麦哲伦海山区维嘉平顶海山群富钴结壳伴生有用元素空间分布特征

摘要

Spatial distribution of associated useful elements (REE,PGE,W,Mo,Au,Te) in Co-rich Crusts from Weijia guyots in Magellan Seamounts is studied in this paper.The study shows that the distribution of associated useful elements is highly uneven in Weijia Guyots.But generally,distribution is paralleled to the water depth,except that a few areas show patch distribution.Enrichment areas of different associated useful elements are different.REE and PGE are enriched on the southern and southwestern slope,while W and Mo are enriched on the northwestern and eastern slope.Au is enriched on the southeastern slope.But the content of Te element is the same on each side of slopes.As the water depth increases,the content of REE and PGE ascend to maximum and then descend gradually.The content of W,Mo,Au and Te ascend first,then descend a little,and ascend again as the water depth increases.%本文对麦哲伦海山区维嘉平顶海山群富钴结壳样品中的伴生有用元素(REE、PGE、W、Mo、Au、Te)的空间分布特征进行了研究.研究表明:富钴结壳伴生有用元素在平面上的分布极不均匀,但多以条带状平行水深等深线分布,也有少数区域表现为斑块状分布,且不同的伴生有用元素的富集区域有所差别;REE和PGE主要在南部和西南部斜坡发育,而W、Mo则主要富集于西北部和东部斜坡,Au集中发育在东南部的海斜坡上,Te的分布呈斑块状富集于各向斜坡.随着水深增加,REE和PGE呈现出由最高含量降低后逐渐升高的变化趋势,W、Mo、Au、Te则随着水深增加含量由低升高,后略有降低,再小幅升高的变化趋势.