DOI: 10.1594/pangaea.935649
title: MARHYS Database 2.0

description: This is version 2.0 of MARHYS (MARine HYdrothermal Solutions) database. The database is a global compilation of marine hydrothermal vent fluid compositions. The database includes data presented in journal publications, book chapters and monographs and includes compositions of hydrothermal fluids, end members and background seawater. Detailed sample information (metadata) is provided along with the chemical composition, which enables the unique identification of discrete vent fluid samples. The database contains concentrations of major-, minor- and trace elements, as well as, reduced carbon compounds and isotope compositions. All concentrations are converted into units per kg of vent fluid and chemical data of unique samples reported in different publications are merged into unique sample entries.In brief, the following changes have been applied in the course of compilation of MARHYS database version 2.0 compared to version 1.0: A large number of new vent sites from the following regions is now incorporated in the database: southern Mid Atlantic Ridge, Arctic Mid Ocean Ridge, Juan de Fuca Ridge, Okinawa Trough, Lau Basin, Manus Basin, and some more (The database has grown about nearly 50% and now contains 3394 merged entries, compared to 2374 merged entries in Version 1.0). The complete sample information section for a larger number of entries was overhauled to achieve more consistency between different datasets and within individual vent sites (additional Sample IDs have been adjusted to fit the database naming scheme and to ensure unique sample entries). Some new species were included. A small number of faulty concentrations were detected and corrected. A number of vent areas in the Manus Basin were erroneously classified in Version 1.0 and are now re-classified as back-arc spreading centres (Susu, Desmos, PACMANUS). The shape of the spreadsheet was improved by freezing the "Sample ID" column, as well as, the parameter and unit rows to provide users more comfort when browsing the database. The built-in Excel filter function is now turned on by default (row 14), enabling users to easier generate sub-datasets of interest.
description: The main file containing the final product is:MARHYS_DB_2_0.xlsxThe remaining files are provided to be able to track the processing of the data:MARHYS_DB_2_0_Rawdata.xlsx provides a one-by-one copy of the single datasets as provided in the original source.MARHYS_DB_2_0_RawdataConverted.xlsx provides a one-by-one copy of the single datasets with converted units.MARHYS_DB_2_0_Unmerged.xlsx provides the data in the format of MARHYS Database without sample entries being merged.MARHYS_DB_2_0_MergeHistory.xlsx provides a list of all sample entries that were merged.MARHYS_DB_2_0_ReferenceList.docx provides a list of all sample entries that were merged.Please note: Please always cite the base publication (Diehl & Bach, 2020; doi:10.1029/2020GC009385) along with this dataset. We encourage users of the database to also cite the original literature whenever possible. If you want to adress any inquiries about the database do not hesitate to contact the support center (marhys@uni-bremen.de). The database is an ongoing project and will be updated twice a year.