Collaborative Research: Chlorine Stable Isotope Composition of Subduction Zone Sediments and Pore Waters

9529953个卡斯特纳流体和固体样本将从三个地质、沉积学和水文不同俯冲系统的六个地点进行氯浓度和同位素组成分析：巴巴多斯、南开和马里亚纳。在前人广泛的地质、矿物学、化学和同位素特征的基础上，对孔隙水、沉积物、蚀变玄武岩及其相关矿物分离样品进行了仔细的选择。重点将放在重要和丰富的海底水合硅酸盐上，特别是粘土矿物(如蒙脱石、伊利石、绿泥石)、其他云母、蛇纹石、滑石和角闪石。还将分析自生含水矿物的潜在前体相(例如火山弧形玻璃和凝灰岩)。这一新的数据集将根据动力学同位素浓缩(即扩散)、平流质量传输和流体-岩石反应模型进行解释，并应用于发生在收敛边缘的过程。

9529953 Kastner Fluid and solid samples will be analyzed for Cl concentration and isotopic composition from six sites in three geologically, sedimentology, and hydrologically different subduction systems: Barbados, Nankai, and Mariana. On the basis of previous extensive geologic, mineralogic, chemicals, and isotopic characterizations, samples of pore waters, sediments, altered basalts, and their related mineral separates have been carefully selected for this study. Emphasis will be placed on the important and abundant ocean floor hydrous silicates, especially clay minerals (e.g., smectite, illite, chlorite), other micas, serpentine, talc, and amphibole. Potential precursor phases of authigenic hydrous minerals will also be analzyed (e.g. volcanic arc glass and tuffs). This new data set will be interpreted in terms of kinetic isotopic enrichment (i.e., diffusion), advective mass transport, and fluid-rock reaction models and applied to processes occuring in convergent margins.