Authigenic Apatite in a Fluvial Sandstone Sequence: Evidence for Rare-Earth Element Mobility During Diagenesis and a Tool for Diagenetic Correlation

Bouch, Jon E.; Hole, Malcolm; Trewin, Nigel H.; Chenery, Simon; Morton, Andrew

doi:10.1306/040301720059

Cited by 34 publications

(18 citation statements)

References 23 publications

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“…not alter isochrons systematically. Apatite does, however, have a great affinity for REE, and REE are effectively scavenged from pore waters during authigenic apatite growth (e.g., Valsami-Jones et al, 1998;Lev et al, 1999;Bouch et al, 2002;Trueman and Tuross, 2002;Tó th et al, 2010), hence continued addition of Lu is proposed as the most likely cause of the false ages.…”

Section: Assessing Late Trace Element Exchangementioning

confidence: 99%

Protracted diagenetic alteration of REE contents in fossil bioapatites: Direct evidence from Lu–Hf isotope systematics

Kocsis

Trueman

Palmer

2010

Geochimica et Cosmochimica Acta

102

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Section: Assessing Late Trace Element Exchangementioning

confidence: 99%

Protracted diagenetic alteration of REE contents in fossil bioapatites: Direct evidence from Lu–Hf isotope systematics

Kocsis

Trueman

Palmer

2010

Geochimica et Cosmochimica Acta

102

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“…Note that presence of monazite in hydrothermaly altered basalt was reported by other workers (Noda and Kakegawa, 2001). For apatite 5.14, the REE pattern normalized by silica dike is comparable to a shale-normalized REE pattern of sedimentary apatites (Lev et al, 1999;Bouch et al, 2002). This suggests deposition of apatite 5.14 from hydrothermal or diagenetic fluid that have REE compositions similar to those of silica dike.…”

Section: Origin Of Apatitementioning

confidence: 61%

“…This suggests deposition of apatite 5.14 from hydrothermal or diagenetic fluid that have REE compositions similar to those of silica dike. For apatite 5.4.2, the REE pattern normalized by silica dike is difficult to be explained by shale-normalized REE patterns of sedimentary apatites (Lev et al, 1999;Bouch et al, 2002), since the Gd/La ratio of 40 ± 12 (normalized by silica dike) of apatite 5.4.2 can not explained by Gd/La ratios of 2~7 (normalized by shale) of the sedimentary apatites. This requires that REE compositions of a fluid which deposited apatite 5.4.2 is different from those of fluids which deposited apatite 5.14 and apatite 3.5.5, 5.5 and 5.8.…”

Section: Origin Of Apatitementioning

confidence: 95%

Ion microprobe U-Pb dating and REE analysis of apatite from kerogen-rich silica dike from North Pole area, Pilbara Craton, Western Australia

Nishizawa¹,

Terada²,

Ueno³

et al. 2004

Geochem. J.

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In order to provide a time constraint on the 13 C-depleted kerogen formation in silica dikes that intruded 3.5 Ga greenstone from Pilbara Craton in Western Australia, we have carried out an ion microprobe U-Pb dating and rare earth element (REE) analysis of apatite from one of the dikes. Two types of apatite were identified in the dike, based on their occurrences. One is stick-shape apatites (Type 1 apatite) in secondary silica micro-veins that cut the silica dike. The other is granular apatites (Type 2 apatite) that occur in matrix of the silica dike. Occurrence in the secondary micro-veins (Type 1), non-igneous REE patterns (Type 1 and 2), chemical zoning (some of Type 1 and 2), iron sulfide within apatite (some of Type 2), and intergrowth of apatite and sulfide (some of Type 2) suggest that both types of apatite were crystallized in the silica dike. Ion microprobe U-Pb dating of Type 1 apatite did not give a well-constrained age, while Type 2 apatite yields a Tera-Wasserburg concordia intercept age of 3214 ± 140 Ma (95% confidence level, MSWD = 0.6) in a three-dimensional 238 Pb isochron age of 3191 ± 150 Ma (95% confidence level, MSWD = 0.5). It is difficult to judge whether the U-Pb and Pb-Pb age of Type 2 apatite is crystallization age or metamorphic age, since the estimated range of closure temperature of U-Pb system in the apatite and that of metamorphic temperature is partly overlapped. In either case, it can be safely concluded that the minimum age of the dike and kerogen is 3.2 Ga. These ages might allow the interpretation that the kerogen was produced by biological carbon fixation and/or abiological reaction at least before 3.2 Ga.

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“…Although or ganic mat ter and sulphides are not ef fec tive con centra tors of REE, they may ac cu mu late more (M + H)REE than LREE (Jiang et al, 2006;Zanin et al, 2010). Lo cally en countered rocks of the Kupferschiefer se ries en riched in P 2 O 5 or con tain ing phos phate min er als (e.g., Kucha, 1982;Mayer and Piestrzyñski, 1986;Hartmann et al, 1997;Michalik, 2001;Saw³owicz, 2013) sug gest the pos si bil ity of REE lib er a tion from phos phates which are com monly en riched in MREE (e.g., Hannigan and Sholkovitz, 2001;Shields and Stille, 2001;Bouch et al, 2002).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

“…Mod ern sed i ments de pos ited un der re duc ing con di tions are char ac ter ized mostly by rel a tively flat REE pat terns, with a slight HREE en rich ment (de Baar et al, 1988;Piper and Bau, 2013). How ever, the ul timate REE dis tri bu tion in sed i ments is com monly gov erned by diagenetic pro cesses (Schieber, 1988;Milodowski and Zalasiewicz, 1991;Shields and Stille, 2001;Bouch et al, 2002) or in terac tion of sed i ments with mi grat ing flu ids, which tends to increase REE con tents and con cen trate pref er en tially the mid dle REE (de Baar et al, 1988;Gieré, 1996;Zwingmann et al, 1999;Wood, 2003). Be cause of this, REE dis tri bu tion di a grams for var i ous kinds of black shales can ex hibit high vari abil ity where met al lif er ous black shales are usu ally more strongly en riched in REE than typ i cal black shales (Ta ble 1; Huyck, 1989;Jiang et al, 2006).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Controls on the distribution of rare earth elements in the Kupferschiefer series of SW Poland

Oszczepalski¹,

Chmielewski²,

Mikulski³

2016

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1 Pol ish Geo log i cal In sti tute -Na tional Re search In sti tute, Rakowiecka 4, 00-975 Warszawa, Po land Oszczepalski, S., Chmielewski, A., Mikulski, S.Z., 2016. Con trols on the dis tri bu tion of rare earth el e ments in the Kupferschiefer se ries of SW Po land. Geo log i cal Quar terly, 60 (4): 811-826, doi: 10.7306/gq.1325 This study deals with the spa tial dis tri bu tion and the PAAS-nor mal ized pat terns of rare earth el e ments (REE) stud ied by ICP-MS in the Kupferschiefer se ries of SW Po land. The most char ac ter is tic fea ture is a pro gres sive en rich ment in REE content (in clud ing Y and Sc) out ward from the rocks with py ritic and Pb-Zn min er al isa tion, across the rocks with cop per min er alisa tion, to wards the ox i dized (Rote Fäule) ar eas. The same trend can also be ob served with re spect to LREE, MREE and HREE. Whereas REE dis tri bu tion di a grams for shales with py rite and Pb-Zn min er al isa tion are al most flat, di a grams for shales with he ma tite and cop per min er al isa tion are con vex-up ward and the stron gest con vex ity is at trib uted to the tran si tion from hematitic al ter ation to cop per-rich rocks. REE dis tri bu tion di a grams nor mal ized to PAAS show strong MREE en richment rel a tive to LREE and HREE, which is typ i cally the high est in the he ma tite zone, lower in shale with cop per min er al isation, and the low est in shales with Pb-Zn and py rite min er al isa tion. The sys tem atic in crease in the con cen tra tion of REE to wards the Rote Fäule, and the strong en rich ment in MREE in the tran si tion zone are in dic a tive of vari able in ten sity of leaching and for ma tion of the REE en rich ments (in clud ing MREE) by MREE>HREE>LREE flu ids, as ev i denced by the MREE-enriched sig na tures. Over print ing of sec ond ary en rich ments over the orig i nal REE pat tern due to re dis tri bu tion along the path ways of ex pand ing flu ids are pos tu lated to ac count for the ap par ent dif fer ences in the dis tri bu tion and con cen tra tion of REE (in clud ing the MREE-en riched trend) be tween the ox i dized rocks, cop per-bear ing rocks, and re duced lithologies bar ren in cop per.

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Authigenic Apatite in a Fluvial Sandstone Sequence: Evidence for Rare-Earth Element Mobility During Diagenesis and a Tool for Diagenetic Correlation

Cited by 34 publications

References 23 publications

Protracted diagenetic alteration of REE contents in fossil bioapatites: Direct evidence from Lu–Hf isotope systematics

Protracted diagenetic alteration of REE contents in fossil bioapatites: Direct evidence from Lu–Hf isotope systematics

Ion microprobe U-Pb dating and REE analysis of apatite from kerogen-rich silica dike from North Pole area, Pilbara Craton, Western Australia

Controls on the distribution of rare earth elements in the Kupferschiefer series of SW Poland

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