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Title: Rare earth element geochemistry of outcrop and core samples from the Marcellus Shale

In this paper, we studied the geochemistry of the rare earth elements (REE) in eleven outcrop samples and six, depth-interval samples of a core from the Marcellus Shale. The REE are classically applied analytes for investigating depositional environments and inferring geochemical processes, making them of interest as potential, naturally occurring indicators of fluid sources as well as indicators of geochemical processes in solid waste disposal. However, little is known of the REE occurrence in the Marcellus Shale or its produced waters, and this study represents one of the first, thorough characterizations of the REE in the Marcellus Shale. In these samples, the abundance of REE and the fractionation of REE profiles were correlated with different mineral components of the shale. Namely, samples with a larger clay component were inferred to have higher absolute concentrations of REE but have less distinctive patterns. Conversely, samples with larger carbonate fractions exhibited a greater degree of fractionation, albeit with lower total abundance. Further study is necessary to determine release mechanisms, as well as REE fate-and-transport, however these results have implications for future brine and solid waste management applications.
 [1] ;  [2] ;  [3] ;  [2] ;  [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering; Center for Environmental Implications of Nanotechnology (CEINT), Durham, NC (United States)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Geochemical Transactions
Additional Journal Information:
Journal Volume: 16; Journal Issue: 1; Journal ID: ISSN 1467-4866
American Chemical Society, Geochemistry Div.
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
Sponsoring Org:
Country of Publication:
United States
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 58 GEOSCIENCES Marcellus Shale; rare earth elements; material characterization; ICP-MS; X-ray diffraction; Brine management; waste disposal