Stable isotope constraints on the fluid source of hydrothermal breccia pipes in the Tankwa Karoo depocentre, South Africa: Breakdown of authigenic minerals during sill intrusion

2018 ◽  
Vol 31 (1) ◽  
pp. 114-135 ◽  
Author(s):  
Chris Harris ◽  
Nonkululeko Buthelezi ◽  
Beth Kahle ◽  
Richard Kahle ◽  
Kathlego Ramahala ◽  
...  
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Authigenic Minerals ◽  
Fluid Source ◽  
Sill Intrusion

Stable isotope and noble gas constraints on the source and residence time of spring water from the Table Mountain Group Aquifer, Paarl, South Africa and implications for large scale abstraction

2017 ◽  
Vol 551 ◽  
pp. 100-115 ◽  
Author(s):  
J.A. Miller ◽  
A.J. Dunford ◽  
K.A. Swana ◽  
L. Palcsu ◽  
M. Butler ◽  
...  
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Residence Time ◽  
Large Scale ◽  
Noble Gas ◽  
Spring Water ◽  
Table Mountain

Stable isotope profile across the orthoamphibole isograd in the Southern Marginal Zone of the Limpopo Belt, South Africa

1992 ◽  
Vol 55 (1-4) ◽  
pp. 365-397 ◽  
Author(s):  
Torsten W. Vennemann ◽  
H. Stuart Smith
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Marginal Zone ◽  
Isotope Profile ◽  
Southern Marginal Zone ◽  
Limpopo Belt

Geochemical and stable isotope patterns in altered volcaniclastic and intrusive rocks of the Kruidfontein carbonatite complex, South Africa

1997 ◽  
Vol 25 (1) ◽  
pp. 77-101 ◽  
Author(s):  
L.W. Schürmann ◽  
U.E. Horstmann ◽  
H.C.C. Cloete
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Carbonatite Complex ◽  
Intrusive Rocks

Stable isotope and fluid inclusion data of the Rooiberg tin field deposits, South Africa

2009 ◽  
Vol 101 (1) ◽  
pp. 33
Author(s):  
Kevin Faure ◽  
Agnes Reyes
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Fluid Inclusion ◽  
Fluid Inclusion Data

scholarly journals Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

2019 ◽  
Author(s):  
Beric M. Gilbert ◽  
Milen Nachev ◽  
Maik A. Jochmann ◽  
Torsten C. Schmidt ◽  
Daniel Köster ◽  
...  
Keyword(s):  
South Africa ◽  
Stable Isotopes ◽  
Stable Isotope ◽  
Feeding Strategy ◽  
Isotope Analysis ◽  
Isotope Enrichment ◽  
Host Fish ◽  
Vaal River ◽  
Spatial Differences ◽  
Stable Isotope Enrichment

Abstract BackgroundStable isotope analysis offers a unique tool for comparing trophic interactions and food web architecture in ecosystems. This approach is based on analysis of the stable isotope ratios of carbon (13 C/ 12 C) and nitrogen (15 N/ 14 N) in organisms. Studies comparing stable isotope enrichment in hosts and parasites have shown that parasites are variably enriched in stable isotopes relative to the host.MethodsSharptooth catfish (Clarias gariepinus) were collected from six sites along the Vaal River, South Africa and were assessed for ectoparasites and endoparasites. Lamproglena clariae (Copepoda), Tetracampus ciliotheca and Proteocephalus glanduligerus (Cestoda), and larval Contracaecum sp. (Nematoda) were collected from the gills, intestine and mesenteries, respectively. Signatures of δ 13 C and δ 15 N were analysed in host muscle tissue and parasites using bulk stable isotope analysis.ResultsStable isotope enrichment was variable between parasites and the host fish, with L. clariae and the host sharing similar δ 15 N signatures and the endoparasites being depleted in both δ 13 C and δ 15 N relative to the host. Spatial differences in enrichment of stable isotopes were also identified. Fish and parasites collected from below the Vaal River Barrage were more enriched in the 15 N isotope than hosts and parasites collected from other sites. The opposite was identified for 13 C isotope fractionation.ConclusionDifferences in stable isotope enrichment in parasites infecting C. gariepinus could be related to the feeding strategy of each parasite species collected. Enrichment of δ 15 N in L. clariae would relate to the micropredatory nature of this parasite, which feeds on whole blood of the host fish. Depleted isotope levels in endoparasites could relate to their absorptive feeding strategy on metabolic by-products of the host. Spatial differences in both host and parasite tissues identified likely resulted from differences in the diet of the host and related with availability of prey items for the host fish.

Pb–Pb age, stable isotope and chemical composition of Archaean magnesite, Barberton Greenstone Belt, South Africa

2010 ◽  
Vol 167 (5) ◽  
pp. 943-952 ◽  
Author(s):  
T. Toulkeridis ◽  
B. Peucker-Ehrenbrink ◽  
N. Clauer ◽  
A. Kröner ◽  
M. Schidlowski ◽  
...  
Keyword(s):  
South Africa ◽  
Chemical Composition ◽  
Stable Isotope ◽  
Greenstone Belt ◽  
Barberton Greenstone Belt
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