Geochemical and multi-isotopic (87Sr/86Sr, 143Nd/144Nd, 238U/235U) perspectives of sediment sources, depositional conditions, and diagenesis of the Marcellus Shale, Appalachian Basin, USA

Phan, Thai T.; Gardiner, James; Capo, Rosemary C.; Stewart, Brian W.

doi:10.1016/j.gca.2017.10.021

Cited by 41 publications

(32 citation statements)

References 100 publications

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“…In the natural environment, the ratio 238 U/ 235 U ratio can vary by up to ca. 5% (Uvarova et al, 2014;Brennecka et al, 2010;Placzek et al, 2016;Phan et al, 2018;Brennecka et al, 2018). This however is consistent enough to assume it is constant within measurement accuracy and precision.…”

Section: α β and Decay Pairs Detectionmentioning

confidence: 61%

μDose: A compact system for environmental radioactivity and dose rate measurement

Tudyka

Miłosz

Adamiec

et al. 2018

Radiation Measurements

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µDose is a novel compact analytical instrument for assessing low level 238 U, 235 U, 232 Th decay chains and 40 K radioactivity. The system is equipped with a dual α/β scintillator allowing discrimination between α and β particles. The unique built-in pulse analyzer measures the amplitude of each individual pulse, its shape and the time interval between subsequent pulses. This allows the detection of pulse pairs arising from subsequent decays of 214 Bi/ 214 Po, 220 Rn/ 216 Po, 212 Bi/ 212 Po and 219 Rn/ 215 Po. The obtained α and β counts and four separate decay pair counts are used to calculate 238 U, 235 U, 232 Th and 40 K specific activities in measured samples through the use of radioactivity standards. The µDose system may be equipped with various photomultipliers and counting containers to assess radionuclide concentrations of samples of masses ranging between 0.4 g and 4 g. As a result, the user can customize the system to their needs and maximize the instrument's performance. The system is controlled by dedicated software with a graphical user interface and modules for system calibration, data visualization, specific radioactivity calculations and dose rate determination using the infinite matrix assumption.

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Section: α β and Decay Pairs Detectionmentioning

confidence: 61%

μDose: A compact system for environmental radioactivity and dose rate measurement

Tudyka

Miłosz

Adamiec

et al. 2018

Radiation Measurements

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“…Sediment transport through "fairway" mixed sediment from various sources, causing the observed DM and εNd signatures of the Marcellus Shale ( Fig. 27 and 28; Bock et al, 1998, Chakrabarti et al, 2007, Caesar et al, 2010, Phan et al, 2018, and Hupp and Weislogel, 2018. A study of Marcellus Sm-Nd by Caesar et al (2010) was carried out near the Catskill Delta outside of this fairway, which could explain why its signatures were dominated by younger DM ages and more immature εNd signatures consistent with influx from mainly eroded Grenville rocks.…”

Section: Sediment Transport Pathwaymentioning

confidence: 96%

“…A horizontal Armstrong well has produced 0.45 BCF/1000ft lateral (WVDEP, 2019) so far and a nearby horizontal CSA well totaling 0.41 BCF/1000ft lateral (PADEP, 2019). Results from provenance analysis of these cores are compared to five other locations in the region to constrain regional detrital sediment input and its relationship to spatial and temporal patterns of organic matter deposition (Caesar et al, 2010;Hupp, 2017;Phan et al, 2018). Furthermore, this study assesses the impact of thermal maturity on the organic-rich facies as part of the comparison (Fig.…”

Section: Controls On Marcellus Shale Tocmentioning

confidence: 99%

“…% TOC versus εNd. Monongalia County data fromHupp (2017), Greene and Tioga County fromPhan et al (2018), and Taylor and Clearfield County data from this study.…”

mentioning

confidence: 91%

“…studies infer variable sediment sources for the Marcellus Shale.RecentlyPhan et al (2018) found depleted mantle model age ( DM) values of 1.38-1.61 Ga and εNd -10 to -12 from core chips of the Oatka Creek member and the lower Mahantango Formation from both Greene County, Pennsylvania and Tioga County, New York, and interpreted the Acadian Fold-Thrust Belt as the source Hupp and Weislogel (2018). tested Sm-Nd of core from the Hamilton Group from the MSEEL and WV-6 core recovered near Morgantown, West Virginia.…”

mentioning

confidence: 99%

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Sediment Provenance Study of the Lower Hamilton Group: An Analysis of the Organic-Rich Facies and its Depositional History

Fritz¹

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Currently, insufficient geological models exist to explain the variability and distribution of TOC in the Marcellus Shale, within the Hamilton Group. TOC is one of the several limiting factors for natural gas production within the Marcellus Shale basin. One possible explanation for the low TOC regions is that detrital dilution was variable across the basin, with different sediment sources contributing detritus to low TOC areas, compared to surrounding regions with higher TOC. This hypothesis is tested by analyzing the source composition of inorganic detritus, using elemental and mineralogical proxies, with two cores in the Hamilton Group. The Armstrong #1 core is located in Taylor County, West Virginia and the Coldstream Affiliates 1MH (CSA) core is located in Clearfield County, Pennsylvania. Both these wells are located outside of the higher productivity regions with a nearby horizontal Armstrong well totaling 0.45 BCF/1000ft lateral and a nearby horizontal CSA well totaling 0.41 BCF/1000ft lateral. Variation in production may also result from over maturation of the kerogen-hosted pores. To evaluate the influence of thermal history, the thermal maturity of the Marcellus Shale in the lower productivity Armstrong #1 and CSA wells and the higher productivity MSEEL well was assessed using Raman spectroscopy. Major element, trace element, and REE geochemistry indicate the sediment source area was composed of intermediate and felsic granitic and recycled sedimentary lithologies. Samarium-neodymium isotopic analysis reveals a range of DM ages and εNd values. The Armstrong #1 well DM / εNd ranged from 1.64 to 1.91 Ga /-11.93 to-9.56 and the CSA from 1.62 to 1.88 Ga /-12.07 to-11.12. The εNd values became more negative upsection, however the DM did not display a consistent trend relative to depth. Provenance analysis indicates the most likely source of clastic sediment was the Acadian Fold-Thrust Belt to the east with minor inputs from Superior Craton and southern Canadian Grenville Province. Ultimately, results conclude that elevated TOC was associated with only older DM ages and recycled sedimentary signatures. iii TABLE OF CONTENTS

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Radioactivity

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Geochemical and multi-isotopic (87Sr/86Sr, 143Nd/144Nd, 238U/235U) perspectives of sediment sources, depositional conditions, and diagenesis of the Marcellus Shale, Appalachian Basin, USA

Cited by 41 publications

References 100 publications

μDose: A compact system for environmental radioactivity and dose rate measurement

μDose: A compact system for environmental radioactivity and dose rate measurement

Sediment Provenance Study of the Lower Hamilton Group: An Analysis of the Organic-Rich Facies and its Depositional History

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