CAJ | 학술논문

在青海泽库县多福屯乡地区发育一套钠质碱性基性火山岩系，为了探讨该套火山岩的构造环境，在野外实地调查中，详细划分了其岩石组合类型，并通过采集大量的样品，从岩石学、岩石地球化学、形成时代等方面，对火山岩进行了综合分析研究。结果表明：该火山岩似OIB性质的陆内火山岩，源区具有DM与EMⅡ混合特点，取得的同位素成果为116—121Ma（U—Pb），时代属早白垩世。经过详细的调查研究，将该火山岩建造命名为麦秀群（K1M）多禾茂组，其形成环境为陆内拉张环境下（大陆裂谷）的岩浆活动产物。
재청해택고현다복둔향지구발육일투납질감성기성화산암계，위료탐토해투화산암적구조배경，재야외실지조사중，상세화분료기암석조합류형，병통과채집대량적양품，종암석학、암석지구화학、형성시대등방면，대화산암진행료종합분석연구。결과표명：해화산암사OIB성질적륙내화산암，원구구유DM여EMⅡ혼합특점，취득적동위소성과위116—121Ma（U—Pb），시대속조백성세。경과상세적조사연구，장해화산암건조명명위맥수군（K1M）다화무조，기형성배경위륙내랍장배경하（대륙렬곡）적암장활동산물。
A sodic alkaline basic volcanic rock set outcrops in Duofutun area, Zeku County, Qinghai Province. In order to explore the tectonic setting of volcanic units in the field survey, the combination of rock types was classified. A large number of samples were collected. From the petrology of volcanic rocks, geochemistry and formation age of these aspects, a comprehensive analysis was carried out. The results show that the volcanic nature of the land within the OIB like volcanic source has mixed characteristics of DM and EMII. Results obtained by isotope 116 - 121Ma （U -Pb） indicates the volcanic rock set belongs to an Early Cretaceous age. It is the outcome of continental rift valley. The rock association is denominated for Duohemao Formation, Maixiu Group.