40Ar-39Ar ages of ice-rafted sand-sized hornblende and mica deposited in Iceberg Alley (NERC Grant NE/T006609/1)
40Ar/39Ar ages of 37 mica and 21 hornblende from the sand-sized fraction of an iceberg-rafted debris-rich layer deposited in the Scotia Sea at IODP Site U1538 ~1.2 million years ago during the early Pleistocene.
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2022-08-15
- Maintenance and update frequency
- notApplicable
- GEMET - INSPIRE themes
- BGS Thesaurus of Geosciences
-
- Argon isotopes
- Argon argon dating
- Sea ice
- Radiometric dating
- Keywords
-
- NERC_DDC
- Limitations on Public Access
- otherRestrictions
- Other constraints
- licenceOGL
- 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
- vector
- Topic category
-
- Geoscientific information
- Extent
-
SCOTIA SEA [id=2001393]
- Dataset Reference Date ()
- 2010
N
S
E
W
))
- Begin date
- 2021-05-03
- End date
- 2021-05-17
- Code
- WGS 84 (EPSG::4326)
- 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
- Hornblende, mica and standards were irradiated at the Cd-lined in-core facility at the Oregon State reactor. 40Ar/39Ar ages were obtained using single-step CO2 laser fusion at the Lamont Doherty Earth Observatory argon geochronology lab (Argon Geochronology for the Earth Sciences) to release argon, followed by cleanup with Zr-Ar getters heated at 2-amps. Extracted and cleaned gases were measured on a VG5400 noble gas mass spectrometer in peak hopping mode on an analogue multiplier, using the program Massspec. Nuclear interference corrections used values for OSU from Renne et al. (1998), and data were also corrected for background and mass discrimination using measured blanks and air pipettes. J values used to calculate ages were based on co-irradiated Fish Canyon sanidine standard (28.201 ± 0.046 Ma; Kuiper et al. (2008), with decay constants from Min et al. (2000)).
Metadata
- File identifier
- eabf3873-63d5-23e5-e053-0937940a01a2 XML
- Metadata Language
- English (en)
- Resource type
- dataset
- Metadata Date
- 2023-12-08
- 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