CAJ | 학술논문

玄武质岩浆见于板块构造演化的全过程和各个重要阶段，是所有火成岩中最主要的构造地球化学指示剂，因此，玄武岩类相关元素图解和比值成为研究火成岩成岩作用和形成构造环境判别的首选对象.Ta、Hf、Th、La、Zr、Nb 都是高场强元素和较强不相容元素，由于地球化学性质的相似性和在玄武岩类成岩过程中的规律性变化，所以它们是玄武岩类成因研究和构造环境判别图解中使用频率最高的元素，而且两两元素含量之间的比值能较好地区分其形成时的构造环境.在前人发明的玄武岩类 Th/Hf-Ta/Hf、Th/Zr-Nb/Zr 及 La/Zr-Nb/Zr 双对数判别图解基础上，运用这6个元素两两组对的 Ta/Hf、Th/Ta、Th/Hf、Nb/Zr、Th/Nb、La/Nb 值，建立比值判别表，极好地区分了几乎最常见的各种构造环境中有关的玄武岩类.该比值判别表是对双对数判别图解的极好补充.
현무질암장견우판괴구조연화적전과정화각개중요계단，시소유화성암중최주요적구조지구화학지시제，인차，현무암류상관원소도해화비치성위연구화성암성암작용화형성구조배경판별적수선대상.Ta、Hf、Th、La、Zr、Nb 도시고장강원소화교강불상용원소，유우지구화학성질적상사성화재현무암류성암과정중적규률성변화，소이타문시현무암류성인연구화구조배경판별도해중사용빈솔최고적원소，이차량량원소함량지간적비치능교호지구분기형성시적구조배경.재전인발명적현무암류 Th/Hf-Ta/Hf、Th/Zr-Nb/Zr 급 La/Zr-Nb/Zr 쌍대수판별도해기출상，운용저6개원소량량조대적 Ta/Hf、Th/Ta、Th/Hf、Nb/Zr、Th/Nb、La/Nb 치，건립비치판별표，겁호지구분료궤호최상견적각충구조배경중유관적현무암류.해비치판별표시대쌍대수판별도해적겁호보충.
Basaltic magma,which is found in whole process of plate tectonic evolution and the critical stages,is a most important tectonogeochemical indicator in all igneous rocks.Therefore, the diagrams and ratios of related elements in basalts become the first choice to investigate the igneous diagenesis and tectonic setting.Ta,Hf,Th,La,Zr and Nb,which are high-field strength elements and stronger incompatible elements,have similar geochemical properties and regular changes in basaltic diagenesis,thus,they are most frequently used in basalt genesis and discrimination diagrams of tectonic setting.Moreover,the ratios of contents between the each one of elements can better distinguish the tectonic settings of formation.Based on the double-log discrimination diagrams of Th/Hf-Ta/Hf,Th/Zr-Nb/Zr and La/Zr-Nb/Zr in basalt yielded by previous research,the ratios of Ta/Hf,Th/Ta,Th/Hf,Nb/Zr,Th/Nb,La/Nb values were proposed to distinguish the basalts in various common tectonic settings, and the ratio discrimination table was put forward.The table extremely distinguishes basalt in most common variety of tectonic environments and is a great supplement for the double-log discrimination diagrams.