OOIR: Observatory of International Research

Papers

(The TQCC of Organic Geochemistry is 6. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-04-01 to 2024-04-01.)

Article	Citations
Geochemistry of shale gases from around the world: Composition, origins, isotope reversals and rollovers, and implications for the exploration of shale plays	73
Molecular heterogeneity in pyrogenic dissolved organic matter from a thermal series of oak and grass chars	32
Polycyclic aromatic hydrocarbons in Middle Jurassic sediments of the Polish Basin provide evidence for high-temperature palaeo-wildfires	30
Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes	29
Development of an in situ branched GDGT calibration in Lake 578, southern Greenland	25
Controlled lacustrine microcosms show a brGDGT response to environmental perturbations	22
The fate of organic carbon burial in the river-dominated East China Sea: Evidence from sediment geochemical records of the last 70 years	21
Stable isotopes of organic carbon, palynology, and petrography of a thick low-rank Miocene coal within the Mile Basin, Yunnan Province, China: implications for palaeoclimate and sedimentary conditions	20
Insights into catalytic effects of clay minerals on hydrocarbon composition of generated liquid products during oil cracking from laboratory pyrolysis experiments	20
Assessment of the molecular composition of humic acid as an indicator of soil carbon levels by ultra-high-resolution mass spectrometric analysis	20
Geochemical anomalies in the Lower Silurian shale gas from the Sichuan Basin, China: Insights from a Rayleigh-type fractionation model	20
New approaches to distinguish shale-sourced and coal-sourced gases in petroleum systems	19
Glycerol dialkyl glycerol tetraethers in surface sediments from three Pacific trenches: Distribution, source and environmental implications	18
Evaluating different methods for calculating the Carbon Preference Index (CPI): Implications for palaeoecological and archaeological research	18
Geochemical implications from direct Rock-Eval pyrolysis of petroleum	18
Global temperature calibration of the Long chain Diol Index in marine surface sediments	18
Cover loss in a seagrass Posidonia oceanica meadow accelerates soil organic matter turnover and alters soil prokaryotic communities	17
A unique bacteriohopanetetrol stereoisomer of marine anammox	17
Stable carbon isotope evidence for the origin of C28 steranes in lacustrine source rocks from the Qikou Sag, Bohai Bay Basin, Eastern China	17
An automated solid phase extraction procedure for lipid biomarker purification and stable isotope analysis	16
Molecular mechanisms of solid bitumen and vitrinite reflectance suppression explored using hydrous pyrolysis of artificial source rock	16
Identifying plant wax inputs in lake sediments using machine learning	16
Conifers are a major source of sedimentary leaf wax n-alkanes when dominant in the landscape: Case studies from the Paleogene	16
Simultaneous extraction and chromatographic separation of n-alkanes and alkenones from glycerol dialkyl glycerol tetraethers via selective Accelerated Solvent Extraction	15
Practical considerations for amino acid isotope analysis	15

Organic biogeochemistry in the oxygen-deficient ocean: A review	15
Carbon isotope systematics of leaf wax n-alkanes in a temperate lacustrine depositional environment	15
Temperature and water depth effects on brGDGT distributions in sub-alpine lakes of mid-latitude North America	15
Possible explanations for the predominance of tricyclic terpanes over pentacyclic terpanes in oils and rock extracts	14
C41 methyl and C42 ethyl alkenones are biomarkers for Group II Isochrysidales	14
Composition and lability of photochemically released dissolved organic matter from resuspended estuarine sediments	14
Sedimentary core brGDGTs in the East China Sea are mainly produced in situ as evidenced by their similar distributions with brGDGTs derived from intact polar lipids	14
Hydrogen isotope fractionation in modern plants along a boreal-tundra transect in Alaska	13
Superimposed secondary alteration of oil reservoirs. Part I: Influence of biodegradation on the gas generation behavior of crude oils	13
Position-specific carbon isotopic composition of thermogenic propane: Insights from pyrolysis experiments	13
Plant wax evidence for precipitation and vegetation change from a coastal sinkhole lake in the Bahamas spanning the last 3000 years	13
Comparison of molecular distributions and carbon and hydrogen isotope compositions of n-alkanes from aquatic plants in shallow freshwater lakes along the middle and lower reaches of the Yangtze River,	13
Influence of environmental parameters on the distribution of bacterial lipids in soils from the French Alps: Implications for paleo-reconstructions	13
Characterisation of heteroatomic compounds in free and bound bitumen from different source rocks by ESI FT-ICR MS	13
Soil pH and aridity influence distributions of branched tetraether lipids in grassland soils along an aridity transect	12
Geochemical characterization and artificial thermal maturation of kerogen density fractions from the Eocene Huadian oil shale, NE China	12
Molecular composition of dissolved organic matter in saline lakes of the Qing-Tibetan Plateau	12
Experimental and theoretical study on the formation of volatile sulfur compounds under gas reservoir conditions	12
Petrological and geochemical characteristics of xylites and associated lipids from the First Lusatian lignite seam (Konin Basin, Poland): Implications for floral sources, decomposition and environment	12
Determination of in situ hydrocarbon contents in shale oil plays. Part 1: Is routine Rock–Eval analysis reliable for quantifying the hydrocarbon contents of preserved shale cores?	12
Effects of temperature and pH on archaeal membrane lipid distributions in freshwater wetlands	12
Mechanistic insights into sulfur rich oil formation, relevant to geological carbon storage routes. A study using (+) APPI FTICR-MS analysis	11
Molecular and optical characterization reveals the preservation and sulfurization of chemically diverse porewater dissolved organic matter in oligohaline and brackish Chesapeake Bay sediments	11
Kinetics of propane cracking and position-specific isotope fractionation: Insights into the origins of natural gases	11
Dynamic changes in leaf wax n-alkanes and δ13C during leaf development in winter wheat under varied irrigation experiments	11
Soil chemistry, temperature and bacterial community composition drive brGDGT distributions along a subarctic elevation gradient	11
Elucidating the formation pathway of photo-generated asphaltenes from light Louisiana sweet crude oil after exposure to natural sunlight in the Gulf of Mexico	11
Precise maturity assessment over a broad dynamic range using polycyclic and heterocyclic aromatic compounds	11
Inferring the impact of earthworms on the stability of organo-mineral associations, by Rock-Eval thermal analysis and 13C NMR spectroscopy	11
In-situ provenance of brGDGTs in peat sediments: A case study from southern China and a comparison of global results	11
Catchment-wide variations and biogeochemical time lags in soil fatty acid carbon isotope composition for different land uses: Implications for sediment source classification	11
Controls on the age of plant waxes in marine sediments – A global synthesis	11
Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes gro	10
An application of exploratory factor analysis in the deconvolution of heavy oil biodegradation, charging and mixing history in southeastern Mexico	10
Fingerprint of plant life in the Atacama Desert – Insights from n-alkane analyses	10
Diverse origins of “soil marker” bacteriohopanepolyols in marine oxygen deficient zones	10
Assessment of oil potentials for humic coals on the basis of flash Py-GC, Rock-Eval and confined pyrolysis experiments	9
Bound hydrocarbons and structure of pyrobitumen rapidly formed by asphaltene cracking: Implications for oil–source correlation	9
Reappraisal of archaeal C20-C25 diether lipid (extended archaeol) origin and use as a biomarker of hypersalinity	9
Spatial and seasonal variations of organic carbon distributions in typical intertidal sediments of China	9
Microbial lipid signatures in Arctic deltaic sediments – Insights into methane cycling and climate variability	9
Targeted and untargeted lipidomic analysis of haptophyte cultures reveals novel and divergent nutrient-stress adaptations	9
Diamondoids in petroleum: Their potential as source and maturity indicators	9
Multi-proxy approach involving ultrahigh resolution mass spectrometry and self-organising maps to investigate the origin and quality of sedimentary organic matter across a subtropical reservoir	9
Oil-source and oil-oil correlations and the origin of the heavy oil and bitumen accumulations in Northern Alberta, Canada	9
Composition and lability of riverine dissolved organic matter: Insights from thermal slicing ramped pyrolysis GC–MS, amino acid, and stable isotope analyses	9
Substantial maturity influence on carbon and hydrogen isotopic composition of n-alkanes in sedimentary rocks	9
Elucidation of the macromolecular composition of fossil biopolymers using Py-GC×GC-TOFMS	9
Composition of resinites from the Eocene Geiseltal brown coal basin, Saxony-Anhalt, Germany and comparison to their possible botanical analogues	9
Sterol, fatty acid, and lignin biomarkers identify the response of organic matter accumulation in Englebright Lake, California (USA) to climate and human impacts	9

Source, composition, and distributional pattern of branched tetraethers in sediments of northern Chinese marginal seas	9
Integration of methyldibenzothiophene and pyrolysis techniques to determine thermal maturity in sulfur-rich Type II-S source rocks and oils	9
Spatiotemporal variations of organic matter sources in two mangrove-fringed estuaries in Hainan, China	9
The impact of precipitation on the distributions of branched tetraethers in alkaline soils	8
Fourier transform ion cyclotron resonance mass spectrometric analysis of NSO-compounds generated in hydrothermally altered sediments from the Escanaba Trough, northeastern Pacific Ocean	8
Plant wax and carbon isotope response to heat and drought in the conifer Juniperus monosperma	8
Methylation and demethylation of naphthalene homologs in highly thermal mature sediments	8
Early diagenetic pyrite cementation influences molecular composition of sedimentary organic matter in the Dongying Depression, China	8
GDGTs as indicators for organic-matter sources in a small subtropical river-estuary system	8
Unravelling the impact of lithofacies on the composition of NSO compounds in residual and expelled fluids of the Barnett, Niobrara and Posidonia formations	8
Molecular n-alkyl leaf waxes of three dominant plants from the temperate forest in South America	8
Assessment of the molecular-level compositional heterogeneity of natural organic matter in bentonites intended for long-term used nuclear fuel storage	7
Identifying marine and freshwater overprints on soil-derived branched GDGT temperature signals in Pliocene Mississippi and Amazon River fan sediments	7
Hydrocarbon transformations in sediments from the Cathedral Hill hydrothermal vent complex at Guaymas Basin, Gulf of California – A chemometric study of shallow seep architecture	7
The molecular and sulfur isotope distribution of volatile compounds in natural gases and condensates from Alberta, Canada	7
Effects of environmental history and post-depositional processes on the organic matter record of Lake Łebsko, Poland	7
Extended series of tricyclic terpanes in the Mesoproterozoic sediments	7
Carbon isotopic composition of leaf wax n-alkanes in mangrove plants along a latitudinal gradient in Brazil	7
A novel biodegradation parameter derived from bicyclic sesquiterpanes for assessing moderate levels of petroleum biodegradation	7
Monoterpenylabietenoids, novel biomarkers from extant and fossil Taxodioideae and sedimentary rocks	7
Imprint of Kairei and Pelagia deep-sea hydrothermal systems (Indian Ocean) on marine dissolved organic matter	7
Petroleum generation and migration in the southern Tyumen region, Western Siberia Basin, Russia	7
Characterizing ecosystem-driven chemical composition differences in natural and drained Finnish bogs using pyrolysis-GC/MS	7
Hydrothermal experiments involving methane and sulfate: Insights into carbon isotope fractionation of methane during thermochemical sulfate reduction	7
Pyrolysis of 1-methylnaphthalene involving water: Effects of Fe-bearing minerals on the generation, C and H isotope fractionation of methane from H2O-hydrocarbon reaction	7
Effects of Mississippi valley-type minerogenetic metal sulfates on thermochemical sulfate reduction, studied by hydrous pyrolysis	7
Deconvolution of post- and pre-salt petroleum sources in southeastern offshore Brazilian basins	7
Revisiting the precursors of the most abundant natural products on Earth: A look back at 30+ years of bacteriohopanepolyol (BHP) research and ahead to new frontiers	6
Organic geochemical heterogeneity of the Cretaceous Abu Gabra Formation and reassessment of oil sources in the Sufyan sub-basin, Sudan	6
Influence of hydrothermal vent activity on GDGT pool in marine sediments might be less than previously thought	6
Revisiting paleoenvironmental analyses and interpretations of organic-rich deposits: The importance of TOC corrections	6
Impact of selective degradation on molecular isotope compositions in oxic and anoxic marine sediments	6
Molecular and stable isotope analysis (δ13C, δ2H) of sedimentary n-alkanes in the St. Lawrence Estuary and Gulf, Quebec, Canada: Importance of even numbered n-alkanes in coastal systems	6
Molecular and carbon isotope composition of hydrocarbons from ambers of the Eocene Shenbei coalfield (Liaoning Province, NE China)	6
Leachable soil black carbon after biochar application	6
Lipid biomarker estimates of seasonal variations of aerosol organic carbon sources in coastal Qingdao, China	6
Surface soil n-alkane molecular and δD distributions along a precipitation transect in northeastern China	6
Biomarkers reveal Eocene marine incursions into the Qaidam Basin, north Tibetan Plateau	6
Understanding the disparity in n-alkane production among angiosperms and gymnosperms from the higher Himalayas: Inferences drawn from a Machine Learning approach	6
Isotopic evidence for the formation of 25-norhopanes via in situ biodegradation in the Permian Lucaogou shales, southern Junggar Basin	6
Extended chain length alkenoates differentiate three Isochrysidales groups	6
Evaluation of anhydrosugars as a molecular proxy for paleofire activity: A case study on a Holocene sediment core from Agios Floros, Peloponnese, Greece	6
NSO-compounds in oil-bearing fluid inclusions revealed by FT-ICR-MS in APPI (+) and ESI (−) modes: A new method development	6
Phosphorus limitation affects the molecular composition of Thalassiosira weissflogii leading to increased biogenic silica dissolution and high degradation rates of cellular carbohydrates	6