Monazite alteration mechanisms and depletion measurements in kaolins

Papoulis, Dimitrios; Tsolis-Katagas, P.; Katagas, C.

doi:10.1016/j.clay.2003.08.011

Cited by 35 publications

(18 citation statements)

References 27 publications

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“…Clay minerals are known to contain REEs (Roaldset, 1975;Henderson, 1984;Li et al, 2006) and act as new carriers of REEs in soil and weathering profiles (Condie et al, 1995;Öhlander et al, 1996;Gnandi and Tobschall, 2003;Papoulis et al, 2004;Galán et al, 2007). They thus partially control the REE stocks in soils (Bonnot- Courtois, 1981;Walter, 1991;Xing and Dudas, 1993;Ran and Liu, 1999).…”

Section: Clay Mineral Formationmentioning

confidence: 95%

“…Therefore, phosphate weathering is expected to release important REE quantities and, even small amounts of phosphates may largely influence the REE signature and budget of soils (Bonnot- Courtois, 1981;Papoulis et al, 2004;Galán et al, 2007). The REEs released when primary phosphates weather (allanite, monazite, apatite) then precipitate as immobile secondary REE-phosphates (florencite, rhabdophane, xenotime) (Jonasson et al, 1988;Banfield and Eggleton, 1989;Braun et al, 1993;Braun and Pagel, 1994), without formation of a Ce-anomaly (Braun et al, 1990;Taunton et al, 2000).…”

Section: Minerals With High Ree Concentrationsmentioning

confidence: 97%

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A review on the potentiality of Rare Earth Elements to trace pedogenetic processes

2009

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Section: Clay Mineral Formationmentioning

confidence: 95%

Section: Minerals With High Ree Concentrationsmentioning

confidence: 97%

A review on the potentiality of Rare Earth Elements to trace pedogenetic processes

2009

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“…[1][2][3][4][5] This compound is based on monazite, a natural light rare earth orthophosphate, which incorporates significant amounts of thorium and uranium. [6][7][8][9][10][11] This mineral is chemically durable, [12][13][14][15][16][17] and displays an interesting behavior under irradiation. [18][19][20][21] In order to evaluate the actual potential of this product, several programs dealing with synthesis, sintering, and leaching of monazite are presently in progress.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and sintering of a monazite–brabantite solid solution ceramics using metaphosphate

Glorieux

Montel²,

Matecki

2009

Journal of the European Ceramic Society

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“…14) indicates the destruction of light REE-bearing primary minerals (monazite ± apatite and feldspar), which is more easily achieved in high-temperature, acidic conditions (Wood and WilliamsJones, 1994;Monecke et al, 2003;Wood, 2003;Papoulis et al, 2004;Migdisov et al, 2009). Although highly speculative, the high-temperature (~300°−400°C), strongly light REE depleted alteration zones present at depth in the Lemoine footwall (Lemoine rhyolite) are consistent with alteration by reaction with acidic, CO2-rich and/or Cl-bearing solutions.…”

Section: Hydrothermal Architecture and Evolutionmentioning

confidence: 97%

The Lemoine Auriferous Volcanogenic Massive Sulfide Deposit, Chibougamau Camp, Abitibi Greenstone Belt, Quebec, Canada: Geology and Genesis

Mercier-Langevin¹,

Lafrance²,

Bécu³

et al. 2013

Economic Geology

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The Lemoine auriferous volcanogenic massive sulfide deposit (0.76 Mt at 4.6 g/t Au, 4.2 wt % Cu, and 9.5 wt % Zn) is part of the Chibougamau camp located in the northeastern part of the Abitibi greenstone belt. The deposit is hosted by a steeply dipping, S-facing homoclinal volcanic succession (~2729−2726 Ma Waconichi Formation, Lemoine Member) composed of effusive and intrusive tholeiitic rhyolites and andesites cut by comagmatic diorite and gabbro dikes and overlain by transitional to mildly calc-alkaline basalts, andesites, and rhyolites.Seven predominant synvolcanic alteration assemblages, now intensely deformed and metamorphosed to upper greenschist facies, were defined based on their mineralogy and position relative to ore. Albite-quartz, sericite-carbonate, sericite-chlorite, sericite-chlorite-(Zn), and chlorite-sericite-epidote-carbonate assemblages define semiconcordant zones that are stacked from the paleoseafloor to the deep footwall. In contrast, chlorite and chlorite-sericite-chloritoid assemblages overprint the other alteration zones and form subconcordant to now transposed discordant zones in the deposit footwall. Most alteration assemblages are characterized by relative SiO2, CaO, and Na2O mass losses and relative FeO, MgO, K2O, and CO2 mass gains. Whole-rock oxygen isotopes indicate that the temperatures of alteration ranged from ~100° to 150°C (sericite-carbonate assemblage) to ≥350°C (sericite-chlorite, chlorite-sericite-chloritoid, and chlorite assemblages). The chloritesericite-chloritoid assemblage, and to some extent the sericite-chlorite assemblage, are associated with strong to near total depletion of light rare earth elements possibly due to reaction with Cl-bearing, mildly acidic fluids at depth in the ore-forming hydrothermal system.The sulfide lens was formed in part on the seafloor and in part by subseafloor replacement. The massive sulfides are particularly rich in Bi, suggesting a possible magmatic input into the Lemoine ore-forming hydrothermal system. High Bi concentrations in the mineralizing system are likely to have enhanced Au precipitation by scavenging the precious metal from the hydrothermal fluids. The Au-rich nature of the Lemoine auriferous volcanogenic massive sulfide deposit can be explained by a combination of very efficient metal transport, highly effective capture of metals at or near the seafloor, and a possible magmatic contribution to the hydrothermal

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Monazite alteration mechanisms and depletion measurements in kaolins

Cited by 35 publications

References 27 publications

A review on the potentiality of Rare Earth Elements to trace pedogenetic processes

A review on the potentiality of Rare Earth Elements to trace pedogenetic processes

Synthesis and sintering of a monazite–brabantite solid solution ceramics using metaphosphate

The Lemoine Auriferous Volcanogenic Massive Sulfide Deposit, Chibougamau Camp, Abitibi Greenstone Belt, Quebec, Canada: Geology and Genesis

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