The Sulfur Budget for a Pelagic Sediment Section, ODP Leg 129: Effect of Sediments on Cycling of Sulfur in SubductionZones

弧火山岩相对于中洋玄武岩的34s富集和三角洲- s34地幔值的非均质性是由俯冲的洋新纪地壳贡献的。然而，阿尔特博士最近的研究表明，海洋地壳的变化本身并不能解释这些观察结果。他计划在沉积物中寻找硫的来源及其同位素，这些沉积物与火成岩一起被带入海沟。他将在西太平洋海洋钻探计划129号项目的3个地点检查整个远洋柱及其孔隙水，确定沉积物柱内的硫预算，并确定低温变质作用对最上层地壳中硫的影响。

The 34S-enrichment of arc volcanics relative to Mid-Ocean Basalt and the heterogeneity of mantle values of delta-S34 have been ascribed to contributions from subducted ocenaic crust. Recent work by the Dr. Alt has shown, however, that altered oceanic crust by itself cannot account for these observations. He plans to look for these sources of sulfur and its isotopes in the sediments that are carried into the trench along with igneous basement rocks. He will examine the entire pelagic column and its pore waters at 3 sites from Leg 129 of the Ocean Drilling Program in the western Pacific, define the sulfur budget within the sediment column, and determine the effects of low-temperature metamorphism on sulfur in the uppermost crust.