2026-10-13T21:31:27Z https://www.scidb.cn/oai

10.57760/sciencedb.011bl 2026-09-03T11:09:57Z

2026-09-03 LA-ICP-MS In Situ Trace Element Dataset of 21 Microanalytical Spots from Calcite Cements (Cal-1, Cal-2, and Cal-3) Filling Karst Pores and Fractures in the Ordovician Majiagou Formation doi:10.57760/sciencedb.011bl en This dataset presents in situ LA-ICP-MS geochemical data of calcite cements filling karst pores and fractures in the Ordovician Majiagou Formation, southern margin of the Ordos Basin. A total of 21 microanalytical spots were analyzed, providing trace element, rare earth element (REE), and PAAS-normalized geochemical compositions. These data contribute to tracing the evolution of mature epigenic karst systems and elucidating the mechanisms controlling karst reservoir development. Ordovician; Majiagou Formation; karst reservoir; calcite cement; LA-ICP-MS; trace elements; rare earth elements (REEs); PAAS normalization hu yang xiao PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank