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Hematite and goethite oxygen isotope data from the Spence and Cerro Colorado porphyry copper deposits, Central Andes

This spreadsheet contains 21 oxygen isotope measurements for hematite and mixed hematite/goethite samples from the supergene profiles of the Spence and Cerro Colorado porphyry copper deposits in the Central Andes. Columns are also included which contain calculated isotopic values for weathering fluids which were present at the time of iron oxide formation. These data are presented and discussed in the G-cubed paper 'A rusty record of weathering and groundwater movement in the hyperarid Central Andes' (Shaw et al., 2021). Weathering fluid isotopic values are calculated using the published fractionation factors of Clayton & Epstein (1961), Yapp (1990) and Bao & Koch (1999). The authors have the most confidence in the fluid values obtained using the fractionation factor of Yapp (1990), for reasons outlined in the publication.

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Identification info

Metadata Language
English (en)
Dataset Reference Date ()
2021-06-28
Identifier

http://data.bgs.ac.uk/id/dataHolding/13607784

 

University of Bristol

-

Joseph Shaw

(

PhD student, School of Earth Sciences

)

Wills Memorial Building, Queens Road

,

Bristol

,

BS8 1RJ

,
 

British Geological Survey

-

Enquiries


 

British Geological Survey

-

Enquiries


Maintenance and update frequency
notApplicable
GEMET - INSPIRE themes
  • Geology
BGS Thesaurus of Geosciences
  • Porphyry copper deposits

  • Oxygen isotopes

  • Iron oxides

  • Hematite

  • Goethite

  • Weathering

Keywords
  • NERC_DDC

Limitations on Public Access
otherRestrictions
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 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]"

Spatial representation type
textTable
Topic category
  • Geoscientific information
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S
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Begin date
2018-05-02
End date
2020-01-29
 

Spatial Reference System

No information provided.

Distribution Information

Data format
  • MS Excel

    ()

Resource Locator
Data
Resource Locator
Data
 
Quality Scope
dataset
Other

dataset

Report

Dataset Reference Date ()
2011
Explanation

See the referenced specification

Degree

Report

Dataset Reference Date ()
2010-12-08
Explanation

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

Degree
Statement

Oxygen isotope analysis of 21 hematite(goethite) samples (Spence, 15; Cerro Colorado, 6) was conducted at the SUERC Stable Isotope Facility (East Kilbride) via laser fluorination (e.g. Guiliani et al., 2005). For each measurement, 3–5 mg of hematite(goethite) was heated with a CO2 laser in the presence of a fluorine-based reagent (ClF3). After passing through an in-line Hg-diffusion pump, liberated oxygen was converted to CO2 using a heated rod of platinised graphite. Isotopic measurements were made using a BG Optima dual-inlet mass spectrometer. Isotopic values were calculated using the mass measurements of CO2 isotopologues and are reported as δ18O ‰ vsmow. Calibration on three secondary standards (UWG2, GP147 (international garnet standards), YP2 (internal quartz standard)) gave a standard error of 0.07 and R2=0.9999. Internal uncertainty on the isotopic measurements is <0.1 ‰ (1σ).

Metadata

File identifier
c68b8657-2491-5206-e054-002128a47908 XML
Metadata Language
English (en)
Resource type
dataset
Metadata Date
2023-01-23
Metadata standard name
UK GEMINI
Metadata standard version

2.3

 

British Geological Survey


Environmental Science Centre,Keyworth

,

NOTTINGHAM

,

NOTTINGHAMSHIRE

,

NG12 5GG

,

United Kingdom

+44 115 936 3100
 
 

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