Modeled and Measured Carbon Isotopic Composition and Petrographically Estimated Binder-Aggregate Ratio—Recipe for Binding Material Dating?

Radiocarbon ◽  
2019 ◽  
Vol 61 (03) ◽  
pp. 799-815 ◽  
Author(s):  
Danuta Michalska ◽  
Jacek Pawlyta
Keyword(s):  
Isotopic Composition ◽  
Environmental Conditions ◽  
Age Estimation ◽  
Carbonate Rocks ◽  
Carbon Isotopic Composition ◽  
Isotopic Fractionation ◽  
Carbon Isotopic ◽  
Binding Material ◽  
Age Correction

ABSTRACTThis paper presents the results of radiocarbon (14C) dating of bulk mortars and reports an attempt of implementation of the knowledge about the isotopic fractionation, based on δ13C measurements, to make the age correction for mortars, together with verification of such correction based on the percentage estimation of carbonate components, namely binder and aggregate. To evaluate the variability of isotopic fractionation during CO2 absorption by mortar, dependent on the climatic and environmental conditions, and the type of mortar, the δ13C measurements have been performed for the mortars from Sussita (Golan Heights). Such measurements were also made for fragments of natural carbonate rocks and for mortars produced in the laboratory from the same substrate. We propose the recipe for mortars age estimation.

scholarly journals Evaluating Dissolved Inorganic Carbon Cycling in a Forested Lake Watershed Using Carbon Isotopes

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 636-645 ◽  
Author(s):  
Ramon Aravena ◽  
S. L. Schiff ◽  
S. E. Trumbore ◽  
P. J. Dillon ◽  
Richard Elgood
Keyword(s):  
Isotopic Composition ◽  
Carbon Isotopes ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon Isotopic Composition ◽  
Isotopic Fractionation ◽  
Early Spring ◽  
Late Winter ◽  
Isotope Pattern ◽  
Carbon Isotopic

Dissolved inorganic carbon (DIC) is the main acid buffer in forested lake watersheds in Canada. We used carbon isotopes (13C, 14C) to evaluate the production and cycling of DIC in an acid-sensitive lake watershed of the Precambrian Shield. Soil CO2, groundwater and stream DIC were characterized chemically and isotopically. Soil CO2 concentration profiles reflect both changes in production and in losses due to diffusion. δ13C soil CO2 profiles (δ13C values of −23‰ in summer, slightly enriched during the fall and −25%‰ during the winter) are a reflection of the isotopic composition of the sources and changes in isotopic fractionation due to diffusion. Carbon isotopic composition (13C, 14C) of the groundwater and stream DIC clearly indicate that weathering of silicates by soil CO2 is the main source of DIC in these watersheds. 14C data show that, in addition to recent groundwater, an older groundwater component with depleted 14C activity is also present in the bedrock. The carbon isotope pattern in the groundwater also implies that, besides the main springtime recharge events, contributions to the groundwater may also occur during late winter/early spring.

New equation to decipher the relationship between carbon isotopic composition of methane and maturity of gas source rocks

2021 ◽  
Vol 64 (3) ◽  
pp. 470-493 ◽  
Author(s):  
Jianping Chen ◽  
Xulong Wang ◽  
Jianfa Chen ◽  
Yunyan Ni ◽  
Baoli Xiang ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Carbon Isotopic Composition ◽  
Source Rocks ◽  
Carbon Isotopic ◽  
Gas Source ◽  
New Equation ◽  
The Relationship

The carbon isotopic composition of individual petroleum lipids

1984 ◽  
Vol 6 ◽  
pp. 665-670 ◽  
Author(s):  
I. Gilmour ◽  
P.K. Swart ◽  
C.T. Pillinger
Keyword(s):  
Isotopic Composition ◽  
Carbon Isotopic Composition ◽  
Carbon Isotopic

Oxygen and carbon isotopic composition of fish otoliths

1992 ◽  
Vol 113 (4) ◽  
pp. 537-542 ◽  
Author(s):  
P. Iacumin ◽  
G. Bianucci ◽  
A. Longinelli
Keyword(s):  
Isotopic Composition ◽  
Carbon Isotopic Composition ◽  
Carbon Isotopic ◽  
Fish Otoliths
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