Major and trace element analyses of volcanic rocks from the Galapagos Archipelago / Galapagos Islands

Abstract: This dataset contains major and trace element analyses of volcanic rocks from the Galapagos Archipelago, selected from across the region to be representative of the geochemical variation in the hotspot system. The goal of the project is twofold: a) to assemble a dataset of radiogenic isotope ratios performed at a high and consistent level of precision; and b) to compare radiogenic isotope ratios with recent Hawaii isotopic signatures. To build a complete dataset, we selected the samples from across the archipelago from existing collections, in addition to new samples from Espanola, San Cristobal, and Santa Cruz Islands. Any samples that were missing published major and full suites of trace element data were also analyzed for those missing data. The samples analyzed at Colgate University for majors by XRF and for trace elements by ICP-MS are included here (i.e., new data).

Other Description: Harpp, K., Weis, D. (2020), "Insights into the Origins and Compositions of Mantle Plumes: A Comparison of Galápagos and Hawai’I", G-Cubed (in review)

摘要：本数据集包含加拉帕戈斯群岛火山岩的主量元素与微量元素分析数据，样本覆盖群岛全域，以充分代表该热点系统的地球化学变异特征。本项目的目标分为两点：a）构建一套以高精度且一致的测试精度测定的放射成因同位素比值数据集；b）将放射成因同位素比值与近期报道的夏威夷同位素特征进行对比。为构建完整数据集，我们除采集埃斯帕尼奥拉岛、圣克里斯托瓦尔岛与圣克鲁斯岛的新样本外，还从群岛全域的现有馆藏中选取了已有样本。对于缺少已发表主量元素及全套微量元素数据的样本，我们也针对其缺失的相关数据开展了分析测定。本数据集纳入了在科尔盖特大学采用XRF（X射线荧光光谱法）测定主量元素、采用ICP-MS（电感耦合等离子体质谱法）测定微量元素的样本（即新测得的数据）。

其他说明：Harpp K.、Weis D.（2020），《地幔柱起源与组成的新认知：加拉帕戈斯与夏威夷对比研究》，G-Cubed（待评审）