OOIR: Observatory of International Research

Papers

(The TQCC of Organic Geochemistry is 4. 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 2021-09-01 to 2025-09-01.)

Article	Citations
On the validity of position specific carbon isotopic analysis (PSIA) of propane	34
Editorial Board	33
GEOCHEMISTRY ARTICLES – March 2022	31
Complexity of the serpentinization lipidome	29
Exceptionally high contents of rearranged hopanes in a late Permian section, southern Sydney Basin, Australia	21
Direct evidence of gas flushing oil in deep reservoirs: Insight from integrated fluid inclusion analyses	21
Geochemical analysis of bituminous samples from the Pre-Pottery Neolithic B site of Nahal Efe (Northern Negev, Israel): Earliest evidence in the region and an example of alteration of the Dead Sea bit	20
Editorial Board	19
Introduction to Xplorer, Hybrid and Early-Career Virtual Special Issue	19
Differential evolution of extracted bitumen and solid bitumen in a hybrid shale system	18
Environmental controls on the distribution of GDGT molecules in Lake Höglwörth, Southern Germany	18
Methylation and demethylation of naphthalene homologs in highly thermal mature sediments	16
In-situ provenance of brGDGTs in peat sediments: A case study from southern China and a comparison of global results	16
Molecular composition of dissolved organic matter in saline lakes of the Qing-Tibetan Plateau	16
Early stages of Type I-S kerogen formation revealed by Rock-Eval® 7S analysis of sediment from a modern halo-alkaline lake (Dziani Dzaha, Mayotte)	16
Editorial Board	15
Analytical inconsistencies in the measurement and reporting of IP25, IPSO25 and related biomarkers for paleo sea ice reconstruction	15
Molecular and carbon isotopic evidence for the possible origin of 13α(n-alkyl)-tricyclic terpanes in Mesoproterozoic bitumens from the Yanliao Rift, North China	14
Geochemistry Articles – April 2024	14
Effects of fluid pressure on the occurrence of multi-phase oil and accumulation of light oil and condensate from crude oil cracking: Insights from modified gold tube pyrolysis experiments	14
Geochemistry Articles – July 2024	14
Assessment of branched glycerol monoalkyl glycerol tetraether (brGMGT)-based paleothermometry in the 250,000-year sediment record of Lake Chala, equatorial East Africa	13
Editorial Board	13
Soil chemistry, temperature and bacterial community composition drive brGDGT distributions along a subarctic elevation gradient	13
Robert Alexander Obituary died 28th July 2023 (82 years)	13

Annotation of DOM metabolomes with an ultrahigh resolution mass spectrometry molecular formula library	13
Chemodiversity of soil dissolved organic matter complementally improved by stepwise elution and electrospray ionization modes	13
Comment: Suppression of vitrinite reflectance by bitumen generated from liptinite during hydrous pyrolysis of artificial source rock by Peters et al. (2018)	13
Impacts of temperature and fluid seepage on organic matter composition in sediments of an active hydrothermal basin	12
A new empirical approach for rapid quantification of organic and pyritic sulfur in sedimentary rocks using the Rock-Eval 7S	12
Fire-induced shifts in stalagmite organic matter mapped using Synchrotron infrared microspectroscopy	11
Three major types of trimethyl-alkylbenzenes and significance for the genesis of reservoir bitumens from the northwestern Sichuan Basin, South China	11
Variability and composition of amino acids and amino sugars in sediment cores of the Changjiang Estuary	11
Distributions of vanadyl and nickel porphyrins in the Woodford Shale and selective chelation of metal species by different tetrapyrrole configurations	11
Geochemistry Articles – April 2025	10
Controlling factors and geological applications of the drimane-skeleton compound content and composition of crude oils in complex petroleum systems: New insights from the Western Pearl River Mouth Bas	10
Practical considerations for amino acid isotope analysis	10
Editorial Board	10
Polycyclic aromatic sulfur heterocycles used as molecular markers in crude oils and source rocks	10
GEOCHEMISTRY ARTICLES – June 2022	10
Organic matter composition and thermal maturity evaluation of Mesoproterozoic source rocks in the Beetaloo Sub-Basin, Australia	10
Impact of organic carbon reworking upon GDGT temperature proxies during the Paleocene-Eocene Thermal Maximum	10
Generation of carbazoles in Type II-S source rocks: Experimental analysis for kinetic parameters estimation	10
Geochemistry Articles – January 2024	10
Biomarkers reveal Eocene marine incursions into the Qaidam Basin, north Tibetan Plateau	9
Using ToF-SIMS analyses for analysing individual oil inclusions of different fluorescence colours in a single quartz crystal from the Barrandian (Czech Republic)	9
Bacterial physiology highlighted by the δ13C fractionation of bacteriohopanetetrol isomers	9
Pyrolysis experiments of model compounds to explore carbon isotope fractionation in propane from natural gas	9
Mid- to Late-Holocene branched GDGT-based air temperatures from a crater lake in Cameroon (Central Africa)	9
Intramolecular carbon isotopic rollover in propane from natural gas reservoirs of the Santanghu Basin: Insights into chemical structure of kerogen	9
Contribution of abiotic methane polymerization of C2+ hydrocarbons in highly mature natural gas reservoirs	8
Reply to Comment by M.D. Lewan	8
GEOCHEMISTRY ARTICLES – November 2021	8
GEOCHEMISTRY ARTICLES – October 2022	8
Geochemistry Articles – October 2024	8
Seasonality of amino acid enantiomers and microbial communities at MOLA time series in the NW Mediterranean Sea	8
Identifying the drivers of GDGT distributions in alkaline soil profiles within the Serengeti ecosystem	8
High abundances of degraded triterpenoids in Miocene turbiditic sediments of south-central Hokkaido, Japan	8
Robust determination of kerogen properties in organic-rich mudrocks via Raman Spectroscopy	8
The global distribution of Isoprenoidal Glycerol Dialkyl Diethers (isoGDDs) is consistent with a predominant degradation origin	8
Characterisation of radiogenic monoalkenes in Australian oils and condensate	8
Hydrogen isotope biogeochemistry of plant waxes in paired lake catchments	8
GEOCHEMISTRY ARTICLES – August 2023	7
Impact of biodegradation on methyltrimethyltridecylchromans (MTTCs) in crude oils from the Bohai Bay Basin, China	7
The bacterial influencing mechanisms of salinity fluctuations in a brackish-water lake on the dissolved organic matter characteristics of pore water	7
Editorial Board	7
Triaromatic dinosteroids – Isomeric distributions and their geochemical significance	7
Obituary for Prof. Dr. Dietrich Welte (1935–2025)	7
Geochemical rationalisation for the variable oil quality in the Orcutt reservoir, California, USA	7
Editorial Board	7
Geochemical fingerprints of Dongpu Depression crude oils in Bohai Bay Basin, northern China: Insights from biomarkers and isotopic compositions of selected alkylnaphthalenes and alkylphenanthrenes	7
Five series of benzohopanes in early Cretaceous sediments from the Chaoyang Basin, NE China	7
Interaction between peptide and solid lignin suggest mechanisms of abiotic covalent bond formation	6
A new method for the quantification of hydrogen contribution from water to methane during hydrous kerogen pyrolysis	6
Heterotrophic origin and diverse sources of branched glycerol monoalkyl glycerol tetraethers (brGMGTs) in peats and lignites	6

Solvent effect in Soxhlet extraction of source rocks	6
Compositions, structures, and confined pyrolysis of the alga Chlorella and its nonhydrolyzable fractions	6
Geochemistry Articles – June 2025	6
Impact of water depth on the distributions and proxies of isoprenoidal hydroxylated GDGTs in the Mediterranean Sea and the Red Sea	6
Distribution and carbon isotopic composition of diploptene from epiphytic bryophytes in Wuhan, central China	6
Isoprenoidal GDGTs and GDDs associated with anoxic lacustrine environments	6
Editorial Board	6
The giant barrel sponge Xestospongia muta takes up dissolved organic matter from benthic cyanobacterial mats	6
Fast quantitative analysis of n-alkanes, PAHs and alkenones in sediments	6
GEOCHEMISTRY ARTICLES – July 2021	6
Natural and laboratory-induced maturation of kerogen from the Vaca Muerta Formation: A comparison study	6
Characteristics of n-alkyl lipids in cultivated Sphagnum and their preservation potential in the topsoil of Sphagnum farmlands in southwest China	5
Structural characterization and confined pyrolysis of resistant aliphatic biopolymer derived from cyanobacteria	5
The biological source and paleoenvironment implication of rare short-chain lanostanes in alkaline lacustrine sediments	5
GEOCHEMISTRY ARTICLES – December 2021	5
Re-arranged hopanes and novel re-arranged tricyclic terpanes in Paleozoic rock extracts and oils in the Anadarko Basin, Oklahoma	5
Effects of inorganic sulfur species on hydrocarbon conversion and 34S isotope fractionation during thermal maturation of Type II kerogen	5
Dissolved oxygen concentrations influence the distribution of isoGDGTs in a deep Lake Fuxian in China: Implications for the use of TEX86 in stratified lakes	5
Impact of terrestrial organic matter input on distributions of hydroxylated isoprenoidal GDGTs in marine sediments: Implications for OH-isoGDGT-based temperature proxies	5
Characteristics of light hydrocarbons under the superimposed influence of biodegradation and subsequent thermal maturation	5
Correlations between biomarkers of varying bioavailability and putative hydrocarbonoclastic bacteria in an Early-Eocene marlstone sedimentary record	5
Geochemical constraints on the hydrocarbon generation and expulsion in source rocks with different primary organic matter compositions: A case study on the Lucaogou Formation in the Jimusaer Sag, Jung	5
Editorial Board	5
Organic geochemical heterogeneity of the Cretaceous Abu Gabra Formation and reassessment of oil sources in the Sufyan sub-basin, Sudan	5
Gas-phase reaction of CH4 and H2S – Evidence from pyrolysis experiments and case study from the Sichuan Basin	5
Diagenetic fate of glycerol ethers revealed by two novel isoprenoid hydroxyphytanyl glycerol monoethers and non-isoprenoid alkyl glycerol ethers	5
Glycerol dialkyl glycerol tetraether signatures in tropical mesotidal estuary sediments of Qua Iboe River, Gulf of Guinea	5
Geochemistry Articles – September 2023	5
Comparing extraction methods for analyzing n-alkyl lipids in shelf sediments from the China Sea	5
C/H isotope fractionation of hydrocarbon gases from hydrogenation of organic matter: Insights from hydrothermal experiments	5
Seasonal temperature dependency of aquatic branched glycerol dialkyl glycerol tetraethers: A mesocosm approach	5
Biodegradation sequence of coal organic matter and mechanism of biomethane formation in secondary biogenic gas accumulation areas	5
Diamondoids in petroleum: Their potential as source and maturity indicators	4
Combining Rock-Eval® thermal analysis and thermochemolysis to evaluate the influence of forest management on soil organic matter quality and stability	4
Elucidating the composition of organic matter in water-repellent forest soils using analytical pyrolysis combined with gas chromatography–mass spectrometry (Py-GC–MS)	4
Geochemistry Articles – December 2023	4
Exploring the application of TEX86 and the sources of organic matter in the Antarctic coastal region	4
Dissolved organic matter molecular composition controls potential biodegradability	4
Incorporation of wet gases to kerogen in petroleum formation and evolution	4
A novel protocol for extracting 3-hydroxy fatty acids from soil with microwave-assisted acid digestion	4
Contrasting particulate organic carbon and sediment trophic status in two Antarctic fjords: Hope Bay and Collins Bay	4
Characterizing ecosystem-driven chemical composition differences in natural and drained Finnish bogs using pyrolysis-GC/MS	4
Reply to “Discussion on the studies of position-specific carbon isotopes of propane by Li et al. (2018), Zhang et al. (2022) and Shuai et al. (2023)”	4
Resource potential of the Proterozoic–Paleozoic Carrara depocentre, South Nicholson region, Australia: Insights from stratigraphic drilling	4
Influence of vegetation type on brGDGTs: Results from surface soils beneath sub-alpine forest and grassland under the same climatic conditions	4
Anisole-based assessment for the quantification of methoxyl groups in lignin-rich biomass	4
A paleoenvironmental and ecological analysis of biomarkers from the Eocene Fossil Basin, Green River Formation, U.S.A.	4
Occurrence and origin of perylene in Paleogene sediments from the Tasmanian Gateway, Australia	4
Structural properties of organic matter in marine-continental transitional shales and impacts on methane accumulation	4
Lacustrine records of Paleocene-Eocene Thermal Maximum (PETM) triggered by volcanic activity	4
Extended chain length alkenoates differentiate three Isochrysidales groups	4
Editorial Board	4
Phase behavior and GOR evolution using a natural maturity series of lacustrine oil-prone shale: Implications from compositional modelling	4
Carbon isotopic composition of leaf wax n-alkanes in mangrove plants along a latitudinal gradient in Brazil	4
GEOCHEMISTRY ARTICLES – April 2021	4
Editorial Board	4
Reservoir oil geochemistry in the northern Western Desert of Egypt – High-resolution mass spectrometry and stable carbon isotope characterization	4
Biomarker signatures in host rocks and their co-occurring fossil plants from northern Scotland	4
Editorial Board	4
Editorial Board	4
Reforestation in northeastern China increased the soil microbial necromass carbon accumulation by influencing glomalin and enzyme activities	4