scholarly journals Paleovegetation Inferred from the Carbon Isotope Composition of Long-Chain N-Alkanes in Lacustrine Sediments from the Song-Nen Plain, Northeast China

2020 ◽  
Author(s):  
Zhifu Wei ◽  
Yongli Wang ◽  
Gen Wang
Keyword(s):  
Carbon Isotope ◽  
Northeast China ◽  
Isotope Composition ◽  
Lacustrine Sediments ◽  
Carbon Isotope Composition ◽  
Long Chain

scholarly journals Carbon Isotope Composition of Nighttime Leaf-Respired CO2 in the Agricultural-Pastoral Zone of the Songnen Plain, Northeast China

PLoS ONE ◽  
2015 ◽  
Vol 10 (9) ◽  
pp. e0137575 ◽  
Author(s):  
Haiying Cui ◽  
Yunbo Wang ◽  
Qi Jiang ◽  
Shiping Chen ◽  
Jian-Ying Ma ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Northeast China ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Songnen Plain

Detrital carbonate influences on bulk oxygen and carbon isotope composition of lacustrine sediments from the Mediterranean

2010 ◽  
Vol 71 (3-4) ◽  
pp. 175-182 ◽  
Author(s):  
Melanie J. Leng ◽  
Matthew D. Jones ◽  
Michael R. Frogley ◽  
Warren J. Eastwood ◽  
Chris P. Kendrick ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Lacustrine Sediments ◽  
Carbon Isotope Composition ◽  
Oxygen And Carbon Isotope ◽  
Bulk Oxygen ◽  
The Mediterranean ◽  
Detrital Carbonate

scholarly journals Coeval primary and diagenetic carbonates in lacustrine sediments challenge palaeoclimate interpretations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeremy McCormack ◽  
Ola Kwiecien
Keyword(s):  
Isotope Composition ◽  
Lacustrine Sediments ◽  
Carbon Isotope Composition ◽  
Large Variability ◽  
Oxygen And Carbon Isotope ◽  
Temperature And Precipitation ◽  
Lacustrine Carbonates ◽  
Geochemical Analyses ◽  
Mixed Nature ◽  
Water Carbonate

AbstractLakes are sensitive to climate change and their sediments play a pivotal role as environmental recorders. The oxygen and carbon isotope composition (δ18O and δ13C) of carbonates from alkaline lakes is featured in numerous studies attempting a quantitative reconstruction of rainfall, temperature and precipitation-evaporation changes. An often-overlooked challenge consists in the mineralogically mixed nature of carbonates themselves. We document a large variability of carbonate components and their respective distinct δ18O and δ13C values from sediments of Lake Van (Turkey) covering the last 150 kyr. The carbonate inventory consists of primary (1) inorganic calcite and aragonite precipitating in the surface-water, (2) biogenic calcite ostracod valves; and post-depositional phases: (3) dolomite forming in the sediment, and previously overlooked, (4) aragonite encrustations formed rapidly around decaying organic matter. We find a systematic relation between the lithology and the dominant deep-water carbonate phase formed recurrently under specific hydrological conditions. The presence of the different carbonates is never mutually exclusive, and the isotopic composition of each phase forms a distinctive cluster characteristic for the depth and timing of their formation. Our findings stretch the envelope of mechanisms forming lacustrine carbonates and highlight the urge to identify and separate carbonate components prior to geochemical analyses.

The influence of hydrodynamics on the carbon isotope composition of inorganically precipitated calcite

2021 ◽  
Vol 565 ◽  
pp. 116932
Author(s):  
Hao Yan ◽  
Wolfgang Dreybrodt ◽  
Huiming Bao ◽  
Yongbo Peng ◽  
Yu Wei ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Carbon Isotope Composition
Sign in / Sign up

Export Citation Format

Share Document