性岩石或高钾钙碱性系列岩石,40Ar/39Ar年龄范围为260~290Ma。
Early Cretaceous basalts occurring in Xiaotian basin, North Huaiyang region show transitional character of alkaline to subalkaline series. 产出于北淮阳地区晓天盆地的早白垩世玄武岩的主量元素具有碱性系列和亚碱性系列过渡的特征。
The studies show that the rocks in Okinawa Trough is of a subalkaline rock series. The basic rocks belong to a transitional form between tholeiite series and calc alkalic series while most of the intermidiate rocks and acid rocks belong to calc alkalic series. 研究表明,冲绳海槽火山岩均属亚碱性系列,基性岩具有拉斑玄武岩系列和钙碱性系列的过渡性,中、酸性岩多属钙碱性系列;