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Text-fig. 3. Borehole section in the Blansko Graben with lithology, distribution of palynomorphs, macroflora and macrofauna (modified after Čech, unpublished report). 1 – Spesovicornea pacltovae, 2 – Platanus sp., 3 – Myrtophyllum angustum (VEL.) KNOBOCH, 4 – Gleichenia sp.), 5 – percentage of land-derived palynomorphs, 6 – percentages of marine palynomorphs, 7 – glauconite, 8 – pyrite nodules, 9 – macrofauna, 10 – productive palynological samples, 11 – carbonized roots, 12 – conglomerate, 13 – sandstone, 14 – claystone, 15 – coal, 16 – granite and granodiorite of the Brno pluton. in Spesovicornea Pacltovae Gen. Nov. Et Sp. Nov., A New Elateroid Sporomorph From The Bohemian Cenomanian (Czech Republic)
Text-fig. 3. Borehole section in the Blansko Graben with lithology, distribution of palynomorphs, macroflora and macrofauna (modified after Čech, unpublished report). 1 – Spesovicornea pacltovae, 2 – Platanus sp., 3 – Myrtophyllum angustum (VEL.) KNOBOCH, 4 – Gleichenia sp.), 5 – percentage of land-derived palynomorphs, 6 – percentages of marine palynomorphs, 7 – glauconite, 8 – pyrite nodules, 9 – macrofauna, 10 – productive palynological samples, 11 – carbonized roots, 12 – conglomerate, 13 – sandstone, 14 – claystone, 15 – coal, 16 – granite and granodiorite of the Brno pluton.
Figure 6 in Rove beetle communities (Coleoptera: Staphylinidae) in the rock dumps after coal mining
Figure 6. Factors "Temperature" (A), "Year" (B) and environmental factors (C) contribution into rove beetles abundance on the study sites.
Figure 5 in Rove beetle communities (Coleoptera: Staphylinidae) in the rock dumps after coal mining
Figure 5. Dynamic density of rove beetles (A) and their dominant subfamilies (B) on the dumps of the Kedrovsky coal mine (mean ± SD).
Figure 3 in Rove beetle communities (Coleoptera: Staphylinidae) in the rock dumps after coal mining
Figure 3. Rank distribution of Staphylinidae species (the rank of species is along the abscissa axis; abundance, % is along the ordinate axis) in the rock dumps of the Kedrovsky coal mine for the entire period of research.
Figure 2 in Rove beetle communities (Coleoptera: Staphylinidae) in the rock dumps after coal mining
Figure 2. Numerical characteristics of some taxonomic categories of rove beetles in the studied area of the Kedrovsky coal mine (general number).
Figure 4 in Rove beetle communities (Coleoptera: Staphylinidae) in the rock dumps after coal mining
Figure 4. Similarity (according to Jaccard, IJ) of the rove beetle population in the sites of the Kedrovsky coal mine (the number at the nodes mean the bootstrap confidence intervals obtained based on 999 iterations are indicated).
Figure 6 in Diversity of ground-dwelling arthropods on overburden dumps after coal mining
Figure 6. The ratio of beetle families in the study site (with the exception of Carabidae and Staphylinidae).
Fig. 13 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 13. Niutoushania (A, B) and Edriosteges (C–G) from the 1st member of the Lungtan Formation of Daijiagou. A, B. Niutoushania chongqingensis Chen sp. nov., anteroventral (A1), posterior (A2), and dorsal (A3) views of holotype NMV P309641 (A). B. Fragment of a ventral external mold NMV P309642 showing regularly spaced costae and fine spine bases. C–G. Edriosteges poyangensis (Kayser, 1883), dorsal (C, D2, E, F), anterodorsal (D1), and ventral (G) views of four dorsal external molds NMV P309632 (C), NMV P309630 (D), NMV P309629 (E), NMV P309631 (F), and a ventral valve NMV P309633 (G).
Fig. 11 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 11. Ventral interior of Transennatia gratiosa (Waagen, 1884); based on a ventral internal mold NMV P309639.
Fig. 14 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 14. Cardinal process of Chengxianoproductus cf. changxingensis Liao and Meng, 1986 (based on specimen NMV P309640).
Fig. 12 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 12. Interiors of Niutoushania chongqingensis Chen sp. nov. (based on specimen NMV P309641); ventral valve (A) and dorsal valve (B).
Fig. 15 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 15. Ventral interior of Permophricodothyris grandis (Huang, 1933) showing well−developed muscle scars (based on specimen NMV P309621).
Fig. 9 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 9. Selected serial sections of the ventral umbo of Meekella beipeiensis Chen sp. nov. (based on specimen NMV P309627) showing closely situated, parallel dental plates. The numbers are distance from the ventral beak; the orientation of the sections is with ventral surfaces upward.
Fig. 10. A in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 10. A. Meekella kueichowensis (Huang, 1933), dorsal (A1), ventral (A2), and lateral (A3) views of NMV P309622. B. Chengxianoproductus cf. changxingensis Liao and Meng, 1986, ventral (B1), posterior (B2), lateral (B3), and dorsal (B4) views of NMV P309640 (B); B5, enlargement of fine, densely arranged spine bases of B1. C, D. Spinomarginifera alpha Huang, 1932, lateral (C1), posterior (C2), ventral (C3), and dorsal (D) views of a complete specimen NMV P309643 and a dorsal external mold NMV P309644. E–H. Transennatia gratiosa (Waagen, 1884), ventral (E1, G, H1), anteroventral (E2, H2), posterior (E3, H3), lateral (E4, H4), and internal (F) views of a ventral internal mold NMV P309639 (E), and latex replica NMV P309638 (F) of the ventral internal mold (E –E), a ventral internal mold NMV P309636 (G) and a dorsal external mold NMV P309637 (H –H). A, E, F, G, from the 4th member of the Lungtan For1 4 1 4 mation of Daijiagou; B, from the 1st member of the Lungtan Formation of Daijiagou; C, D, H, from the 5th member of the Lungtan Formation of Daijiagou.
Fig. 6 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 6. Global stratigraphic distributions of the Lungtan brachiopod faunas. Permian chronostratigraphic framework follows International Union of Geological Sciences (2002). Conodont zones are after Mei et al. (1994) and Jin et al. (1998). The G/L mass extinction horizon corresponds to the biostratigraphic G/L boundary. The extinction interval is defined by the late Capitanian conodonts Jinogondolella granti Zone and the earliest Wuchiapingian Clarkina postbitteri Zone. Brachiopod genera include 1, Spinomarginifera; 2, Edriosteges; 3, Meekella; 4, Transennatia; 5, Perigeyerella; 6, Permophricodothyris; 7, Paraspiriferina; 8, Magniderbyia; 9, Niutoushania; 10, Chengxianoproductus; 11, Peltichia. Brachiopod species include 12, Edriosteges poyangensis; 13, Transennatia gratiosa; 14, Permophricodothyris grandis; 15, Magniderbyia sp. indet.; 16, Meekella pusilloplicata; 17, Me. kueichowensis; 18, Me. beipeiensis; 19, Spinomarginifera lopingensis; 20, Niutoushania chongqingensis; 21, Chengxianoproductus cf. changxingensis; 22, Paraspiriferina sp.; 23, Perigeyerella costellata; 24, Peltichia zigzag; 25, Spinomarginifera alpha.
Fig. 8 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 8. Reconstruction of ventral interior of Perigeyella costellata Wang, 1955 (based on specimen NMV P309620).
Fig. 5 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 5. Abundance of the Edriosteges poyangensis–Spinomarginifera lopingensis Association. A total of 51 specimens were collected from a shell bed at the basal Lungtan Formation.
Fig. 3 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 3. Correlations of the described faunas with previously published brachiopod assemblages from South China. The dashed lines indicate that the zonal boundaries are not well defined.
Fig. 2 in Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series of South China
Fig. 2. Composite stratigraphy of the Lungtan Formation at the Daijiagou and Chuanmu sections, showing lithology, microfacies and fossil horizons. A. Daijiagou section. B. Chuanmu section. Lithology: 1, coarse sandstone; 2, alternating mudstone and sandstone; 3, siltstone; 4, fine sandstone; 5, clay; 6, coal seam; 7, cherty limestone; 8, bioclastic limestone; 9, limestone. Microfacies: 1, low−angle cross bedding; 2, wavy bedding; 3, bimodal cross bedding; 4, brackish water ironstone concretions; 5, black shale; 6, coal seam; 7, sandy mudstone; 8, siltstone; 9, quartz sandstone; 10, alternating siliceous shale and cherty limestone; 11, sparite; 12, grainstone−packstone; 13, roots (coal seats); 14, weathered clay; 15, cherty limestone.
Geocatalytically generated methane from low-maturity coal and shale source rocks at low temperatures (80–120 ◦C) over 52 months
<p><strong>Submitted data was used to write an article:</strong> Liu, B., Schimmelmann, A., Mastalerz, M., Drobniak, A., Ma, X., Geocatalytically generated methane from low-maturity coal and shale source rocks at low temperatures (80−120 °C) over 52 months. International Journal of Coal Geology, 272, 104250. https://doi.org/10.1016/j.coal.2023.104250 </p> <p> </p> <p><strong>Funding acknowledgments: </strong>This study is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division under Award Number DE-SC0006978. B. Liu and X. Ma received financial support from the<br>National Natural Science Foundation of China (Nos. 42202167 and 41872141). A. Drobniak received funding from the Polish National Agency for Academic Exchange within the Polish Returns Programme (BPN/PPO/2021/1/00005/DEC/1) and the National Science Center, Poland (2022/01/1/ST10/00024).</p> <p> </p> <p><strong>Article Abstract</strong>: Geocatalytic methanogenesis has been proposed to contribute to methane generation from low-maturity coal and shale source rocks. This study contributes further evidence for geocatalytic methanogenesis from low-maturity source rocks based on long-term experiments lasting up to 52 months. Samples from the Upper Devonian New Albany Shale (Ro 0.54 %) and Springfield Coal No. 2 (Pennsylvanian; Ro 0.54 %) were heated in glass tubes at 80, 100, and 120 ◦C for 52 months. Sample aliquots from the Upper Cretaceous Second White Specks Formation (Ro 0.42 %) were heated in gold tubes at 80 and 100 ◦C for 42 months at elevated hydrostatic pressures of 100 to 300 MPa. The product gases — methane (CH4) and carbon dioxide (CO2) — were collected and quantified, and gas yields were corrected for leakage from imperfectly closed pores in samples during heating. The results show that longer heating produced more CH4. The average CH4 yields from New Albany Shale and Springfield Coal No. 2 are 0.47 and 3.0 μmol CH4 per gram of total organic carbon (TOC) over 52 months of heating. Elevated hydrostatic pressure caused lower CH4 yields from the Second White Specks Formation (3.82 to 1.20 μmol g-1 TOC), suggesting that pressure can retard methanogenesis. Maceral type critically controls the methanogenesis potential of low-maturity coal and shale source rocks. Results of this study provide important insights to the origin of natural gas in low-maturity sedimentary basins.</p>
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