Identification

Title

Major and trace element composition of whole-rock samples from breccias around Mauze and Nkalonje (NERC Grant NE/R013403/1)

Abstract

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

Resource type

dataset

Resource locator

https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item182530

name: Data

function: download

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13608136

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Breccia

NGDC Deposited Data

originating controlled vocabulary

title

reference date

date type

revision

effective date

2022

Keyword set

keyword value

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

35.8200

East bounding longitude

35.8300

North bounding latitude

-15.7000

South bounding latitude

-15.7100

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

MALAWI [id=679000]

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

MW

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

MWI

Temporal reference

Temporal extent

Begin position

2018-07-01

End position

2020-10-01

Dataset reference date

date type

creation

effective date

2023-09-03

Frequency of update

notApplicable

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

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

Data format

name of format

MS Excel

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

Responsible organisations

Responsible party

contact position

Camborne School of Mines

organisation name

University of Exeter

full postal address

Tremough Campus

Exeter

email address

not available

responsible party role

originator

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

distributor

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

Environmental Science Centre,Keyworth

NOTTINGHAM

NG12 5GG

United Kingdom

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2025-03-24

Metadata language