Major and trace element composition of whole-rock samples from breccias around Mauze and Nkalonje (NERC Grant NE/R013403/1)
The breccia units at the Songwe Hill / Mauze complex are located at, or close to, the contact between nepheline syenite and the surrounding country rock. They are small, the largest comprising an area no more than ~125 × 125 m, and occur at the top of small hills abutting the larger, steeper, Mauze mountain. Owing to sparse outcrop, many of the available samples are float. On the weathered surface, the rocks are buff-pink in colour, with local black Mn-oxide staining. Most samples are heavily altered and composed predominantly of clay minerals, after K-feldspar, and Fe- and Mn-oxide phases. Geological Magazine (2021) 158 (11): 2025-2041. https://doi.org/10.1017/S0016756821000601
dataset
:
http://data.bgs.ac.uk/id/dataHolding/13608136
English
Geoscientific information
GEMET - INSPIRE themes, version 1.0:
BGS Thesaurus of Geosciences:
Breccia
NGDC Deposited Data
Free:
Free:
NERC_DDC
35.8200,
-15.7100,
35.8300,
-15.7000
MALAWI [id=679000], MW, MWI
creation: 2023-09-03
2018-07-01
-
2020-10-01
University of Exeter
Sam Broom-Fendley
Tremough Campus,
Exeter
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
Six samples were analysed by Intertek-Genalysis, Australia, by ICP-OES and ICP-MS, with powdered samples prepared as sodium peroxide fusions. An additional four analyses was also analysed at Intertek-Genalysis, using the same instrumentation, but with samples instead prepared with Li metaborate. The remaining analyses were undertaken at ALS Loughrea, Ireland, by ICP-OES and ICP-MS. Powders were prepared by dissolution of Li metaborate fusions and by four-acid digestion on unfused powders, the latter technique being used for analysis of Li, Ag, As, Cd, Co, Cu, Mo, Ni, Pb, Sc, Tl and Zn. C and S were analysed using a LECO furnace. Owing to the visibly altered nature of the samples, as well as the heterogeneity when analysing breccia samples, caution is warranted when interpreting the major element data, especially in respect to elements which are mobile in the weathering environment.
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.
Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
licenceOGL
Metadata about metadata
0b5eea83-19d8-5017-e063-0937940ad151
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