Major and trace element data for plagioclase and whole-rock samples from Japan, sampled from the GEOROC online database (NERC Grant NE/P017452/1)

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.

Date (Creation): 2023-10-24

Identifier: http://data.bgs.ac.uk/id/dataHolding/13608140

Originator

University of Exeter - Williamson, Dr B J ( Camborne School of Mines )

Distributor

British Geological Survey - Enquiries

Point of contact

British Geological Survey - Enquiries

Maintenance and update frequency: notApplicable notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

NGDC Deposited Data
Porphyry mineral deposits
Plagioclase
Whole rock analysis

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

Access constraints: otherRestrictions Other restrictions

Other constraints: licenceOGL

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints: otherRestrictions Other restrictions

Other constraints: 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.

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Metadata language: EnglishEnglish

Topic category

Geoscientific information

Geographic identifier

IZU-BONIN ARC [id=926430]

Date (Creation): 1979

Geographic identifier

JAPAN [id=540000]

Date (Creation): 1979

Geographic identifier

Date (Revision): 2009

Geographic identifier

JPN

Date (Revision): 2009

Geographic identifier

PACIFIC OCEAN [id=2002258]

Date (Revision): 2010

Begin date: 2017-01-01

End date: 2017-08-01

Unique resource identifier: WGS 84 (EPSG::4326)

Distribution format

Microsoft Excel ()

Distributor

British Geological Survey - Enquiries

OnLine resource: Data ( WWW:DOWNLOAD-1.0-http--download )

Hierarchy level: dataset Dataset

Other: dataset

Conformance result

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: 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.).