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Global Whole-Rock Geochemical Database Compilation

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Global Whole-Rock Geochemical Database Compilation Earth Syst. Sci. Data, 11, 1553–1566, 2019 https://doi.org/10.5194/essd-11-1553-2019 © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License. Global whole-rock geochemical database compilation Matthew Gard1, Derrick Hasterok1,2, and Jacqueline A. Halpin3 1Department of Earth Sciences, University of Adelaide, North Terrace, SA, 5005, Australia 2Mawson Centre for Geoscience (MCG), University of Adelaide, North Terrace, SA, 5005, Australia 3Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, TAS, 7001, Australia Correspondence: Matthew Gard ([email protected]) Received: 19 March 2019 – Discussion started: 17 April 2019 Revised: 5 August 2019 – Accepted: 2 September 2019 – Published: 17 October 2019 Abstract. Collation and dissemination of geochemical data are critical to promote rapid, creative, and accurate research and place new results in an appropriate global context. To this end, we have compiled a global whole- rock geochemical database, sourced from various existing databases and supplemented with an extensive list of individual publications. Currently the database stands at 1 022 092 samples with varying amounts of associated sample data, including major and trace element concentrations, isotopic ratios, and location information. Spatial and temporal distribution is heterogeneous; however, temporal distributions are enhanced over some previous database compilations, particularly in ages older than ∼ 1000 Ma. Also included are a range of geochemical indices, various naming schema, and physical property estimates computed on a major element normalized version of the geochemical data for quick reference. This compilation will be useful for geochemical studies requiring extensive data sets, in particular those wishing to investigate secular temporal trends. The addition of physical properties, estimated from sample chemistry, represents a unique contribution to otherwise similar geochemical databases. The data are published in .csv format for the purposes of simple distribution, but exist in a structure format acceptable for database management systems (e.g. SQL). One can either manipulate these data using conventional analysis tools such as MATLAB®, Microsoft® Excel, or R, or upload them to a relational database management system for easy querying and management of the data as unique keys already exist. The data set will continue to grow and be improved, and we encourage readers to contact us or other database compilations within about any data that are yet to be included. The data files described in this paper are available at https://doi.org/10.5281/zenodo.2592822(Gard et al., 2019a). 1 Introduction as X-ray fluorescence (XRF) and inductively coupled plasma mass spectrometry (ICP-MS), and thus modern publications are swiftly expanding our cumulative global data records. Geochemical analyses in conjunction with other temporal, However, due to the rate of new publications in conjunction spatial, and physical property information have been vital with significant partitioning between different journals, these sources of information for understanding the Earth and in- data are not always easy to find and can be incredibly time- vestigating both local and global geodynamic histories (e.g. consuming to collate. It is pertinent that this information be Keller and Schoene, 2018). Effective collection, collation, readily available for future studies, as all benefit from taking and dissemination of this type of data are critical to pro- advantage of the full suite of data available to produce more mote rapid, creative and accurate research. Every year, the robust models and constrained analyses. amount of data recorded globally increases, dispersed among Geochemical compilations have been used in a range of many hundreds of individual publications. Since the 1960s studies, from examining crustal magma reservoirs (e.g. Car- and 1970s, broad element suites have been promptly accu- botte et al., 2013), proposing changes in mantle dynamics mulated due to the commercial availability of methods such Published by Copernicus Publications. 1554 M. Gard et al.: Global whole-rock geochemical database compilation (e.g. Iwamori and Nakamura, 2015), looking at regional and organic components. (http://www.earthchem.org/seddb, global tectonic histories (e.g. Keller and Schoene, 2018), to last access: 25 March 2017). examining the connections between life and the solid Earth (e.g. Cox et al., 2018). This information has implications not – MetPetDB is a database for metamorphic petrology, in only for the scientific community, but also for issues such as a similar vein to PetDB and SedDB. This database also environmental management, land use, and mineral resource hosts large swathes of images collected through various development. methods such as X-ray maps and photomicrographs, In this paper we present a global whole-rock geochemical although this information is not utilized in this paper database compilation consisting of modified whole-rock sub- (http://metpetdb.com/, last access: 3 June 2019). sets from existing database compilations, in conjunction with – The USGS National Geochemical Database archives significant supplementation from individual publications not geochemical information and its associated metadata yet included in these other collections. Additionally, we have from USGS studies and made available online generated naming schema, various geochemical indices, and (https://www.usgs.gov/energy-and-minerals/ other physical property estimates, including density, seismic mineral-resources-program/science/ velocity, and heat production for a range of the data contained national-geochemical-database, last access: 9 Oc- within. tober 2019). 2 Existing initiatives Many other government initiatives and national databases exist, with notable examples including PETROCH from the Many existing initiatives have worked to construct and main- Ontario Geological Survey (Haus and Pauk, 2010), New tain database compilations with great success, but often re- Zealand’s national rock database (Petlab) (Strong et al., strict themselves to certain tectonic environments or regimes, 2016), Australia’s national whole-rock geochemical database regions, or rock types. EarthChem (https://www.earthchem. (OZCHEM) (Champion et al., 2016), the Finnish litho- org, last access: 25 March 2017) is currently the most notable geochemical rock geochemistry database (RGDB) (Rasi- general use geochemical data repository. It consists of many lainen et al., 2007), the Newfoundland and Labrador Geo- federated databases such as NAVDAT, PetDB, GEOROC, science Atlas (Newfoundland and Labrador Geological Sur- SedDB, MetPetDB, and the USGS National Geochemical vey, 2010), and the basement rock geochemical database of Database, as well as other individually submitted publica- Japanese islands (DODAI) (Haraguchi et al., 2018). tions. The constituent databases are mostly more specialized While all of these are generally exceptional enterprises, compilations, for example the following: we personally found that the variety of structures was cum- bersome to reconcile or otherwise deficient in some respect – The North American Volcanic and Intrusive Rock for our own research. Some examples included databases be- Database (NAVDAT) has existed since 2002 and is pri- ing deficient in aged data (1000 MaC) or lacking many re- marily aimed at geochemical and isotopic data from cent publications. Some issues in certain existing databases Mesozoic and younger igneous samples of western were also evident; we found many samples missing informa- North America (Walker et al., 2006)(http://www. tion available in the original individual publications. It was navdat.org/, last access: 9 October 2019). quite common for age resolutions to be significantly larger than the values quoted within the paper itself, of the order of – The Petrological Database of the Ocean Floor (PetDB) hundreds of millions of years in some cases or not included is the premier geochemical compilation suite for the at all because they were not found in a table but within the igneous and metamorphic hosted data from mid-ocean text itself. ridges, back-arc basins, sea mounts, oceanic crust, and Thus, we sought to produce a database incorporating re- ophiolites (https://www.earthchem.org/petdb, last ac- fined samples from previous databases and supplementing cess: 9 October 2019). significantly from other, often recent, publications. Com- – Geochemistry of Rocks of the Oceans and Continents puted properties, naming schemes, and various geochemi- (GEOROC) is a more holistic compilation effort of cal indices have also been calculated where the data per- chemical, isotope, and other data for igneous sam- mit. Smaller subsets of previous iterations of this database ples, including whole-rock, glass, minerals and inclu- have already been utilized for studies of heat production and sion analyses and metadata (http://georoc.mpch-mainz. phosphorus content (Hasterok and Webb, 2017; Hasterok gwdg.de, last access: 9 October 2019). et al., 2018; Cox et al., 2018; Gard et al., 2019b; Hasterok et al., 2019b), and this publication represents the totality of – SedDB focuses on sedimentary samples, primarily from geochemical information gathered. As an ongoing process marine sediment cores. It has been static since 2014 we have corrected some errors or omissions from previous and includes information such as major and trace ele- databases as we have come across them, but we have not
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