Geochemical and mineralogical record of the impact of mining on the Teign Estuary, Devon, UK

DSpace/Manakin Repository

Open Research Exeter (ORE)

Geochemical and mineralogical record of the impact of mining on the Teign Estuary, Devon, UK

Please use this identifier to cite or link to this item: http://hdl.handle.net/10036/3546

Share:                 



Title: Geochemical and mineralogical record of the impact of mining on the Teign Estuary, Devon, UK
Author: Simons, B.
Pirrie, D.
Rollinson, G.K.
Shail, R.K.
Citation: Vol. 12, pp. 339 - 350
Publisher: The Ussher Society
Journal: Geoscience in South-West England
Date Issued: 2011
URI: http://hdl.handle.net/10036/3546
Links: http://www.ussher.org.uk/
Abstract: Previous mineralogical and geochemical studies on the sediments in the Teign Estuary, Devon, UK, have shown that there are elevated levels of barium present within the surface sediments and the river catchment due to historical mining. For this investigation, 8 shallow cores (<1 m) were recovered from various locations in the estuary. These cores were subsequently logged, photographed and divided into approximately 5 cm depth intervals. The geochemistry and mineralogy of 68 samples from the cores were analysed. Bulk sediment geochemistry was determined by XRF and data for Ba, Cu, Pb and Zn are presented here. The mineralogy of the samples was determined by XRD. In addition, the samples from two cores were selected for mineralogical analysis using automated SEM-EDS (QEMSCAN®). The data show a sediment depth related geochemical trend with typically the lowest concentrations of Ba, Cu, Zn and Pb at the bases of the cores. Several of the sampling sites reveal a marked peak in the concentration of Pb and Zn mid-core; however, Cu values are low and invariant throughout. Postdating the Pb-Zn peak, there is a subsequent elevation in Ba in many of the cores studied, at a sediment depth of between 10 and 20 cm. Maximum concentrations of Ba reach 3360 ppm; Pb, 2220 ppm; Zn, 887 ppm and Cu, 258 ppm. Detrital minerals present include: barite, rutile, ilmenite, zircon, monazite, pyrite, cassiterite, sphalerite, galena and chalcopyrite. Framboidal pyrite is the only diagenetic mineral observed. The geochemical results are consistent with the historical mining records in the catchment, with barite mining postdating Pb-Zn mining. Both episodes of mining have released particulate mine waste, which has accumulated within the estuarine sediments.
Type: Article
Keywords: environmental impactminingestuariesSW England
ISSN: 0566-3954


Please note: Before reusing this item please check the rights under which it has been made available. Some items are restricted to non-commercial use. Please cite the published version where applicable.

Files in this item

Files Size Format View Description
Simons et al 20 ... t mining Teign Estuary.pdf 4.775Mb PDF View/Open Published version

This item appears in the following Collection(s)

Browse

My Account

Local Links