Organic Geochemistry最新文献

{"title":"Nanometer-scale relationships between sedimentary organic matter molecular composition, fluorescence, cathodoluminescence, and reflectance: The importance of oxygen content at low thermal maturities","authors":"Aaron M. Jubb ,&nbsp;Paul C. Hackley ,&nbsp;Ryan J. McAleer ,&nbsp;Jing Qu","doi":"10.1016/j.orggeochem.2025.104990","DOIUrl":"10.1016/j.orggeochem.2025.104990","url":null,"abstract":"<div><div>Molecular characterization of sedimentary organic matter (SOM), termed macerals, is a common goal when seeking to understand petroleum generation as well as other geologic processes in deep time. However, unambiguous measurement of discrete macerals is challenging due to the small size of organic particles in sedimentary rocks, the proximity of different organic matter types to one another, mineral-organic matter interactions, and maceral mixing that occurs during SOM isolation prior to ex situ analysis. The recent advent of infrared spectrometers capable of nanometer-scale resolution and the application of these technologies to geologic samples has enabled advances in rapid, in situ molecular characterization of SOM allowing for insights into paleoenvironmental processes, such as organic matter productivity and preservation, among others. Here we employ one such technology, optical photothermal infrared (OPTIR) spectroscopy, to map SOM functional group distributions at 500-nm resolution in a sample from the Lower Cretaceous Sunniland Limestone of the South Florida Basin. Examined fields of view include occurrences of amorphous organic matter (AOM), inertinite, micrinite, solid bitumen, telalginite, and vitrinite. OPTIR data from these macerals are compared against traditional organic petrographic data from the same organic grains including fluorescence intensity and white light reflectance as well as against cathodoluminescence response, an emerging organic petrographic approach. Maceral oxygen content (using carbonyl functional group abundance as a proxy) is observed to vary widely between maceral types but correlates strongly with fluorescence and cathodoluminescence intensity as well as against reflectance. These findings highlight the important role that oxygen content plays in determining the optical properties of SOM and further demonstrate the ability of OPTIR to discriminate subtle molecular differences between SOM types.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"204 ","pages":"Article 104990"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exceptionally high contents of rearranged hopanes in a late Permian section, southern Sydney Basin, Australia","authors":"Inna Kampoli,&nbsp;Simon C. George","doi":"10.1016/j.orggeochem.2025.104986","DOIUrl":"10.1016/j.orggeochem.2025.104986","url":null,"abstract":"<div><div>A suite of 19 late Permian–early Triassic outcrop samples from the southern Sydney Basin were analysed by gas chromatography-mass spectrometry. Three series of rearranged hopanes were identified in the samples: 18α(H)-neohopanes, 17α(H)-diahopanes, and the early-eluting 9,15-dimethyl-25,27-bisnorhopane homologues. There is very large variability in the relative abundance and distribution of rearranged hopanes compared to the 17α(H)-hopanes between samples. There is one group of samples, associated with the “dead zone” after the Permian-Triassic mass extinction event, and deposited above the uppermost coal seam, where rearranged hopanes are not present, while in other samples their abundance is very high, and the C₃₀ diahopane/C₃₀ αβ hopane ratio reaches 93. No dependency on thermal maturity or depositional water salinity were observed, and there is no correlation between the presence and distribution of rearranged hopanes and diasteranes. There is a positive correlation between the presence of monomethylalkanes, interpreted to be associated with cyanobacterial input, and a high relative abundance of rearranged hopanes. The samples with the highest relative abundances of rearranged hopanes and monomethylalkanes are from the Tongarra Coal at Austinmer Beach, where three coal seams are separated by laterally-continuous pale-coloured ash-fall tuffs. The high abundance of terrigenous organic matter, deposited under fresh water sub-oxic conditions, together with extensive volcanic activity, may be the main factors contributed to the formation and enrichment of these exceptional amounts of rearranged hopanes in the Sydney Basin.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"204 ","pages":"Article 104986"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemistry Articles – January 2025","authors":"","doi":"10.1016/j.orggeochem.2025.104984","DOIUrl":"10.1016/j.orggeochem.2025.104984","url":null,"abstract":"","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"204 ","pages":"Article 104984"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized sample cleanup for compound-specific isotope analysis of polycyclic aromatic hydrocarbons in complex environmental samples","authors":"Md Samrat Alam ,&nbsp;Jason M.E. Ahad ,&nbsp;Colin A. Cooke","doi":"10.1016/j.orggeochem.2025.104966","DOIUrl":"10.1016/j.orggeochem.2025.104966","url":null,"abstract":"<div><div>Compound-specific isotope analysis (CSIA) using gas chromatography – isotope ratio mass spectrometry is a powerful tool to discriminate sources of polycyclic aromatic hydrocarbons (PAHs). However, interferences from co-eluting peaks often prevent accurate isotopic measurements in complex environmental samples. Purification of sample extracts is thus a crucial analytical step. In this study, we report a rapid and effective cleanup method using high-performance liquid chromatography (HPLC) that provides high integrity isolation of PAHs suitable for CSIA. The method reported here was effective at purifying both parent and alkylated PAHs from several highly complex matrices, including river sediments, bitumen, petroleum coke, and wildfire ash. HPLC separation removed much of the interfering aromatic unresolved complex mixture (UCM) and significantly improved chromatography, yielding well-resolved PAH peaks with high intensities and signal-to-noise ratios. Recoveries and purities of target compounds following HPLC separation were 70 ± 13% and 97 ± 5%, respectively. No noticeable differences (± 0.5‰) were observed in the carbon isotope values (δ¹³C) of standards subjected to extraction and HPLC purification steps, indicating negligible isotopic fractionation associated with the protocol. The δ¹³C values for individual PAHs in samples were comparable to those previously reported for the same sample types, further demonstrating this method’s high level of accuracy and precision. Additionally, this technique allows for isotopic characterisation of a larger number of 4- to 5-ring PAHs compared to many previous studies due to removal of much of the later-eluting UCM, potentially providing greater insight into source discrimination and understanding of PAH deposition and transformation processes. While the focus of this investigation was on PAHs, this technique could be adapted to other problematic compounds targeted for CSIA.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104966"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sources of bacterial 3-hydroxy fatty acids in Liangzihu Lake from central China: Implications for paleoclimate reconstruction","authors":"Honghai Wang ,&nbsp;Yi Yang ,&nbsp;Canfa Wang ,&nbsp;Shucheng Xie","doi":"10.1016/j.orggeochem.2025.104949","DOIUrl":"10.1016/j.orggeochem.2025.104949","url":null,"abstract":"<div><div>Bacterial 3-hydroxy fatty acids (3-OH-FAs) derived proxies are new tools for paleoclimate reconstruction. However, their effectiveness in temperature reconstruction in lake environments remains unclear. We investigated the compositions of 3-OH-FA and bacterial community across a transect from nearshore soils to water column and surface sediments in the center of Liangzihu Lake (LZH), central China, to elucidate the origins of 3-OH-FA within the lake environments and to evaluate their potential as temperature proxies. The 3-OH-FA in lake center sediments was found to be produced in situ, which can be further supported by the 16S rRNA gene sequencing results. We quantified the input of soil organic matter (OM) in the lake using a δ¹³C_org based two-end member model. The contribution of soil OM ranged from above 50% in nearshore sediments to &lt; 20% in the lake center, reflecting a decreased influence of soil contribution offshore. Moreover, 3-OH-FA based temperature proxies, RAN₁₃ (the ratio of <em>anteiso</em> to <em>normal</em> C₁₃) and RIN₁₇ (the ratio of <em>iso</em> to <em>normal</em> C₁₇) were examined. The temperature estimates derived from the RAN₁₃ were close to the meteorological temperature, whereas the temperature estimates based on RIN₁₇ are lower than the measured temperature. Therefore, our study not only elucidates the sources of 3-OH-FAs within LZH but also evaluates the reliability of associated temperature indices, which provides insights into temperature reconstruction in lake sediment cores.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104949"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural properties of organic matter in marine-continental transitional shales and impacts on methane accumulation","authors":"Zhen Qiu ,&nbsp;Dongjun Song ,&nbsp;Jingyu Zhang ,&nbsp;Qin Zhang ,&nbsp;Wen Liu ,&nbsp;Weiliang Kong ,&nbsp;Guangyin Cai ,&nbsp;Wanli Gao ,&nbsp;Tianquan Qu","doi":"10.1016/j.orggeochem.2025.104946","DOIUrl":"10.1016/j.orggeochem.2025.104946","url":null,"abstract":"<div><div>The chemical structure characteristics of organic matter (OM) in marine-continental transitional (MCT) shales and the controls on shale gas accumulation were revealed through analysis of Raman spectroscopy, infrared spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and CO₂ adsorption tests on the Lower Permian Shan-2 shale OM samples from the eastern margin of the Ordos Basin. Organic matter in the high-mature shale is enriched in aromatic groups, with a noticeable condensation and polymerization of the chemical structure after ∼3.0 %R_mc (Raman-based R_o). As %R_mc increases from 2.30 to 3.42, the position of the (002) peak from the stacking of aromatic layers increases from 25.15° to 25.88° in XRD spectra, the spacing between aromatic layers (d₀₀₂) decreases from 0.3540 nm to 0.3444 nm, the calculated graphitization degree (level of OM transforming into graphite) gradually increases, and the carbon layers in the OM evolve from a chaotic shape to a better-oriented state in TEM images, directly indicating an elevated graphitized level. Release of heteroatoms from OM results in reduced average lateral size (L_a) and stacking height (L_c) of the aromatic layer, reaching minimum values at ∼3.0 to 3.2 %R_mc. The stacking of aromatic layers forms some organic micropores, as evidenced by similar micropore size distribution between OM and bulk shale samples, possibly favoring methane accumulation. These findings provide new insights into the factors that affect the gas accumulation characteristics in MCT shales.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104946"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized method for sequential extraction and analysis of polycyclic aromatic hydrocarbons, anhydrosugars and lipid biomarkers in speleothem carbonate and drip waters","authors":"Zhao Wang ,&nbsp;Jonathan D. Smolen ,&nbsp;Michael T. Hren ,&nbsp;Yuval Burstyn ,&nbsp;Isabel P. Montañez ,&nbsp;Jessica L. Oster ,&nbsp;Aida Zyba ,&nbsp;Erica A. Scarpitti","doi":"10.1016/j.orggeochem.2025.104961","DOIUrl":"10.1016/j.orggeochem.2025.104961","url":null,"abstract":"<div><div>Organic molecules such as <em>n</em>-alkyl lipids, terpenoids, anhydrosugars (AHs), and polycyclic aromatic hydrocarbons (PAHs) are found in karst systems, including cave deposits and drip waters, and provide a potential record of surface climate, ecosystem, and fire. However, it is analytically challenging to separate and measure multiple classes of organic compounds in these low-abundance matrices. Here, we present a simple, solid-phase sequential extraction method for the separation and purification of organic matter in carbonates (∼0.5 g, powder) and drip waters (300 mL, freeze-dried). This method offers efficient extraction and separation of hydrocarbons (<em>F_H</em>) (saturated and PAHs) (hexane/dichloromethane; 70/30; v/v) and polar lipid compounds (<em>F_P</em>) (e.g., AHs, sterols, and diterpenoids) (acetone) with a high recovery of standards in <em>F_H</em> (78 ± 7 %, on average) and <em>F_P</em> (90 ± 6 %, on average) across multiple matrices (i.e., speleothems and waters). Acid digestion was applied to the post-initial sequential extraction speleothem samples to fully liberate any remaining molecules trapped in the calcite crystals. We found that ∼10% of <em>n</em>-alkanes (C₂₀-C₃₂) and the smallest PAHs (naphthalene, methylated naphthalene, and fluorene) of total extractable hydrocarbons were left in the acid digestion, indicating that modification of the sequential extraction could be applied based on the target of interests. In total, this sequential solid-phase extraction method provides reliable separation of geochemically significant compound classes across different matrices within karst systems.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104961"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary geochemical records of the palaeovegetation and palaeoclimate evolution in the Pinghu Formation, Western Slope Belt, Xihu Sag, East China Sea Basin","authors":"Yanan Wang ,&nbsp;Lin Wei ,&nbsp;Xiong Cheng ,&nbsp;Hui Diao ,&nbsp;Wenjun Li ,&nbsp;Dujie Hou ,&nbsp;Jiansheng Li","doi":"10.1016/j.orggeochem.2025.104973","DOIUrl":"10.1016/j.orggeochem.2025.104973","url":null,"abstract":"<div><div>The sedimentary development of source rocks in marine-continental transitional facies is controlled mainly by the synergistic evolution of palaeovegetation and palaeoclimate. A set of marine-continental transitional coal seams in Xihu Sag of the East China Sea Basin were discovered at the end of the last century, whose lithology is mainly fine-grained sedimentary, with significant non-homogeneity and complex developmental control factors. Although systematic geochemical evaluations and hydrocarbon potential studies have been carried out on the source rocks in the Xihu Sag, few studies have focused on the fine-grained characterization of the palaeovegetation and palaeoclimate evolution during the depositional period. In this study, the palaeovegetation and palaeoclimate of the Pinghu Formation in Xihu Sag have been reconstructed based on biomarkers, pollen abundance, and trace elements. The organic matter of the Pinghu Formation is mainly input from terrigenous higher plants. The biomarkers reveal that gymnosperms gradually increase from the early to late stages of the Pinghu Formation, whereas pteridophytes exhibit the opposite trend. The contribution of gymnosperms to organic matter in the Wuyunting area is higher than in the Pinghu area. Furthermore, the number of temperate deciduous broad-leaved angiosperms (<em>Alnipollenites</em>, <em>Ulmipollenites</em>, <em>Momipites</em>, and <em>Juglanspollenites</em>) and mountain coniferous gymnosperms (<em>Pinuspollenites</em>) increased from the early to late stages of the Pinghu Formation, while the abundance of tropical/subtropical plants (<em>Quercoidites</em>, <em>Taxodiaceaepollenites</em>, and <em>Salixipollenites</em>) decreased. The vegetation succession<!--> <!-->is characterized by gradually transforming from tall gymnosperms to low-growing pteridophytes from the northern Wuyunting area to the southern Pinghu area. In conclusion, palynological data (including pteridophytes, angiosperms, and gymnosperms) and trace element ratios indicate that from the early to late stages of the Pinghu Formation, the palaeoclimate gradually became colder, with humidity and water depth decreasing.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104973"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemodiversity of soil dissolved organic matter complementally improved by stepwise elution and electrospray ionization modes","authors":"Shasha Zhuo,&nbsp;Rong Qin,&nbsp;Qing-Long Fu","doi":"10.1016/j.orggeochem.2025.104965","DOIUrl":"10.1016/j.orggeochem.2025.104965","url":null,"abstract":"<div><div>The chemodiversity of dissolved organic matter (DOM) molecules can affect the biogeochemical cycling of carbon and nitrogen in terrestrial and aquatic environments. In this study, the negative and positive ion modes of electrospray ionization (ESI(−) and ESI(+), respectively) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) were employed to reveal the chemical composition of seven soil DOM isolates by stepwise elution using different methanol/water solvents. The intensity percentage of CHON molecules in soil DOM detected in the ESI(+) mode was 4.6%–47.3% higher than that for the ESI(−) mode. The O/C ratio, H/C ratio, and the nominal oxidation states of the carbon value of soil DOM molecules linearly correlated (<em>R</em>² &gt; 0.8 for 72% number of stepwise eluted DOM isolates) with the increasing volume of methanol in the SPE elution solvents in dual ion modes, demonstrating the selective fractionation of oxygen-rich and highly polar molecules by methanol-poor solvents. This polarity-dependent fractionation is expected to be universal across different soils. These results suggest that combining the ESI(−) and ESI(+) modes with stepwise elution enables the comprehensive characterization of soil DOM composition, favouring the in-depth understanding of the critical roles of DOM in the biogeochemical cycles of carbon and nitrogen.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104965"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-pressure pyrolysis apparatus unravelling how fluid and lithostatic pressure matter in hydrocarbon expulsion","authors":"Weijiao Ma,&nbsp;Yunpeng Wang,&nbsp;Jinzhong Liu,&nbsp;Jinbu Li","doi":"10.1016/j.orggeochem.2025.104932","DOIUrl":"10.1016/j.orggeochem.2025.104932","url":null,"abstract":"<div><div>Improvement in thermal simulation technology will increases the accuracy of predictive geochemistry. A dual-pressure pyrolysis apparatus was developed, to precisely control the fluid pressure and lithostatic pressure during simulated source rock maturation. Two series of pyrolysis experiments were carried out, simulating the same generation process but different expulsion fluid pressure condition. Episodic hydrocarbon expulsion from source rocks under controlled lithostatic pressure and fluid pressure was for the first time observed through thermal simulation experiments. The results were applied to (1) hydrocarbon expulsion efficiency (HEE) analysis, and (2) compositional analysis of oil and gas expelled under different pressures. Results show that HEE is strongly influenced by both fluid and lithostatic pressures. If the oil discharged during depressurization and normal pressure is taken into account, the calculated HEE was 2–31 times the HEE that only considers the high fluid pressure expelled oil. Compared with previous experimental results, HEE under controlled dual pressure is also lower. Therefore, before applying the results of thermal simulation experiments to unconventional and deep oil/gas evaluation, sufficient attention should be paid to the pressure conditions of the experiments. Within the oil window, when the temperature and hydrostatic pressure of source rocks are dropped due to tectonic events such as uplift, they can discharge more oil and gas than before uplift, as a consequence of adjustment of over-pressured fluid to re-equilibrate to the adjacent hydrostatic conditions. In addition, during pressure and temperature reduction, the expelled fluids have a higher gas to oil ratio. This helps to indicate that sedimentary basins that experienced tectonic events still have great exploration potential. The temperature program, pressure setup, expulsion conditions in the two-series experiments is a tentative work tested on a representative source rock from the Triassic Yanchang Formation (Ordos Basin), indicating that control of fluid and lithostatic pressure are essential for improving the accuracy of thermal simulation predictions. The dual-pressure pyrolysis apparatus has high exploration relevance, particularly when quantitative results are integrated with the depositional, tectonic and thermal histories of specific source rocks.</div></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"203 ","pages":"Article 104932"},"PeriodicalIF":2.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}