Search Results - "SCHIMMELMANN, Arndt"

Porosity of Devonian and Mississippian New Albany Shale across a maturation gradient; insights from organic petrology, gas adsorption, and mercury intrusion by Mastalerz, Maria, Schimmelmann, Arndt, Drobniak, Agnieszka, Chen, Yanyan

“…The evolution of porosity in shales with increasing maturity was examined in a suite of five New Albany Shale samples spanning a maturity range from immature…”
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Characterization of chemical functional groups in macerals across different coal ranks via micro-FTIR spectroscopy by Chen, Yanyan, Mastalerz, Maria, Schimmelmann, Arndt

“…Fourier transform infrared spectra of a suite of coals of varying rank from peat to anthracite were obtained via reflectance micro-FTIR and traditional KBr…”
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Global spread of hypoxia in freshwater ecosystems during the last three centuries is caused by rising local human pressure by Jenny, Jean-Philippe, Francus, Pierre, Normandeau, Alexandre, Lapointe, François, Perga, Marie-Elodie, Ojala, Antti, Schimmelmann, Arndt, Zolitschka, Bernd

“…The spread of hypoxia is a threat to aquatic ecosystem functions and services as well as to biodiversity. However, sparse long‐term monitoring of lake…”
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A 9000-year flood history for Southern California: A revised stratigraphy of varved sediments in Santa Barbara Basin by Du, Xiaojing, Hendy, Ingrid, Schimmelmann, Arndt

“…The center of Santa Barbara Basin (SBB) preserves annual laminations through most of the Holocene providing an important locality for high-resolution late…”
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Small-Angle and Ultrasmall-Angle Neutron Scattering (SANS/USANS) Study of New Albany Shale: A Treatise on Microporosity by Bahadur, Jitendra, Radlinski, Andrzej P, Melnichenko, Yuri B, Mastalerz, Maria, Schimmelmann, Arndt

“…Small-angle neutron scattering (SANS) and ultrasmall-angle neutron scattering (USANS) techniques were applied to study the microstructure of several New Albany…”
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From extreme rainfall to drought: 250 years of annually resolved sediment deposition in Santa Barbara Basin, California by Hendy, Ingrid L., Napier, Tiffany J., Schimmelmann, Arndt

“…The Mediterranean climate of southern California is marked by droughts and extreme precipitation events. Here we use elemental variations generated by scanning…”
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Natural geological seepage of hydrocarbon gas in the Appalachian Basin and Midwest USA in relation to shale tectonic fracturing and past industrial hydrocarbon production by Schimmelmann, Arndt, Ensminger, Scott A., Drobniak, Agnieszka, Mastalerz, Maria, Etiope, Giuseppe, Jacobi, Robert D., Frankenberg, Christian

“…Geological hydrocarbon gas seepage is a major global source of atmospheric methane, ethane and propane as greenhouse gases and photochemical pollutants…”
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Natural seepage of shale gas and the origin of “eternal flames” in the Northern Appalachian Basin, USA by Etiope, Giuseppe, Drobniak, Agnieszka, Schimmelmann, Arndt

“…Natural hydrocarbon gas seeps are surface expressions of Petroleum Seepage Systems, whereby gas is ascending through faults from pressurized reservoirs that…”
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HYDROGEN ISOTOPIC (D/H) COMPOSITION OF ORGANIC MATTER DURING DIAGENESIS AND THERMAL MATURATION by Schimmelmann, Arndt, Sessions, Alex L., Mastalerz, Maria

“…Changes in the D/H ratio of sedimentary organic matter (SOM) during thermal maturation have been difficult to interpret because the effects of hydrogen…”
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Nitrogen isotopic exchange during maturation of organic matter by Schimmelmann, Arndt, Lis, Grzegorz P.

“…The definition of kerogen as the insoluble fraction of sedimentary organic matter leads to the assumption that all of its chemical constituents are…”
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Radiolysis via radioactivity is not responsible for rapid methane oxidation in subterranean air by Schimmelmann, Arndt, Fernandez-Cortes, Angel, Cuezva, Soledad, Streil, Thomas, Lennon, Jay T

“…Atmospheric methane is rapidly lost when it enters humid subterranean critical and vadose zones (e.g., air in soils and caves). Because methane is a source of…”
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Methane-Producing Microbial Community in a Coal Bed of the Illinois Basin by Strąpoć, Dariusz, Picardal, Flynn W, Turich, Courtney, Schaperdoth, Irene, Macalady, Jennifer L, Lipp, Julius S, Lin, Yu-Shih, Ertefai, Tobias F, Schubotz, Florence, Hinrichs, Kai-Uwe, Mastalerz, Maria, Schimmelmann, Arndt

“…A series of molecular and geochemical studies were performed to study microbial, coal bed methane formation in the eastern Illinois Basin. Results suggest that…”
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Organic matter geochemistry and petrography of Late Cretaceous (Cenomanian-Turonian) organic-rich shales from the Belle Fourche and Second White Specks formations, west-central Alberta, Canada by Furmann, Agnieszka, Mastalerz, Maria, Brassell, Simon C., Pedersen, Per Kent, Zajac, Nicholas A., Schimmelmann, Arndt

“…•Upper Belle Fourche Fm. contains kerogen Type II, not Type III as reported earlier.•Prevalence of short-chain n-alkanes (n-C13 to n-C19) in extracts of both…”
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A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam by Nguyễn-Đình, Thái, Nguyễn-Thùy, Dương, Nguyễn-Văn, Hướng, Ojala, Antti EK, Đỗ-Trọng, Quốc, Phan-Thanh, Tùng, Nguyễn Thị, Hồng, Thị Ánh Nguyễn, Nguyệt, Xuân Đinh, Thành, Thị Huyền Nguyễn, Trang, Sauer, Peter E, Schimmelmann, Arndt, Unkel, Ingmar

“…An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions…”
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Diversity and Composition of Methanotroph Communities in Caves by Webster, Kevin D., Schimmelmann, Arndt, Drobniak, Agnieszka, Mastalerz, Maria, Rosales Lagarde, Laura, Boston, Penelope J., Lennon, Jay T.

“…Methane oxidizing microorganisms (methanotrophs) are ubiquitous in the environment and represent a major sink for the greenhouse gas methane (CH4). Recent…”
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220Rn (Thoron) Geohazard in Room Air of Earthen Dwellings in Vietnam by Doiron, Kelsey, Nguyễn, Nguyệt Thị Ánh, Schimmelmann, Jan P., Nguyễn-Văn, Hướng, Nguyễn-Thuỳ, Dương, Schimmelmann, Arndt

“…Thoron’s (220Rn) contribution to α-radiation exposure is usually considered negligible compared to that of 222Rn (radon). Despite its short half-life of 55.6…”
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Radioactive Thoron 220Rn Exhalation From Unfired Mud Building Material Into Room Air of Earthen Dwellings by Nguyễn, Nguyệt Thị Ánh, Nguyễn-Thùy, Du’o’ng, Nguyễn-Văn, Hu’ó’ng, Nguyễn-Hải, Nam, Schimmelmann, Arndt

“…Thoron ( 220 Rn), an isotope of radon with a strong α-decay energy, and its short-lived metallic progeny can pose an elevated lung cancer hazard in room air…”
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A new organic reference material, l-glutamic acid, USGS41a, for δ13C and δ15N measurements − a replacement for USGS41 by Qi, Haiping, Coplen, Tyler B., Mroczkowski, Stanley J., Brand, Willi A., Brandes, Lauren, Geilmann, Heike, Schimmelmann, Arndt

“…Rationale The widely used l‐glutamic acid isotopic reference material USGS41, enriched in both 13C and 15N, is nearly exhausted. A new material, USGS41a, has…”
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A comparison of thermal maturity parameters between freely extracted hydrocarbons (Bitumen I) and a second extract (Bitumen II) from within the kerogen matrix of Permian and Triassic sedimentary rocks by Nabbefeld, Birgit, Grice, Kliti, Schimmelmann, Arndt, Summons, Roger E., Troitzsch, Ulrike, Twitchett, Richard J.

“…In this study we compared various maturity dependent aromatic, steroid and triterpenoid hydrocarbon ratios in bitumens that are freely extractable from…”
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Carbon isotopic fractionation of CH4 and CO2 during canister desorption of coal by STRAPOC, Dariusz, SCHIMMELMANN, Arndt, MASTALERZ, Maria

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