scholarly journals CO<sub>2</sub>/<sup>3</sup>He ratios reveal the presence of mantle gas in the CO<sub>2</sub>-rich groundwaters of the Ardenne massif (Spa, Belgium)

2022 ◽  
Author(s):  
Agathe Defourny ◽  
Pierre-Henri Blard ◽  
Laurent Zimmermann ◽  
Patrick Jobé ◽  
Arnaud Collignon ◽  
...  
Keyword(s):  
Carbon Isotopic Composition ◽  
Volcanic Field ◽  
Major Elements ◽  
Thrust Faults ◽  
Rhenish Massif ◽  
Transport Pathway ◽  
Carbon Isotopic ◽  
Sampling Campaign ◽  
High Level ◽  
Exact Origin

Abstract. Natural CO2-rich groundwaters of eastern Belgium have been known for centuries although the exact origin of the gas they contained was still unclear. This paper presents the results of a sampling campaign in the area (Spa, Stoumont, Malmedy) where 30 samples of both carbogazeous and non-carbogazeous groundwaters have been analyzed for major elements, CO2 content and carbon isotopic composition. Among them, 13 samples were analyzed for 3He / 4He and 4He / 20Ne ratios. The combination of δ13C and 3He / CO2 ratios have shown with a high level of confidence that the CO2 in groundwater from springs and boreholes has a mantellic origin, and can very likely be attributed to the degassing of the neighboring and still buoyant Eifel mantle plume, located at a distance of 100 km eastwards. The identity and nature of the deep-rooted fractures that act as CO2 transport pathway to the surface are still to be clarified, but several major thrust faults exist in the Rhenish Massif and could connect the Eifel volcanic field with the studied area.

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

scholarly journals Stable Carbon Isotopic Composition in Annual Rings of a Pine Tree (Pinus Densiflora) from Yeongwol, Korea: Possible Application to Climate Study

Radiocarbon ◽  
2017 ◽  
Vol 59 (2) ◽  
pp. 373-381
Author(s):  
Chi-Hwan Kim ◽  
Jang Hoon Lee ◽  
Jin Kang ◽  
Sujin Song ◽  
Myung-ho Yun ◽  
...  
Keyword(s):  
Tree Rings ◽  
Pinus Densiflora ◽  
Stable Carbon Isotope ◽  
Carbon Isotopic Composition ◽  
Precipitation Data ◽  
Stable Carbon ◽  
Climate Data ◽  
Carbon Isotopic ◽  
Pine Tree ◽  
Paleoclimate Proxy

AbstractStable carbon isotope ratios were measured on the alpha-cellulose in tree rings of a pine tree (Pinus densiflora) from Yeongwol, Korea. We developed an annual-resolution δ13C series (1835–1905) by correcting the measured data for changes in δ13C of air to minimize non-climatic influences. To investigate the climatic signal in the δ13C series, we performed correlation analysis between δ13C and the Cheugugi climate data. The Cheugugi precipitation data were first recorded by King Sejong (1397–1450) of the Joseon Dynasty. However, the longest set of precipitation data available is the one collected in Seoul (1776–1907). Although many studies support the reliability of the Cheugugi data, no previous studies have investigated the potential of the δ13C signal in tree rings as paleoclimate proxy using the Cheugugi data. Recent precipitation trends in Yeongwol are quite similar to that of Seoul, and we found significant correlations between the Cheugugi data and the δ13C series. We suggest further studies to replicate these results and confirm whether comparing δ13C variations in tree rings and Cheugugi data is a useful method of investigating the potential of the δ13C signal as a paleoclimate proxy in or near the Korean peninsula.

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

Carbon-Isotope, Diatom, and Pollen Evidence for Late Holocene Salinity Change in a Brackish Marsh in the San Francisco Estuary

2001 ◽  
Vol 55 (1) ◽  
pp. 66-76 ◽  
Author(s):  
Roger Byrne ◽  
B. Lynn Ingram ◽  
Scott Starratt ◽  
Frances Malamud-Roam ◽  
Joshua N. Collins ◽  
...  
Keyword(s):  
San Francisco ◽  
High Salinity ◽  
Carbon Isotopic Composition ◽  
Brackish Marsh ◽  
San Francisco Estuary ◽  
Freshwater Inflow ◽  
Water Diversion ◽  
Freshwater Flow ◽  
Low Salinity ◽  
Carbon Isotopic

AbstractAnalysis of diatoms, pollen, and the carbon-isotopic composition of a sediment core from a brackish marsh in the northern part of the San Francisco Estuary has provided a paleosalinity record that covers the past 3000 yr. Changes in marsh composition and diatom frequencies are assumed to represent variations in freshwater inflow to the estuary. Three periods of relatively high salinity (low freshwater inflow) are indicated, 3000 to 2500 cal yr B.P., 1700 to 730 cal yr B.P., and ca. A.D. 1930 to the present. The most recent period of high salinity is primarily due to upstream storage and water diversion within the Sacramento–San Joaquin watershed, although drought may also have been a factor. The two earlier high-salinity periods are likely the result of reduced precipitation. Low salinity (high freshwater flow) is indicated for the period 750 cal yr B.P. to A.D. 1930.

Sign in / Sign up

Export Citation Format

Share Document