Geological Controls on Geochemical Anomaly of the Carbonaceous Mudstones in Xian’an Coalfield, Guangxi Province, China

نویسندگان

چکیده

The anomalous enrichment of the rare earth elements and yttrium (REY), U, Mo, As, Se, V in coal-bearing intervals intercalated within carbonate successions South China has attracted much attention due to highly promising recovery potential for these elements. This study investigates mineralogical geochemical characteristics late Permian (layers A–F) marine strata Xian’an Coalfield Guangxi Province elucidate mode occurrence process elevated There are two assemblages, including quartz-albite-kaolinite-carbonates assemblage layers D–F quartz-illite-kaolinite-carbonates A–C. Compared upper continental crust composition (UCC), REY, predominantly enriched A B, which layer displays REY–V–Se–As while B shows Mo–U–V assemblage. REY contents primarily hosted by clay minerals, zircon, monazite; show organic association; As Se display Fe-sulfide association. Three geological factors most likely responsible anomaly: (1) more intensive seawater invasion gives rise higher sulfur, Co, Ni, contents, as well Sr/Ba ratio A–C than D–F; (2) both input alkaline pyroclastic materials solution/rock interaction jointly govern REY; (3) influx syngenetic or early diagenetic hydrothermal fluids is predominant source V, As.

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ژورنال

عنوان ژورنال: Energies

سال: 2022

ISSN: ['1996-1073']

DOI: https://doi.org/10.3390/en15145196