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

弧火山岩相对洋中玄武岩的~（34）S富集 δ-S34地幔值的不均一性， 归因于俯冲的ocenaic地壳。最近 然而，阿尔特博士的研究表明， 地壳本身无法解释这些观测结果。他计划 寻找硫及其同位素的来源 沉积物随火成岩沿着进入海沟 地下岩石他将研究整个远洋柱及其 大洋钻探计划第129航次3个地点的孔隙沃茨 在西太平洋，定义硫预算范围内， 沉积柱，并确定低温的影响 地壳上部硫的变质作用。

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.