Whole rock geochemistry and stable isotopes of rocks, fragments and foraminifers from two ODP Leg 166 holes

Total carbon and carbonate contents, quantitative carbonate mineralogy, trace metal concentrations, and stable isotope compositions were determined on a suite of samples from the Miocene sections at Sites 1006 and 1007. The Miocene section at Site 1007, located at the toe-of-slope, contains a relatively high proportion of bank-derived components and becomes fully lithified at a depth of ~300 meters below seafloor (mbsf). By contrast, Miocene sediments at Site 1006, situated in Neogene drift deposits in the Straits of Florida and composed primarily of pelagic carbonates, do not become fully lithified until a depth of ~675 mbsf. Diagenetic and compositional contrasts between Sites 1006 and 1007 are reflected in geochemical data derived from sediment samples from each site.本数据集对1006和1007站位的中新统剖面系列样品开展了分析测试，测定指标包括总碳与碳酸盐含量、定量碳酸盐矿物组成、痕量金属浓度以及稳定同位素组成。位于坡脚的1007站位中新统剖面，其沉积物中浅滩成因组分占比相对较高，且在海底以下约300米（meters below seafloor，mbsf）处即完全固结成岩。与之形成鲜明对比的是，地处佛罗里达海峡新近纪漂移沉积环境的1006站位，其沉积物以远洋碳酸盐为主要组分，直至海底以下约675 mbsf处才完全固结成岩。1006与1007站位之间的成岩作用与组成特征差异，可通过两个站位沉积物样品的地球化学数据得到直观反映。