CAJ | 학술논문

巴塘群火山岩主要由基性玄武岩-中性安山岩-流纹岩组成，构成一套从基性到中性到酸性的岩石组合，具较完全的演化序列。岩石化学表现为表现为低 TiO2（＜1%），高 Al；稀土元素特征表现为轻稀土元素富集；在微量元素地球化学方面，表现为富集大离子亲石元素，亏损高场强元素，εNd(t)变化在-0.3~2.9之间，εSr(t)变化在14.4~39.2之间，表现为弧火山岩特征，为拉竹龙－金沙江洋盆（或甘孜—理塘洋）向南消减的产物。
파당군화산암주요유기성현무암-중성안산암-류문암조성，구성일투종기성도중성도산성적암석조합，구교완전적연화서렬。암석화학표현위표현위저 TiO2（＜1%），고 Al；희토원소특정표현위경희토원소부집；재미량원소지구화학방면，표현위부집대리자친석원소，우손고장강원소，εNd(t)변화재-0.3~2.9지간，εSr(t)변화재14.4~39.2지간，표현위호화산암특정，위랍죽룡－금사강양분（혹감자—리당양）향남소감적산물。
Batang group volcano rock is mainly composed of basalt-andesite rhyolite, formed from a set of basic to neutral to acidic rock combination, with the sequence evolution is more complete. Petrochemistry showed low TiO2 (less than 1 wt%), high Al; the characteristics of rare earth elements showed enrichment of light rare earth ele-ments; in the trace element geochemistry, the performance for the enrichment of large ion lithophile elements, de-pleted in high field strength elements, εNd (t) is -0.3 ~ 2.9, εSr (t) is 14.4 ~ 39.2, all the above geochemical characteristics indicate those rocks were formed in volcano arc environment, is product of the Lazhulong- Jinsha River ocean (or Ganzi-Litang ocean) southward subduction.