Trace elements distribution and mineralogical composition in the <2-µm size fraction of shales from the Southern Apennines, Italy

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Authors:Mongelli, G.
Author Affiliations:Primary:
Univ. Studi Basilicata, DiSGG, Potenza, Italy
Volume Title:Mineralogy and Petrology
Source:Mineralogy and Petrology, 53(1-3), p.103-114. Publisher: Springer-Verlag, Vienna, Austria. ISSN: 0930-0708
Publication Date:1995
Note:In English with German summary. 42 refs.; illus., incl. 3 tables, 18 anals.
Summary:The clay mineral assemblage consists of illite and smectite (detrital micaceous precursor), kaolinite and minor chlorite. Chemical data, normalized with respect to the post-Archean Australian shales, indicate depletion of Ba, Rb, Y, Zr and enrichment of Nb. REE-patterns exhibit a positive Eu anomaly and HREE depletion. A kaolinite-rich sample has high ΣREE contents in contrast to smectite-rich fractions. Illite-rich samples do not show Eu anomalies. Statistical data processing indicates a link between Ti, P, Y, Zr, Nb and Yb, suggesting that accessory phases may play a role in controlling HREE and that the observed LREE/HREE fraction may also be due to hydraulic sorting of these phases. A La-kaolinite relationship accounts for the capability to host LREE. The Eu anomaly is a source inherited feature, probably not determined solely by clay minerals. [H.E.]
Subjects:Cenozoic; Chlorite; Chlorite group; Clastic rocks; Clay mineralogy; Clay minerals; Correlation coefficient; Cretaceous; Factor analysis; Fines; Illite; Kaolinite; Major elements; Mesozoic; Metals; Mineral composition; Modal analysis; Rare earths; Regression analysis; Sedimentary rocks; Shale; Sheet silicates; Silicates; Smectite; Statistical analysis; Tertiary; Trace elements; Upper Cretaceous; Apennines; Campania Italy; Europe; Italy; Southern Apennines; Southern Europe
Abstract Numbers:95M/4501
Record ID:1999010625
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe
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008 190110s1995 au a 0 0 eng d
040 |a ViAlAGI  |c ViAlAGI 
041 |a eng  |b ger 
072 7 |a 02C  |2 georeft 
072 7 |a 06A  |2 georeft 
100 1 |a Mongelli, G.  |e analytic author  |u Univ. Studi Basilicata, DiSGG, Potenza 
245 1 0 |a Trace elements distribution and mineralogical composition in the #LT2-µm size fraction of shales from the Southern Apennines, Italy 
300 |a p. 103-114 
500 |a In English with German summary. 42 refs. 
500 |a Abstract number: 95M/4501 
500 |a Abstractor: H.E. 
500 |a Affiliation: Univ. Studi Basilicata, DiSGG; Potenza; ITA; Italy 
500 |a Key title: Mineralogy and Petrology 
500 |a Source note: Mineralogy and Petrology, 53(1-3), p.103-114. Publisher: Springer-Verlag, Vienna, Austria. ISSN: 0930-0708 
500 |a Publication type: journal article 
504 |b 42 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe 
520 |a The clay mineral assemblage consists of illite and smectite (detrital micaceous precursor), kaolinite and minor chlorite. Chemical data, normalized with respect to the post-Archean Australian shales, indicate depletion of Ba, Rb, Y, Zr and enrichment of Nb. REE-patterns exhibit a positive Eu anomaly and HREE depletion. A kaolinite-rich sample has high ΣREE contents in contrast to smectite-rich fractions. Illite-rich samples do not show Eu anomalies. Statistical data processing indicates a link between Ti, P, Y, Zr, Nb and Yb, suggesting that accessory phases may play a role in controlling HREE and that the observed LREE/HREE fraction may also be due to hydraulic sorting of these phases. A La-kaolinite relationship accounts for the capability to host LREE. The Eu anomaly is a source inherited feature, probably not determined solely by clay minerals. 
650 7 |a Cenozoic  |2 georeft 
650 7 |a Chlorite  |2 georeft 
650 7 |a Chlorite group  |2 georeft 
650 7 |a Clastic rocks  |2 georeft 
650 7 |a Clay mineralogy  |2 georeft 
650 7 |a Clay minerals  |2 georeft 
650 7 |a Correlation coefficient  |2 georeft 
650 7 |a Cretaceous  |2 georeft 
650 7 |a Factor analysis  |2 georeft 
650 7 |a Fines  |2 georeft 
650 7 |a Illite  |2 georeft 
650 7 |a Kaolinite  |2 georeft 
650 7 |a Major elements  |2 georeft 
650 7 |a Mesozoic  |2 georeft 
650 7 |a Metals  |2 georeft 
650 7 |a Mineral composition  |2 georeft 
650 7 |a Modal analysis  |2 georeft 
650 7 |a Rare earths  |2 georeft 
650 7 |a Regression analysis  |2 georeft 
650 7 |a Sedimentary rocks  |2 georeft 
650 7 |a Shale  |2 georeft 
650 7 |a Sheet silicates  |2 georeft 
650 7 |a Silicates  |2 georeft 
650 7 |a Smectite  |2 georeft 
650 7 |a Statistical analysis  |2 georeft 
650 7 |a Tertiary  |2 georeft 
650 7 |a Trace elements  |2 georeft 
650 7 |a Upper Cretaceous  |2 georeft 
651 7 |a Apennines  |2 georeft 
651 7 |a Campania Italy  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Italy  |2 georeft 
651 7 |a Southern Apennines  |2 georeft 
651 7 |a Southern Europe  |2 georeft 
773 0 |t Mineralogy and Petrology  |d Vienna : Springer-Verlag, 1995  |x 0930-0708  |y MIPEE9  |n Mineralogy and Petrology, 53(1-3), p.103-114. Publisher: Springer-Verlag, Vienna, Austria. ISSN: 0930-0708 Publication type: journal article  |g Vol. 53, no. 1-3  |h illus., incl. 3 tables, 18 anals.