On Using Carbon and Oxygen Isotope Data from Glendonites as Paleoenvironmental Proxies: A Case Study from the Permian System of Eastern Australia

2008 ◽  
Vol 78 (11) ◽  
pp. 713-723 ◽  
Author(s):  
T. D. Frank ◽  
S. G. Thomas ◽  
C. R. Fielding
Keyword(s):  
Oxygen Isotope ◽  
Isotope Data ◽  
Permian System ◽  
Oxygen Isotope Data ◽  
Carbon And Oxygen Isotope ◽  
Eastern Australia

Trace-element content and partitioning in calcite, dolomite and apatite in carbonatite, Phalaborwa, South Africa

2003 ◽  
Vol 67 (5) ◽  
pp. 921-930 ◽  
Author(s):  
J. B. Dawson ◽  
R. W. Hinton
Keyword(s):  
South Africa ◽  
Trace Element ◽  
Oxygen Isotope ◽  
Trace Element Content ◽  
The Other ◽  
Element Content ◽  
Isotope Data ◽  
Oxygen Isotope Data ◽  
Carbon And Oxygen Isotope

AbstractA carbonatite sample from Phalaborwa, South Africa, consists of apatite, magnetite and a calcitedolomite ‘perthite’ which is interpreted as being due to exsolution of dolomite from a high-Mg calcite precursor. Carbon and oxygen isotope data indicate that the carbonates are equilibrated. In situ ionmicroprobe analyses for Fe, Mn, Na, Si, Y, the REEs, Pb, Th and U give the following average concentrations (in ppm) in the sequence apatite, calcite, dolomite: Fe 98, 1680, 8190; Mn 61, 510, 615; Na 1171, 627, 125; Si 368; 1.6, 0.2; Sr 4447, 5418, 2393; Ba 37, 2189, 75; La 1245, 300, 67; Y 121, 50, 5.8; Pb 16, 5.4, 1.4; Th 20, 0.02, 0; U 2.4, 0, 0.01. The concentrations are reasonably uniform in both apatite and dolomite, but in calcite are more variable. Na, Si, Y, the REEs, Pb, Th and U partition into apatite relative to both carbonates (and, hence, the precursor carbonate); KD ap/cc for REE decreases from ∽4 for La to ∽2 for Tm. There is almost equal partitioning of Sr between apatite and calcite. During separation of dolomite from calcite, Sr and Ba partition strongly into calcite and all the other analysed elements, except Fe and Mn, also preferentially enter calcite. The REEs prefer calcite relative to dolomite, and the KD dol/cc is reasonably constant, only varying from 0.23 to 0.17. Sr, Ba and Pb in the carbonates, and their partitioning between the calcite and dolomite, differ from other carbonatite carbonates reported in the literature.

Tracing the emerald origin by oxygen isotope data: the case of Sandawana, Zimbabwe

2004 ◽  
Vol 336 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Johannes C.(Hanco) Zwaan ◽  
Alain Cheilletz ◽  
Bruce E. Taylor
Keyword(s):  
Oxygen Isotope ◽  
Isotope Data ◽  
Oxygen Isotope Data

scholarly journals Oxygen isotope composition of zircons from the Talnakh economic intrusion of the Noril’sk province: first data

2019 ◽  
Vol 489 (2) ◽  
pp. 170-173
Author(s):  
I. Yu. Badanina ◽  
E. A. Belousova ◽  
K. N. Malitch ◽  
S. F. Sluzhenikin
Keyword(s):  
Oxygen Isotope ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
Primary Magma ◽  
Crustal Component ◽  
Layered Series ◽  
Isotope Data ◽  
Oxygen Isotope Data ◽  
First Results ◽  
Isotope Analyses

This study presents the first results of oxygen isotope analyses (18O) collected on zircons from the Talnakh economic intrusion within the Norilsk province. Zircons from gabbro-diorite, gabbroic rocks of the layered series and plagioclase-bearing wehrlite have similar mantle-like mean 18O values (5,39 0,49; 5,64 0,48 and of 5,28 0,34, respectively), which differ from 18O in zircons from sulfide-bearing melanocratic troctolite with a taxitic texture in the lower part of the intrusion (mean 18O = 6,50 0,98). These new oxygen isotope data support (i) the mantle-derived origin of the primary magma(s), parental to the Talnakh intrusion, and (ii) possible involvement of a crustal component during the formation of sulfide-bearing taxitic-textured rocks.

Stable carbon and oxygen isotope compositions of invertebrate carbonate shells and the reconstruction of paleotemperatures and paleosalinities—A case study of the early Pleistocene of Rhodes, Greece

2012 ◽  
Vol 350-352 ◽  
pp. 39-48 ◽  
Author(s):  
Christophe Lécuyer ◽  
Valérie Daux ◽  
Pierre Moissette ◽  
Jean-Jacques Cornée ◽  
Frédéric Quillévéré ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Early Pleistocene ◽  
Stable Carbon ◽  
Carbon And Oxygen Isotope

scholarly journals New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars

2016 ◽  
Vol 51 (5) ◽  
pp. 981-995 ◽  
Author(s):  
Arshad Ali ◽  
Iffat Jabeen ◽  
David Gregory ◽  
Robert Verish ◽  
Neil R. Banerjee
Keyword(s):  
Oxygen Isotope ◽  
Isotope Data ◽  
Oxygen Isotope Data
Sign in / Sign up

Export Citation Format

Share Document