搜索结果: 1-13 共查到“理学 d13C”相关记录13条 . 查询时间(0.054 秒)
Micron-scale d13C determination by NanoSIMS in a Juina diamond with a carbonate inclusion
sub-lithospheric diamonds Juina carbonate lower mantle peridotite eclogite
2017/4/10
Juina diamonds present a wide spectrum of mineral inclusions, covering both peridotitic and eclogitic composition.
Among the most rare inclusions, carbonates are interpreted as an evidence of deep re...
Constraints on the Origin of the Balıkesir Thermal Waters (Turkey) from Stable Isotope (d18O, dD, d13C, d34S) and Major-Trace Element Compositions
water-rock interaction stable isotope compositions major-trace element geochemistry Balı kesir thermal waters Turkey
2009/7/7
The Balıkesir thermal waters in northwestern Turkey have discharge temperatures in the range of 31.8-98.5 ºC, near neutral pH values of 6.40 to 8.40 and TDS contents between 327 and 2578 mg/...
Natural isotopic composition of carbon (d13C) correlates with colony size in the planktonic cyanobacterium Gloeotrichia echinulata
Natural isotopic composition of carbon d13C correlates with colony size planktonic cyanobacterium Gloeotrichia echinulata
2014/4/18
To assess variability in carbon isotope signatures (δ13C) between and within populations under natural conditions, with a particular emphasis on colony size, we repeatedly collected planktonic colonie...
Decadal diagenetic effects on d13C and d15N studied in varved lake sediment
Decadal diagenetic effects on d13C d15N studied varved lake sediment
2014/4/18
To assess the long-term (27 yr) effects of sediment aging on stable carbon and nitrogen isotope values (δ13C and δ15N), we used a collection of eight freeze cores of annually laminated (varved) lake s...
Tracing terrestrial organic matter by d34S and d13C signatures in a subarctic estuary
Tracing terrestrial organic matter d34S and d13C signatures a subarctic estuary
2014/4/21
A key issue to understanding the transformations of terrestrial organic carbon in the ocean is to disentangle the latter from marine-produced organic matter. We applied a multiple stable isotope appro...
Patterns in the d13C and d15N signature of Ulva pertusa: Interaction between physical gradients and nutrient source pools
Patterns in the d13C and d15N signature of Ulva pertusa Interaction between physical gradients nutrient source pools
2014/4/23
Field surveys and laboratory experiments were used to investigate the influence of the physical environment on variability in δ13C and δ15N signatures of Ulva pertusa, an abundant macroalgae inhabitin...
Temporal and spatial variation in the d15N and d13C of coral tissue and zooxanthellae in Montastraea faveolata collected from the Florida reef tract
Temporal and spatial variation d15N and d13C coral tissue and zooxanthellae Montastraea faveolata collected Florida reef tract
2014/5/9
Tissues were collected from Montastraea faveolata at five locations on the Florida Reef tract representing both nearshore and offshore environments. The tissue and zooxanthellae were removed from the ...
Factors controlling d13C values of sedimentary carbon in hypertrophic Baldeggersee, Switzerland, and implications for interpreting isotope excursions in lake sedimentary records
Factors controlling d13C values sedimentary carbon in hypertrophic Baldeggersee Switzerland interpreting isotope excursions lake sedimentary records
2014/5/9
We use stable carbon isotope values (δ13C) in sedimented organic matter and carbonate as proxy indicators of productivity changes in a highly eutrophic to hypertrophic lake. Stable isotope data from a...
Controls of d13C-DIC in lakes: Geochemistry, lake metabolism, and morphometry
d13C-DIC in lakes Geochemistry lake metabolism morphometry
2014/5/19
We investigated δ13 carbon (C)-dissolved inorganic carbon (DIC) values in 72 lakes from diverse regions using literature data as well as new measurements for 32 lakes. δ13C-DIC varied broadly among la...
Interspecific and intraspecific variation of d13C and d15N in deposit- and suspension-feeding bivalves (Macoma balthica and Cerastoderma edule): Evidence of ontogenetic changes in feeding mode of Macoma balthica
Interspecific and intraspecific variation d13C and d15N deposit- and suspension-feeding bivalves ontogenetic changes feeding mode Macoma balthica
2014/5/14
Deposit and suspension feeders can switch feeding behavior and show variations in feeding mode as individuals pass through life-cycle stages. Stable carbon and nitrogen isotopes were used to trace cha...
Seasonal variation of the d13C and d15N of particulate and dissolved carbon and nitrogen in Lake Lugano: Constraints on biogeochemical cycling in a eutrophic lake
Seasonal variation d13C and d15N particulate and dissolved carbon and nitrogen Lake Lugano biogeochemical cycling a eutrophic lake
2014/5/14
We determined the δ13C and δ15N of water-column particulate organic matter (POM), dissolved inorganic carbon, and nitrate, together with water chemistry and phytoplankton biomass and species compositi...
d13C of fluvial mollusk shells (Rhone River): A proxy for dissolved inorganic carbon?
d13C fluvial mollusk shells dissolved inorganic carbon
2014/5/22
The relationship between the δ13C of dissolved inorganic carbon (DIC) and modern mollusk aragonite from rivers was calibrated for the purpose of reconstructing DIC paleochemistry from the shell record...
Carbon sources for demersal fish in the western Seto Inland Sea, Japan, examined by d13C and d15N analyses
Carbon sources demersal fish the western Seto Inland Sea Japan examined by d13C d15N analyses
2014/5/27
The relative importance of benthic and pelagic primary production for demersal fish and some invertebrates in the western Seto Inland Sea of Japan was examined using carbon and nitrogen stable isotope...