Determining seasonality of mussel collection from an early historic Inuit site, Labrador, Canada: Comparing thin-sections with high-resolution stable oxygen isotope analysis

2018 ◽  
Vol 21 ◽  
pp. 1215-1224 ◽  
Author(s):  
Meghan Burchell ◽  
Marianne P. Stopp ◽  
Aubrey Cannon ◽  
Nadine Hallmann ◽  
Bernd R. Schöne
Keyword(s):  
High Resolution ◽  
Oxygen Isotope ◽  
Isotope Analysis ◽  
Stable Oxygen Isotope ◽  
Thin Sections ◽  
Stable Oxygen ◽  
Early Historic

scholarly journals New Ag 3 PO 4 comparison material for stable oxygen isotope analysis

2021 ◽  
Author(s):  
Andrea Watzinger ◽  
Katharina Schott ◽  
Rebecca Hood‐Nowotny ◽  
Federica Tamburini ◽  
Laura Arppe ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Analysis ◽  
Stable Oxygen Isotope ◽  
Stable Oxygen

scholarly journals ShellChron 0.2.8: A new tool for constructing chronologies in accretionary carbonate archives from stable oxygen isotope profiles

2021 ◽  
Author(s):  
Niels J. de Winter
Keyword(s):  
High Resolution ◽  
Oxygen Isotope ◽  
Computation Time ◽  
Stable Oxygen Isotope ◽  
Model Code ◽  
Proxy Records ◽  
Age Model ◽  
Stable Oxygen ◽  
High Flexibility ◽  
Window Approach

Abstract. This work presents ShellChron, a new model for generating accurate age-depth models for high-resolution paleoclimate archives, such as corals, mollusk shells and speleothems. Reliable sub-annual age models form the backbone of high-resolution paleoclimate studies. In absence of independent sub-annual growth markers in many of these archives, the most reliable method for determining the age of samples is through age modelling based on stable oxygen isotope or other seasonally controlled proxy records. ShellChron expands on previous solutions to the age model problem by modelling seasonal variability in the proxy record using a combination of growth rate and temperature sinusoids in sliding window approach. This new approach creates smoother, more precise age-depth relationships for multi-annual proxy records with the added benefit of allowing assessment of the uncertainty on the modelled age. The modular script of ShellChron allows the model to be tailored to specific archives, without being limited to δ18Oc proxy records or carbonate archives, with high flexibility in assigning the relationship between the input proxy and the seasonal cycle. The performance of ShellChron in terms of accuracy and computation time is tested on a set of virtual seasonality records and real coral, bivalve and speleothem archives. The result shows that several key improvements in comparison to previous age model routines enhance the accuracy of ShellChron on multi-annual records while limiting its processing time. The current full working version of ShellChron enables the user to model the age of a 10-year long high-resolution (16 samples/yr) carbonate records with monthly accuracy within one hour of computation time on a modern personal computer. The model is freely accessible on the CRAN database and GitHub. Members of the community are invited to contribute by adapting the model code to suit their research topics.

Isotopes, Migration, and Sex

2019 ◽  
pp. 83-106
Author(s):  
Amanda T. Groff ◽  
Tosha L. Dupras
Keyword(s):  
Oxygen Isotope ◽  
Isotope Analysis ◽  
Cultural Identities ◽  
Nile Valley ◽  
Stable Oxygen Isotope ◽  
Textual Evidence ◽  
Work Related ◽  
Economic Practices ◽  
Stable Oxygen ◽  
Definition Of

The Egyptian oases were dynamic borderlands where culture, economic practices, and politics diverged from the Nile Valley. The cultural identities of the individuals inhabiting these frontiers during the Romano-Christian era (50–450CE) are predominantly lost to history, save for scant textual sources that describe socioeconomic activities. In this chapter, we explore these identities further by utilizing stable oxygen isotope analysis in conjunction with textual sources to discuss the mobility of adults from the Kellis 2 Cemetery, Dakhleh Oasis, Egypt. Results from this analysis indicate females came from isotopically similar environments and were stationary, while males were migrating more frequently for work-related activities. These data complement the limited textual evidence allowing for more detailed reconstruction of economics, kinship, and residence patterns during the Romano-Christian era, and lend to a definition of Egyptian frontier identity.

Inter-laboratory calibration of new silver orthophosphate comparison materials for the stable oxygen isotope analysis of phosphates

2011 ◽  
Vol 25 (5) ◽  
pp. 579-584 ◽  
Author(s):  
Stanislaw Halas ◽  
Grzegorz Skrzypek ◽  
Wolfram Meier-Augenstein ◽  
Andrzej Pelc ◽  
Helen F. Kemp
Keyword(s):  
Oxygen Isotope ◽  
Isotope Analysis ◽  
Stable Oxygen Isotope ◽  
Laboratory Calibration ◽  
Stable Oxygen

Age validation of Pacific cod (Gadus macrocephalus) using high-resolution stable oxygen isotope (δ 18O) chronologies in otoliths

2017 ◽  
Vol 185 ◽  
pp. 43-53 ◽  
Author(s):  
Craig R. Kastelle ◽  
Thomas E. Helser ◽  
Jennifer L. McKay ◽  
Chris G. Johnston ◽  
Delsa M. Anderl ◽  
...  
Keyword(s):  
High Resolution ◽  
Oxygen Isotope ◽  
Age Validation ◽  
Pacific Cod ◽  
Stable Oxygen Isotope ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus ◽  
Stable Oxygen
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