0b5eea83-19dc-5017-e063-0937940ad151 English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-15 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608140 WGS 84 (EPSG::4326) Major and trace element data for plagioclase and whole-rock samples from Japan, sampled from the GEOROC online database (NERC Grant NE/P017452/1) 2023-10-24 creation http://data.bgs.ac.uk/id/dataHolding/13608140 Major and trace element data for plagioclase and whole-rocks from Japan sampled and filtered from the GEOROC online database (http://georoc.mpch-mainz.gwdg.de/georoc, state: 1 January 2017). The data was used to test the recently developed plagioclase porphyry indictor mineral, as described in Williamson et al. (2016, Nature Geoscience, 9: 237-241), on samples from Japan. Japan is considered a negative control as it has no known porphyry deposits, despite showing favourable geology. The data was used in Williamson B.J., Hodgkinson M., Imai A., Takahashi R., Armstrong R.N., Herrington, R.J., 2018. Testing the Plagioclase Discriminator on the GEOROC Database to Identify Porphyry-Fertile Magmatic Systems in Japan, Resource Geology, 68: 138-143. Williamson, Dr B J University of Exeter Camborne School of Mines not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/0b5eea83-19dc-5017-e063-0937940ad151.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Porphyry mineral deposits Plagioclase Whole rock analysis BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation IZU-BONIN ARC [id=926430] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation JAPAN [id=540000] ISO 3166_1 alpha-2 2009 revision JP ISO 3166_1 alpha-3 2009 revision JPN British Geological Survey Gazetteer: Gazetteer of sea areas 2010 revision PACIFIC OCEAN [id=2002258] 129.0500 146.7800 30.2500 45.4000 2017-01-01 2017-08-01 Microsoft Excel witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item183112 WWW:DOWNLOAD-1.0-http--download Data download dataset dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Data for “convergent margin” settings only were used. For quality control, data were filtered for oxide wt % totals of between 98.5 and 101.5 and then for data points with K2O < 1.2 and FeO < 1.2 wt %, to exclude K-feldspar and reduce the likelihood of including data affected by alteration (phyllic or propylitic). Any data from samples labelled as altered in any way were omitted. The data were then filtered for total cations (a.p.f.u.) of between 4.98 and 5.02 to exclude poor-quality data. Records for plagioclase from inappropriate rock types were removed. Excess Al (Al*) was calculated such that Al* = (Al/(Ca +Na + K)) − (0.01*An). For whole-rock geochemical data, the GEOROC database was first filtered for data from Japan and “convergent margin” settings. The data were then filtered, as much as possible, according to the criteria by Loucks (2014, Aust. J. Earth Sci., 61, 5–16.).