Mineralogical and chemical characterisation of coals from southern chile

INTERNATIONAL JOURNAL OF COAL GEOLOGY;
Int. J. Coal Geol.

dc.creatorAlfaro-Hanne, Guillermo
dc.creatorHelle-Jara, Sonia
dc.creatorKelm, Úrsula
dc.creatorTascon, J.
dc.date2017-04-27T18:51:31Z
dc.date2022-07-07T02:21:31Z
dc.date2017-04-27T18:51:31Z
dc.date2022-07-07T02:21:31Z
dc.date2000
dc.date.accessioned2023-08-22T23:37:02Z
dc.date.available2023-08-22T23:37:02Z
dc.identifier0
dc.identifierD98I1062
dc.identifierD98I1062
dc.identifierWOS:000087391300005
dc.identifier0166-5162
dc.identifierhttps://hdl.handle.net/10533/197403
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8351856
dc.descriptionTrace element contents (Cu, Zn, Co, Ni, Ct V, Ge, B, As), vitrinite reflectance values and content of mineral matter (low temperature ash (LTA) samples characterised by XRD) have been determined in Eocene-Miocene coals from Lebu (bituminous, Concepcion-Arauco basin), Pupunahue (subbituminous, central-southern Chile) and Pecket (subbituminous, Magellan Region). Trace element concentrations do not differ between the deposits and potential recovery of those from the ash, which does not appear to be of economic interest. Boron and sulphur contents point to a moderate marine influence during deposition. Arsenic and sulphur concentrations in subbituminous coals do not exceed the standards set by the Chilean legislation Sulphur concentrations in bituminous coal are high (> 3%) and they should be blended with low sulphur coals. In the Pupunahue deposit, Pearson's correlation between ash content and Cu (r = 0.42), Zn (r = 0.84), Co (r = 0.87), Ni (r = 0.32), Cr (r = 0.84), V (r = 0.80) and As (r = 0.09) shows an inorganic affinity and an organic affinity between ash content and Ge (r = -0.32), B (r = -0.4) and S (r = -077). The same correlation and affinity are observed in the Pecket mine for Cu (r = 0.50), Zn (r = 0.91), Co (r = 0.58), Ni (r = 0.71), Cr (r = 0.13), V(r = 0.22) and As (r = 0.24); Ge(r = -0.22), B (r = -0.97) and S (r = -0.13) also show an organic affinity. In Victoria de Lebu, the tendency is the same but the data are too reduced for a formal correlation. Mineral matter changes qualitatively and quantitatively in response to the local sediment input during coal formation. Quartz and pyrite dominate at Lebu (Ro = 0.70%), a basin isolated from volcanic emerged ranges to the east (Proto Andes Mountains). Pupunahue (Ro = 0.45%) received more pelitic (illite/muscovite) and volcanoclastic sediment, the latter altering to kaolinite. Coals from the Magellan region (Ro = 0.40%) contain kaolinite group minerals and smectite, similar to the accompanying "Tonstein" horizons. LTA residues show differences in the crystallinity of the kaolinite mineral, changing from a dominantly 1 T polytype at Pupunahue to I Md polytype at Pecket. (C) 2000 Elsevier Science B.V. All rights reserved.
dc.description0
dc.description9
dc.descriptionFONDEF
dc.description0
dc.description0
dc.description1
dc.descriptionFONDEF
dc.description44
dc.languageENG
dc.publisherELSEVIER SCIENCE BV
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinfo:eu-repo/grantAgreement/Fondef/D98I1062
dc.relationinfo:eu-repo/semantics/dataset/hdl.handle.net/10533/93477
dc.relationhttps://doi.org/10.1016/S0166-5162(99)00047-6
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleMineralogical and chemical characterisation of coals from southern chile
dc.titleINTERNATIONAL JOURNAL OF COAL GEOLOGY
dc.titleInt. J. Coal Geol.
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageAMSTERDAM


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