Table DR1. Detrital zircon U-Pb geochronologic analyses (San Luis Reservoir, California, USA)

Seven detrital zircon samples were collected throughout San Luis Reservoir study area for U-Pb isotopic analysis. Zircons were recovered using standard separation techniques (e.g., Gehrels et al., 2008), and a random subset of zircon grains from each sample was mounted in a 1-inch epoxy round with grains of Sri Lanka, FC-1, and R33 primary zircon standards. Sample mounts were polished to a depth of about 20 microns and imaged using backscattered electron imaging to guide selection of spot locations. U-Pb dating was completed at the University of Arizona LaserChron Center using laser ablation inductively coupled plasma mass spectrometry following methods described in Gehrels et al. (2008) and Gehrels and Pecha (2014).The purpose of the dataset was to better understand the provenance of forearc deep-water deposits.本研究于圣路易斯水库（San Luis Reservoir）研究区全域采集7件碎屑锆石（detrital zircon）样品，用于U-Pb同位素分析（U-Pb isotopic analysis）。锆石通过标准分选技术（如Gehrels等，2008）提取；从每件样品中随机选取部分锆石颗粒，与斯里兰卡锆石、FC-1及R33锆石标准样一同镶嵌于1英寸圆形环氧树脂靶中。随后将镶靶抛光至约20微米深度，并通过背散射电子成像（backscattered electron imaging）进行形貌表征，以指导测试点位的选取。U-Pb定年工作在亚利桑那大学LaserChron中心完成，采用激光剥蚀电感耦合等离子体质谱法（laser ablation inductively coupled plasma mass spectrometry），测试方法参照Gehrels等（2008）及Gehrels与Pecha（2014）的研究方案。本数据集旨在深入解析弧前深水沉积的物源特征。