Lithium-Bearing Donbassite and Tosudite from Echassières, Massif Central, France

Cambridge University Press (CUP) - 1988
Thierry Merceron1, Atsuyuki Inoue2, A Bouchet2, Alain Meunier2
1Univ. Poitiers, Lab. Pet. Alterations Hydrothermales, Poitiers, France
2Université de Poitiers, U.A. 721 au C.N.R.S., Poitiers Cedex, France

Tóm tắt

AbstractLithium-bearing donbassite and tosudite were found in veins in hydrothermally altered granite (Beauvoir granite) in the northern part of the Massif Central, France. The two minerals are characterized by their high Li contents and low Mg and Fe contents; their structural formulae are: $${\left( {S{i_{3.81}}A{l_{0.19}}} \right)_{\Sigma = 4.00}}{O_{10}}{\left( {A{l_{3.81}}L{i_{0.52}}Fe_{0.01}^{2 + }C{a_{0.02}}M{g_{0.01}}} \right)_{\Sigma - 4.38}}{\left( {OH} \right)_8}{\left( {N{a_{0.07}}{K_{0.04}}} \right)_{\Sigma = 0.11}}$$ for donbassite and $${\left( {S{i_{3.50}}A{l_{0.50}}} \right)_{\Sigma = 4.00}}{O_{10}}{\left( {A{l_{2.95}}L{i_{0.22}}Fe_{0.01}^{3 + }T{i_{0.01}}} \right)_{\Sigma = 3.19}}{\left( {OH} \right)_5}{\left( {C{a_{0.01}}N{a_{0.15}}{K_{0.18}}} \right)_{\Sigma = 0.34}}$$ for tosudite.These chemical compositions indicate that the donbassite is an intermediate member of the donbassite-cookeite solid solution series and that the tosudite consists of interstratified Li-donbassite and beidellite. Both Li-bearing minerals show thermal behavior distinct from those previously reported for dioctahedral chlorite and tosudite.Petrographie investigation of drill cuttings from the Echassières area indicates that the two minerals were formed in an intermediate stage of hydrothermal alteration following an early stage characterized by formation of muscovite (2M1) at >350°C and before the latest stage characterized by deposition of kaolinite and randomly interstratified illite/smectite at < 100°C. Moreover, tosudite occurs in the upper part of the granite, whereas donbassite is restricted to the lower part, suggesting the formation of tosudite at lower temperatures.

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Tài liệu tham khảo

10.1007/BF01187144

10.1180/claymin.1984.019.2.11

Hayashi, 1967, Si-O absorption band near 1000 cm−1 and OH absorption bands of chlorite, Amer. Mineral, 52, 1206

Lazarenko, 1940, Donbassites, a new group of minerals from the Donetz basin, C.R. Acad. Sci. U.S.S.R., 28, 509

Aleksandrova, 1972, Structural features of dioctahedral one packet chlorite, Sov. Phys. Crystallogr., 17, 456

Hayashi, 1965, Relationship between infrared absorption spectra in the region of 450–900 cm−1 and chemical composition of chlorite, Amer. Mineral., 50, 476

10.1180/claymin.1983.018.2.12

Fransolet, 1978, Di/triocta-hedral chlorite in quartz veins from the Ardenne, Belgium, Can. Mineral., 16, 365

10.1346/CCMN.1982.0300111

Foord, 1986, Mineralogy and paragenesis of pocket clays and associated minerals in complex granitic pegmatites, San Diego County, California, Amer. Mineral., 71, 428

10.1346/CCMN.1969.0170306

10.1180/claymin.1974.010.3.01

10.1346/CCMN.1976.0240307

Newman, 1987, Chemistry of Clays and Clay Minerals, 1

10.1346/CCMN.1975.0230501

Sudo, 1966, Proc. Int. Clay Conf, Jerusalem, 1966, Vol. 1, 33

Schultz, 1963, Clay minerals in Triassic rocks of the Colorado Plateau, U.S. Geol. Surv. Bull., 1147–C, 71

Figueiredo Gomes, 1967, Alteration of spodumene and lepidolite with formation of dioctahedral chlorite plus dioctahedral chlorite-dioctahedral montmorillonite inter-stratifications, Mem. Notic. Mus. Mineral. Univ. Coimbra (Portugal), 64, 32

Van Oosterwyck-Gastuche, 1968, Sur l’existence d’une chlorite aluminifère au camp d’Atondo (Maniema, Rép. Dém. du Congo), Bull. Gp. Fr. Arg., 20, 187

Sudo, 1978, Clays and Clay Minerals of Japan, 1

Sudo, 1978, Clays and Clay Minerals of Japan

10.1038/173261b0

10.1007/BF00376638

Henmi, 1965, Dioctahedral chlorite (sudoite) from Itaya, Okayama Prefecture, Japan, Clay Sci., 2, 92

Dudoignon, 1984, La kaolinization de l’apex granitique d’Echassières: Un cas complexe de superposition d’altérations hydrothermales et météoriques, Coll. Nat. Programme Géologie Profonde de la France. Doc. BRGM, 81, 87

Cuney, M. , Autran, A. , Burnol, L. , Brouand, M. , Dudoignon, P. , Feybesse, L. , Gagny, C. , Jacquot, T. , Kosakevitch, A. , Martin, P. , Meunier, A. , Monier, G. and Tegyey, M. , 1986 Résultats préliminaires apportés par le sondage GPF sur la coupole de granite albitique à topaze-lépidolite de Beauvoir (Massif Central, France) C.R. Acad. Sci. Parisi 569 – 574.

10.1346/CCMN.1978.0260503

Bailey, 1980, Summary of recommendations of AI-PEA Nomenclature Committee, Can. Mineral., 18, 143

10.1016/0016-7037(78)90210-7

Reynolds, R. C. , 1985 Newmode, Computer Program for the Calculation of One-Dimensional Diffraction Patterns of Mixed-Layered Clays .

Fujii, 1971, Dioctahedral chlorite presumably originated from pyrophyllite, from the Shynio mine, Nagano Prefecture, central Japan, Soc. Mining Geologists Japan Spec. Issue, 2, 183

Černy, 1970, Compositional variations in cookeite, Can. Mineral., 10, 636

10.1180/claymin.1986.021.2.11

Hayashi, H. and Oinuma, K. , 1964 Aluminian chlorite from Kamikita mine, Japan Clay Sci. 1 22 – 30.

Turpault, 1986, Identification des minéraux d’altération et de leur distribution dans le sondage GPF 3 (Cézallier), Doc. BRGM, 105, 149

Loskutov, A. V. , 1959 Donbassite from Novaya Zemlya Miner. Postmagmat. Prots., Leningrad Univ. Sbornik 190 – 194.

10.1346/CCMN.1980.0280408

Matsuda, 1973, Hydrothermal behaviour of an interstratified mineral from the mine of Ebara, Hyogo Prefecture, Japan. (An example of changes from randomly interstratified clay mineral to regular one), J. Mineral. Soc. Japan, 11, 87

10.1007/978-3-642-65917-1_7

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