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Petrology and age determinations of the ultramafic (lamproitic) rocks from the Yakokut complex, Aldan Shield, Eastern Siberia

Published online by Cambridge University Press:  05 July 2018

U. Mues-Schumacher ,
J. Keller ,
V. Konova  and
P. Suddaby
U. Mues-Schumacher
Affiliation:
Min.-Pet. Institut, Albertstr. 23b, 79104 Freiburg, Germany
J. Keller
Affiliation:
Min.-Pet. Institut, Albertstr. 23b, 79104 Freiburg, Germany
V. Konova
Affiliation:
IGEM, Staromonetny 35, 109017 Moscow, Russia
P. Suddaby
Affiliation:
Dep. of Geology, Imperial College, Prince Consort Road, SW7 2BP, UK
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Abstract

Mineralogical, geochemical and isotopic data including K-Ar age determinations are presented for one of the largely unknown, Mesozoic ultramafic (lamproitic) occurrences of the Aldan Shield. Ultramafic, ultrapotassic rocks occur as isolated pipes or as dykes in alkaline complexes as the Yakokut complex. K-Ar dating of phlogopites from different ultramafic dyke rocks of Yakokut give cooling ages of 133.3 ± 1.3 Ma. These rocks generally contain olivine, clinopyroxene, phlogopite and spinel phenocrysts. Olivines are forsterite-rich (Fo86–94) and undeformed, suggesting that they are phenocrysts. The low Ti and Al contents of clinopyroxenes are close to those of lamproites. Phlogopite cores are rich in Al2O3 and TiO2 relative to the rims with two different zonation trends caused by distinct crystallization conditions after emplacement. Spinels are Ti-bearing magnetites and Ti-Al-magnesiochromites with high Cr/(Cr+Al) ratios (> 0.9), indicating their crystallization from a lamproitic melt.

Geochemically, the rocks are ultrabasic — basic with high mg# values, low Ca, Al, Na and strong enrichments of Rb, Ba and K. Their CaO/Al2O3, Zr/Nb or Ba/Sr ratios indicate their lamproitic nature and origin in the subcontinental lithosphere of a depleted mantle source which had undergone metasomatic enrichment. As the rocks all show strong negative Nb anomalies and low Ti, Y and Yb contents, the enrichment is attributed to subduction zone fluids. The Sr-Nd-data (87Sr/86Sr0 0.70573−0.70605 ± 0.00003; ɛNd − 10.2 ± 0.7) indicate the origin by partial melting of a heterogeneous mantle source with relatively low Rb/Sr ratios and an early enrichment. The evolution model comprises a depletion of ‘basaltic elements’, leading to a harzburgitic source which was enriched by an early LREE contribution during the stabilization of the Archaean to Proterozoic Aldan Shield. It is further suggested that the Mesozoic northwesterly directed subduction of the Ochotsk-Chukotsk belt influenced the subcontinental lithosphere underneath the Aldan Shield, leading to the observed subduction-related signature of the Yakokut lamproites.

Keywords

ultramafic rockslamproitegeochemistryisotope dataAldan ShieldYakokut complexSiberia
Type
Petrology
Information
Mineralogical Magazine , Volume 59 , Issue 396 , September 1995 , pp. 409 - 428
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1995

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Footnotes

*

Present address: Wolfer & Goebel UTS, Presselstr. 16, D-70191 Stuttgart, Germany

References

Arima, M. and Edgar, A.D. (1981) Substitution mechanisms and solubility of titanium in phlogopites from rocks of probable mantle origin. Contrib. Mineral. Petrol., 77, 288–95.CrossRefGoogle Scholar
Arima, M. and Edgar, A.D. (1983) A high pressure experimental study on a magnesium-rich leucite-lamproite from the West Kimberley area, Australia: Petrogenetic implications. Contrib. Mineral. Petrol., 8, 228–34.CrossRefGoogle Scholar
Atkinson, W.J., Smith, C.B. and Boxer, G.L. (1984) The discovery and geology of the Argyle diamond deposits, Kimberley, Western Australia. Australas Inst. Mining Metali, Darwin Conf. 1984, 141-9.Google Scholar
Baldridge, W.S., Carmichael, I.S.E. and Albee, A.L. (1981) Crystallization paths of leucite-bearing lavas: Examples from Italy. Contrib. Mineral. Petrol., 76, 321–35.CrossRefGoogle Scholar
Barton, M. (1979) A comparative study of some minerals occurring in the potassium-rich alkaline rocks of the Leucite Hills, Wyoming, the Vico volcano, western Italy, and the Toro Ankole region, Uganda. Neues Jahrb. Mineral. Abh., 137, 113–34.Google Scholar
Bergman, S.C. (1987) Lamproites and other potassium-rich igneous rocks: a review of their occurrence, mineralogy and geochemistry. In: Fitton, J.G and Upton, B.G.J. (eds), Alkaline Igneous Rocks, Geol. Soc. Spec. Publ. 30, 103–90.Google Scholar
Bilanenko, V.A., Spector, V.B. and Parfyonov, L.M. (1984) Geological outline of the Yakutsk ASSR. In: Yakutsk ASSR Siberian Platform, Guidebook of Geol. Conventus in Moscow 1984, 136–51.Google Scholar
Bilibin, J.A. (1961) Late Jurassic intrusions of the Central Aldan. Moscow: 161 pp. (in Russian).Google Scholar
Bogatikov, V.A., Machotkin, I.L. and Kononova, V.A. (1985) Lamproites and their place in the systematics of high magnesium potassic rocks. Izv. Akad. Nauk SSSR, 12, 3–10 (in Russian).Google Scholar
Bogatikov, V.A., Kononova, V.A., Machotkin, I.L., Eremeyev, N.V., Savosin, S.I., Kerzin, A.L., Malov, Y. and Tsepin, A.I. (1987) Rare earth and rare elements as indicators of the origin of lamproites of the Central Aldan (USSR). Vulkanol. Seismol., 1, 15–29. (in Russian).Google Scholar
Carswell, D.A. (1980) Mantle derived lherzolite nodules associated with kimberlite, carbonatite and basalt magmatism: a review. Lithos, 13, 121–38.CrossRefGoogle Scholar
Cundari, A. (1975) Mineral chemistry and petrogenetic aspects of the Vico lavas, Roman volcanic region, Italy. Contrib. Mineral. Petrol., 53, 129–44.CrossRefGoogle Scholar
Cundari, A. (1979) Petrogenesis of the leucite-bearing lavas in the Roman region, Italy: The Sabatini lavas. Contrib. Mineral. Petrol., 70, 9–21.CrossRefGoogle Scholar
Edgar, A.D. (1987) The genesis of alkaline magmas with emphasis on their source regions: inferences from experimental studies. In: Fitton and Upton (1987) 29–52.Google Scholar
Edgar, A.D. (1989) Barium-and strontium-enriched apatites in lamproites from West Kimberley, Western Australia. Amer. Mineral., 74, 889–95.Google Scholar
Edgar, A.D. and Charbonneau, H.E. (1991) Fluorine-bearing phases in lamproites. Mineral. Petrol, 44, 125–49.CrossRefGoogle Scholar
Edgar, A.D. and Vukadinovic, D. (1993) Implications of experimental petrology to the evolution of ultra-potassic rocks. Lithos, 28, 205–20.CrossRefGoogle Scholar
Edgar, A.D., Lloyd, F.E. and Vukadinovic, D. (1994) The role of fluorine in the evolution of the ultrapotassic magmas. Mineral. Petrol., 51, 173–93.CrossRefGoogle Scholar
Farmer, G.L. and Boettcher, A.L. (1981) Petrologic and crystal-chemical significance of some deep-seated phlogopites. Amer. Mineral., 66, 1154–63.Google Scholar
Flisch, M. (1982) Potassium-argon analyses. In: Numerical stratigraphy, Odin, G.S. (ed.), John Wiley, Chichester 151-8.Google Scholar
Flisch, M. (1986) K-Ar dating of quartenary samples. In: Dating young sediments, Hurford, A., Jager, E. and Ten Cate, J.A.M. (eds.). CCOP technical secretariat, Bankok, Thailand 299-323.Google Scholar
Foley, S.F. (1990) Experimental constraints on phlogo-pite chemistry in lamproites: 2. Effect of pressure-temperature variations. Eur. J. Mineral., 2, 327–41.CrossRefGoogle Scholar
Foley, S.F., Venturelli, G., Green, D.H. and Toscani, L. (1987) The ultrapotassic rocks: characteristics, classification, and constraints for petrogenetic models. Earth Sci. Rev., 24, 81–134.CrossRefGoogle Scholar
Fraser, K.J., Hawkesworth, C.J., Erlank, A.J., Mitchell, R.H. and Scott-Smith, B.H. (1985) Sr, Nd and Pb isotope and minor element geochemistry of lamproites and kimberlites. Earth Planet. Sci. Lett., 76, 57–70.CrossRefGoogle Scholar
Gibson, S.A., Thompson, R.N., Leat, P.T., Norrison, N.A., Hendry, G.L., Dickin, A.P. and Mitchell, J.G. (1993) Ultrapotassic magmas along the flanks of the Oligo-Miocene Rio Grande rift, USA: monitors of the zone of lithospheric extension and thinning beneath a continental rift. J. Petrol, 34, 187–228.CrossRefGoogle Scholar
Gibson, S.A., Thompson, R.N., Leonardos, O.H., Dickin, A.P. and Mitchell, J.G. (1995) The Late Cretaceous impact of the Trindade mantle plume: evidence from large-volume, mafic, potassic mag-matism in SE Brazil. J. Petrol, 36, 189–229.CrossRefGoogle Scholar
Hurford, A., Jager, E. and Ten Cate, J.A.M. (1986) Dating young sediments. CCOP technical secretariat, Bankok, Thailand. Ito, E., White, M.W. and Gopel, C. (1997) The O, Sr, Nd and Pb isotope geochemistry of MORB. Chem. GeoL, 62, 157–76.Google Scholar
Jaques, A.L., Lewis, J.D., Smith, C.B., Gregory, G.P., Ferguson, J., Chapell, B.W. and McCulloch, M.T. (1984) The diamond-bearing ultrapotassic (lamproi-tic) rocks of the West Kimberley region, Western Australia. In: Kimberlites I: Kimberlites and related rocks (ed.) Kornprobst, J., Elsevier Sci. Pub. B.V., Amsterdam.Google Scholar
Jaques, A.L., Lewis, J.D. and Smith, C.B. (1986) The kimberlites and lamproites of Western Australia. Ceol. Surv. Western Aust. Bull, 132, 268 pp.Google Scholar
Kanucov, B., Machotkin, I.L. and Golovanova, T.I. (1991) Petrology of potassic volcanic series of Yakokut volcano-plutonic complex, Central Aldan. 1st. AN SSSR, ser. geol, 12, 83–93. (in Russian).Google Scholar
Kotchetkov, A.Ya. and Lasebnik, K.A. (1984) Alkaline ultrabasic and basic rocks of Yakokut massive (Central Aldan). In: Geochemistry and mineralogy of basic and ultrabasic rocks of the Siberian Platform. Yakutsk, 62-80 (in Russian).Google Scholar
Machotkin, I.L. (1992) Sr and Nd isotopes of Aldan lamproites. Dokl. Akad. Nauk, 325, 576–80. (in Russian).Google Scholar
Machotkin, I.L., Arakeljatz, M.M. and Vladikin, N.V. (1989) Age of the Aldan lamproite province. Dokl. Akad. Nauk SSSR, 306, 703–7. (in Russian).Google Scholar
Machotkin, I.L., Zhuravlev, A.Z. and Kononova, V.A. (1991) Geochemical types of lamproites of different regions of the world. In: Geochemistry of igenous rocks, Vernadsky Inst. of Geochem. Moscow, 151-2 (in Russian).Google Scholar
Maksimov, E.P. (1972) Ring-type magmatic complexes of the Aldan Shield. 1st. AN SSSR, ser. geol, 3, 33–44. (in Russian).Google Scholar
Maksimov, E.P. and Ugryumov, A.N. (1971) Mesozoic magmatic formations of the Aldan Shield. Sov. Geol, 7, 107–119. (in Russian).Google Scholar
McCulloch, M.T., Jaques, A.L., Nelson, D.R. and Lewis, J.D. (1983) Nd and Sr isotopes in kimberlites and lamproites from Western Australia: an enriched mantle origin. Nature, 302, 400–3.CrossRefGoogle Scholar
McKenzie, D.P. (1989) Some remarks on the movement of small melt fractions in the mantle. Earth Planet. Sci. Lett., 95, 53–72.CrossRefGoogle Scholar
Mitchell, R.H. (1985) A review of the mineralogy of lamproites. Trans, geol Soc. S. Afr., 88, 411–37.Google Scholar
Mitchell, R.H. (1986) Kimberlites, Mineralogy, Geochemistry and Petrology. New York: Plenum, 442pp.Google Scholar
Mitchell, R.H. and Bergman, S.C. (1991) Petrology of lamproites. Plenum Press, New York. 447 pp.CrossRefGoogle Scholar
Mues, U. (1993) Geochemische und radiometrische Untersuchungen an Lampwiten und anderen Alka-ligesteinen von Yakokut und Inagli, Aldan Schild, Ostsibirien. PhD thesis Univ. Freiburg, pp. 158.Google Scholar
Nelson, D.R., McCulloch, N.T. and Sun, S.-s. (1986) The origins of ultrapotassic rocks as inferred from Sr, Nd and Pb isotopes. Geochim. Cosmochim. Ada, 50, 231-45.CrossRefGoogle Scholar
Niggli, P. (1923) Gesteins-und Mineralprovinzen. Gebruder Borntraeger, Berlin, 586 pp.Google Scholar
Pearce, J.A. (1983) Role of the sub-continental litho-sphere in magma genesis at active continental margins. In: Continental basalts and mantle xenoliths Hawkesworth, C.J. and Norry, M.J. (eds.). Shiva Geol. Ser., 230-53.Google Scholar
Peccerillo, A., Poli, G. and Serri, G. (1988) Petrogenesis of orenditic and kamafugitic rocks from central Italy. Can. Mineral., 26, 45–65.Google Scholar
Perchuk, L.L., Aranivich, L.Ya., Podlesskiy, K.K., Lavrant'eva, I.L., Gerasimov, V.Yu., Fed'kin, V.V., Kitsul, V.I., Karsakov, L.P. and Berdnikov, N.V. (1985) Precambrian granulites of the Aldan Shield, eastern Siberia. J. Metamorph. Geol., 3, 265–310.CrossRefGoogle Scholar
Robert, J.L. (1976) Titanium solubility in synthetic phlogopite solid solution. Chem. Geol., 17, 213–27.CrossRefGoogle Scholar
Rock, N.M.S. (1991) Lamprophyres. Glasgow, Blackie, 285 pp.Google Scholar
Roeder, P.L. and Emslie, R.F. (1970) Olivine-liquid equilibrium. Contrib. Mineral. Petrol., 68, 325–44.CrossRefGoogle Scholar
Sahama, T.G. (1974) Potassium-rich alkaline rocks. In: Sorensen, H. (ed.) The alkaline rocks. Wiley, New York 96-109.Google Scholar
Scott-Smith, B.H. and Skinner, E.M.W. (1984a) Dia-mondiferous lamproites. J. Geol., 92, 433–8.CrossRefGoogle Scholar
Scott-Smith, B.H. and Skinner, E.M.W. (1984b) A new look at Prairie Creek, Arkansas. In: Kimberlites 1: Kimberlites and Related Rocks (Kornprobst, J., ed.) Elsevier, 255-83.CrossRefGoogle Scholar
Steiger, R.H. and Jager, E. (1977) Subcomission on geochronology: convention on the use of decay constants in geo-and cosmochronology. Earth Planet. Sci. Lett., 36, 359–62.CrossRefGoogle Scholar
Sun, S.-s. and McDonough, W.F. (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Magma-tism in the oceanic basins, Saunders, A.D. and Norry, M.J. (eds.). Geol. Soc. Spec. Publ., 42, 313–45.Google Scholar
Thompson, R.N., Leat, P.T., Morrison, M.A., Hendry, G.L. and Gibson, S.A. (1990) Strongly potassic mafic magmas from lithospheric mantle sources during continental extension and heating: evidence from Miocene minettes of northwestColorado U.S.A.. Earth Planet. Sci. Lett., 98, 139–53.CrossRefGoogle Scholar
Tronnes, R.G., Edgar, A.D. and Arima, M. (1985) A high-pressure—high-temperature study of TiO2 solubility in Mg-rich phlogopite: implications to phlogopite chemistry. Geochim. Cosmochim. Ada, 49, 2323–9.CrossRefGoogle Scholar
Venturelli, G., Capedri, S., Di Battistini, G., Kogarko, L.N. and Celestini, S. (1984) The ultrapotassic rocks from southeastern Spain. Lithos, 17, 37–54.CrossRefGoogle Scholar
Vollmer, R. and Norry, M.J. (1983) Possible origin of K-rich volcanic rocks from Virunga, East Africa by metasomatism of continental crustal material: Pb, Nd and Sr isotopic evidence. Earth Planet. Sci. Lett., 64, 374–86.CrossRefGoogle Scholar
Vollmer, R., Ogden, P., Schilling, J.-G., Kingsley, R.H. and Waggoner, D.G. (1984) Nd and Sr isotopes in ultrapotassic volcanic rocks from the Leucite Hills, Wyoming. Contrib. Mineral. Petrol, 87, 359–68.CrossRefGoogle Scholar
Wade, A. and Prider, R.T. (1940) The leucite-bearing rocks of the West Kimberley area, Western Australia. Q. J. geol. Soc. Land., 96, 39–98.CrossRefGoogle Scholar
Wilson, M. (1989) Igneous petrogenesis; a global tectonic approach. 466 pp.Google Scholar