Hornblende 40Ar/39Ar dates for Miocene sediment samples collected at Site U1521 during International Ocean Discovery Program (IODP) Expedition 374 to the Ross Sea, Antarctica
This dataset comprises 40Ar/39Ar dated detrital hornblende grains for 5 samples from IODP Expedition 374 Site U1521 to the Ross Sea, collected on the RV JOIDES Resolution. Shipboard biostratigraphy and magnetostratigraphy suggests the samples are early Miocene in age (McKay et al., 2019, Proceedings of the International Ocean Discovery Program). These data can be compared to terrestrial geochronological data, allowing the changing provenance of the sediments to be traced.
dataset
:
http://data.bgs.ac.uk/id/dataHolding/13607797
English
Geoscientific information
GEMET - INSPIRE themes, version 1.0:
BGS Thesaurus of Geosciences:
NGDC Deposited Data
Miocene
Geochronology
Provenance
Sedimentary history
Free:
Free:
NERC_DDC
-179.6700,
-75.6800,
-179.6800,
-75.6700
ROSS SEA [id=2001391]
creation: 2021-05-19
2020-01
-
after
vector
Imperial College London
James Marschalek
Royal School of Mines, Prince Consort Road,
London,
SW7 2BP
email:
not available
Role: originator
Lamont-Doherty Earth Observatory of Columbia University
Sidney Hemming
P.O. Box 1000, 61 Route 9W, Palisades,
New York,
United States
email:
not available
Role: originator
British Geological Survey
Enquiries
email:
not available
Role: distributor
British Geological Survey
Enquiries
email:
not available
Role: point of contact
Data Quality
Hornblende grains were picked from the magnetic separate of samples prepared for U-Pb dating of zircons (150-300 µm size fraction). The samples were co-irradiated with Fish Canyon sanidine (28.201 ± 0.046 Ma) (Kupier et al., 2008, Science) for 8 hours in the CLICIT (Cadmium Lined In-Core Irradiation Tube) facility at Oregon State University reactor. Samples were loaded into planchettes, evacuated in a chamber with a ZnSe window, then heated with a CO2 laser to release the gas. Samples were exposed to hot Zr-Al getters to remove reactive gases, and the inert gases were let into a VG5400 noble gas mass spectrometer and measured with peak hopping on an analogue multiplier in static vacuum mode. Backgrounds were corrected based on frequent measurements of blanks (~ every 4 unknowns) and mass discrimination was corrected based on measurements of air (~ every 12 unknowns). Corrections for nuclear interferences are based on reported measurements from the Berkeley Geochronology Lab (Renne, 1995, EPSL). Analyses and data reduction were performed using MassSpec, a program written by Al Deino at the BGC. Errors are reported at 1 sigma.
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
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
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.
Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear.
Metadata about metadata
cb69365d-33db-2efb-e054-002128a47908
British Geological Survey
Environmental Science Centre,Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: +44 115 936 3100
email:
enquiries@bgs.ac.uk
Role: point of contact
2024-04-24