-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
DOI: 10.1016/j.chemgeo.2024.122439 Corpus ID: 273313886; Assessment of bi-metal paleo-redox proxies in the Bakken Formation black shales, Williston Basin, North Dakota, USA @article{Abdi2024AssessmentOB, title={Assessment of bi-metal paleo-redox proxies in the Bakken Formation black shales, Williston Basin, North Dakota, USA}, author={Zainab Abdi …
به خواندن ادامه دهید
The indirect detection of cryptotephra in black shales has become a key aspect of stratigraphic age, stratigraphic correlation, environmental variation, climate change, and organic matter enrichment in relation to volcanic eruptionsmon proxies for volcanic ash in sediments include the ratios of Hg to total organic carbon (TOC) and total sulfur (TS).
به خواندن ادامه دهید
Black shales that are deposited in oxygen-deficient environments are typically enriched in redox-sensitive elements, including sulphide-bound trace metals and elements that are involved in biological cycles (Georgiev et al., 2012). ... However, these proxies are often measured in sedimentary rock samples collected from outcrops that have been ...
به خواندن ادامه دهید
New paleoenvironmental proxies for the Irati black shales (Paraná Basin, Brazil) based on acidic NSO compounds revealed by ultra-high resolution mass spectrometry. Article. Jan 2021;
به خواندن ادامه دهید
The USM of Québec, Ontario, and New York is a nearly continuous belt of black shales that are well constrained in geological time, have undergone varying levels of diagenesis, and have a common provenance (Abanda and Hannigan, 2006).The USM has a broad geographical extent, extending throughout much of the north-eastern USA, southern Ontario, and southern …
به خواندن ادامه دهید
Variable local basin hydrography and productivity control the uranium isotope paleoredox proxy in anoxic black shales. Kimberly V. Lau, Leanne G. Hancock, Silke Severmann, Amy Kuzminov, Devon B. Cole, Richard J. Behl, Noah J. Planavsky, Timothy W ... Geochemical proxies—such as the isotopic compositions and abundances of redox-sensitive ...
به خواندن ادامه دهید
As there is often disagreement among geochemical paleo-redox proxies for black shales (Rimmer, 2004; Ocubalidet et al., 2018; Algeo and Liu, 2020), here we compare selected …
به خواندن ادامه دهید
Chemical and isotopic signatures for black shales serve as potential proxies for reconstruction of paleoenvironmental conditions. Here we bring Rock-Eval, major and trace element and Re-Os isotopic data together to …
به خواندن ادامه دهید
Sub-aerial weathering of black shales drives the gradual leaching of sulphur- and organic-bound heavy metal elements, which are usually abundant in these rocks due to depositional conditions. The formation of oxygen functional groups in kerogen, however, can lead to an opposing mechanism - metal adsorption and binding, similar to a process common in soils.
به خواندن ادامه دهید
Black shales consist of saponite or saponite-talc mixed layers, talc, lizardite, nontronite, and quartz. Green claystones are nontronite-rich but also contain lizardite, talc, and quartz.
به خواندن ادامه دهید
The Bakken black shales represent a unique sedimentary system characterized by high total organic carbon contents (TOC; Lower Bakken shale = 10.8 and Upper Bakken shale = 11.8 avg. wt%) and enrichment factors (EF) of various trace metals (TMs) such as Cu (6.2–7.7), Mo (219.7–237.8), Ni (9.4–10.2), U (20.6–29.3), V (9.9–14.2), and Zn ...
به خواندن ادامه دهید
In the past decade, various geochemical redox proxies have been used to associate black shale facies to deposition under anoxic waters with hydrogen sulfide present …
به خواندن ادامه دهید
Irati black shales and related oils are known for their content of acidic polar compounds, including phenols, carboxylic acids, ... It becomes obvious that selective NSO signals are good proxies of salinity variations and different organic matter, and that these interfering signals can be deciphered by a wide range of established and new NSO ...
به خواندن ادامه دهید
Phosphate deposition occurred mainly in suboxic bottom waters based on data for paleoredox proxies (Cr, V, Mo, Re) within contemporaneous black shales. Recent global reconstructions are consistent with Carboniferous upwelling in northern Alaska, but differ in the type of upwelling expected (zonal versus meridional).
به خواندن ادامه دهید
Black shales are of economic interest as they are potential source rocks and reservoir rocks hosting shale gas (Piper and Calvert, 2009; Zou et al., 2010).Primary productivity in surface water controls the production of organic matter, while an anoxic water-column favors the preservation of organic matter on the seafloor.
به خواندن ادامه دهید
The oldest black shales with depositional ages of 3.5–3.2 Ga occur in ancient cratons, such as the Pilbara in western Australia and the Kaapvaal in South Africa . The development of black shales after this time started to show a global distribution featured by high spatio-temporal continuity and diversity (Fig. 2) [6, 14–20].
به خواندن ادامه دهید
The elemental geochemistry of the shales contains crucial geological information about rock composition, weathering and transport processes, sedimentary environment, and diagenetic processes (Fralick and Kronberg, 1997).A crucial aspect of element-based provenance analysis is in evaluating the efficacy of employed proxies.
به خواندن ادامه دهید
These black shales showed discontinuous streaks of silt, and led to the term "silt-streaked black shales" when describing these rocks in drill core. ... Zr/Al) and redox proxies (Fe/Al, V/Cr) that highlight the distal and condensed nature of the basal Geneseo.
به خواندن ادامه دهید
In this Element, we propose a refinement of Mo geochemistry within aquatic systems, ancient rocks, and modern sediments through molecular geochemistry (systematically combining concentration, isotope ratio, elemental mapping, …
به خواندن ادامه دهید
Research on black shales oftentimes relies on the use of chemical indices that serve as proxies for the physical–chemical conditions of ancient bodies of water (e.g., [11,12,13]). Different chemical indices are used as proxies for different parameters, including redox conditions [ 14, 15, 16 ], salinity [ 17 ] and hydrographic conditions ...
به خواندن ادامه دهید
First, we identified and determined the acidic NSO composition of the Irati black shales and the overlying Serra Alta shales in detail by means of ESI(-) FT-ICR-MS. Second, we compared these data with established hydrocarbon proxies and their meaning about the depositional system (Martins et al., 2020a, b).
به خواندن ادامه دهید
Highly metalliferous black shales (HMBS) are enriched in organic carbon and a suite of metals, including Ni, Se, Mo, Ag, Au, Zn, Cu, Pb, V, As, Sb, Se, P, Cr, and U ± PGE, compared to common black shales, and are distributed at particular times through Earth history. They constitute an important future source of metals. HMBS are relatively thin units within …
به خواندن ادامه دهید
Organic matter (OM) accumulation in organic matter-rich mudstones, or black shales, is generally recognized to be controlled by combinations of bioproductivity, preservation, and dilution. However, specific triggers of OM deposition in these formations are commonly difficult to identify with geochemical proxies, in part because of feedbacks ...
به خواندن ادامه دهید
The Late Ordovician to early Silurian (O/S) was an important period in which many significant geological events occurred. During the O/S transition, organic-rich black shales were widely deposited and became important unconventional energy sources. Paleoproductivity, detrital input, and redox conditions are the three major factors controlling organic matter (OM) …
به خواندن ادامه دهید
Black shales have been of increasing interest in recent years due to their oil and gas potential, but also because many are enriched in nonfuel "unconventional" critical …
به خواندن ادامه دهید
The shift from uppermost Permian grey radiolarian cherts and grey shales to lowermost Triassic grey and black shales and fine‐grained dolomites is typical of deep‐water Panthalassic sediments.
به خواندن ادامه دهید
These values are similar to those obtained for other Devonian-Carboniferous black shales of eastern North America, e.g., 0.6–0.8 for the Oatka Creek Formation (Werne et al., 2002), 0.6–0.9 for the Clegg Creek Member of the New Albany Shale (Anderson et al., 1987; Beier and Hayes, 1989), and 0.88–0.97 for the Dunkirk-Hanover shales (Haddad ...
به خواندن ادامه دهید
Research on black shales oftentimes relies on the use of chemical indices that serve as proxies for the physical–chemical conditions of ancient bodies of water (e.g., [11–13]). Different chemical indices are used as proxies for different parameters, including redox
به خواندن ادامه دهید
Despite of numerous paleontologically- and geochemically-oriented studies employing a large number of proxies (e.g., redox-sensitive elements and isotopes of S, Mo, Se, U, Cr) in marine pyritic black shales, levels of O 2 in the Precambrian and Phanerozoic atmosphere remain an important issue to be solved (see Large et al., 2019 for a detailed ...
به خواندن ادامه دهید
Recently, Martins et al. (2021) determined the acidic NSO composition of the Irati black shales and the overlying Serra Alta shales, thereby proposed some new paleoenvironmental proxies based on ...
به خواندن ادامه دهید
New paleoenvironmental proxies for the Irati black shales (Paraná Basin, Brazil) based on acidic NSO compounds revealed by ultra-high resolution mass spectrometry Laercio L. Martinsa,b,*, Hans-Martin Schulza, Mareike Noaha, Stefanie Poetza, Hélio Jorge P. Severiano Ribeirob, Georgiana F. da Cruzb aGFZ German Research Centre for Geosciences ...
به خواندن ادامه دهید
The early Cambrian black shales enriched with U can serve as effective helium source rocks, ... over the redox state evolution of the early Cambrian oceans may be due to the differing responses of various redox proxies to environmental conditions. Some proxies can only trace information from localized water bodies, while others, although ...
به خواندن ادامه دهید
Through the variations and correlations analysis of the multi-source proxies in the Lower Permian Liangshan Fm. black shale, it is possible to distinguish between local and …
به خواندن ادامه دهید
Black Shales (Oxford University Press). View in Article Google Scholar [5] Zhang, X.-L. (2022). Marine refractory dissolved organic carbon and transgressive black shales. Chinese Science Bulletin 67: 1607−1613. DOI: 10.1360/TB-2021-0613. View in Article CrossRef Google Scholar. CITED BY ABOUT THIS ARTICLE ...
به خواندن ادامه دهید
A multi-source proxies approach to identifying local processes in lower Permian black shale impacting on the sedimentary environment of eastern Palaeo-Tethys Ocean ... The Liangshan Fm. black shales formed in littoral or neritic facies intermixed with paralic facies are likely to reflect regression and terrigenous input events as shown during ...
به خواندن ادامه دهید
ACCEPTED MANUSCRIPT 1 Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales Leszek Marynowski1*, Agnieszka Pisarzowska2, Arkadiusz Derkowski2, Michał Rakociński1, Rafał Szaniawski3, Jan Środoń2, Anthony S. Cohen4 1 Faculty of Earth Sciences, University of Silesia, Będzińska 60, 41-200 Sosnowiec, Poland
به خواندن ادامه دهید