四川金阳地区水系沉积物磷元素地球化学特征及地质意义

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摘 要:通过对四川金阳地区1∶200000和1∶50000水系沉积物磷元素等地球化学特征进行对比研究,发现测区磷元素富集特征,在峨眉山玄武岩和麦地坪亚段地层中背景值较高,且在麦地坪亚段地层富集成矿。另外,磷异常与峨眉山玄武岩地层出露吻合较好,这对峨眉山玄武岩的圈定有一定的指示作用。
关键词:1∶50000水系沉积物测量;磷异常;峨眉山玄武岩;麦地坪亚段;磷矿
中图分类号:P632 文献标志码:A 文章编号:2095-2945(2022)19-0078-06
Abstract: Based on the comparative study of the geochemical characteristics of phosphorus elements in 1:200000 and 1:50000 stream sediments in Jinyang, Sichuan Province, it is found that the characteristics of phosphorus enrichment in the survey area are higher in Emeishan basalt and Maidiping subformation, and enriched and mineralized in the Maidiping submember. In addition, the phosphorus anomaly is in good agreement with the exposure of Emeishan basalt strata, which can indicate the delineation of Emeishan basalts to a certain extent.
Keywords: 1:50000 stream sediment survey; phosphorus anomaly; Emeishan basalt; Maidiping submember; phosphate rock
1 简介
四川金阳地区地处四川乌蒙山扶贫开发攻坚示范区南部,行政区划隶属四川省凉山彝族自治州金阳县、布拖县、普格县和雷波县所辖。(剩余4743字)