Abstract
Initial Nd and Sr isotopic ratios have been measured for Cretaceous acidic and related intermediate rocks (24 volcanic and two plutonic rocks) from the Inner Zone of Southwest Japan (IZSWJ) to investigate the genesis of acidic magmas. The initial Nd and Sr isotopic ratios for these rocks show three interesting features: (1) ε Nd values for acidic rocks (+2 to −9) are negatively correlated with ε Sr values (+10 to +90) together with those for intermediate rocks (ε Nd=+3 to -8; ε Sr=0 to +65). (2) The ε Nd values for silica rich rocks (>60% SiO2) correlate with the longitude of the sample locality, decreasing from west to east in a stepwise fashion: Four areas characterized by uniform ε Nd values are discriminated. (3) Low silica rocks (<60% SiO2) in a certain area have distinctly different ε Nd values from those of the high silica rocks in the same area.
These results as well as those deduced from the additional samples collected, for comparison, from other provinces in Japan suggest that the acidic rocks can be formed neither by fractional crystallization processes from more basic magmas nor by crustal assimilation processes. The isotopic variations of the acidic rocks may reflect regional isotopic heterogeneity in the lower crust, and this heterogeneity may ultimately be attributed to the regional heterogeneity of the uppermost-mantle beneath the Japanese Islands.
Similar content being viewed by others
References
Allegre CT, Othman DB (1980) Nd-Sr isotopic relationship in granitoid rocks and continental crust developement: a chemical approach to orogenesis. Nature 286:335–341
Aoki H, Tada T, Sasaki Y, Ooida T, Muramatsu Y, Shimamura H, Furuya I (1972) Crustal structure in the profile across central Japan as derived from explosion seismic observations. J Phys Earth 20:197–223
Aramaki S, Ui T (1978) Major element frequency distribution of the Japanese Quaternary volcanic rocks. Bull Volcanol 41:390–407
Barker PE, Buckley F, Holland JG (1974) Petrology and geochemistry of Easter Island. Contrib Mineral Petrol 44:85–100
Bateman PC, Eaton JP (1967) Sierra Nevada batholith. Science 158: No. 3807: 1407–1417
Carlson RW, Lugmair GW, Macdougall JD (1981) Columbia River volcanism: the question of mantle heterogenity or crustal contamination. Geochim Cosmochim Acta 45:2483–2499
Chappell BW, White AJR (1974) Two contrasting granite types. Pac Geol 8:173–174
Czamanske GK, Ishihara S, Atkin SA (1981) Chemistry of rock-forming minerals of the Cretaceous-Paleocene batholith in Southwestern Japan and implications for magma genesis. J Geophys Res 86:10431–10469
Condie KC (1973) Archean magmatism and crustal thickening. Geol Soc Am Bull 84:2981–2992
DePaolo DJ (1980) Sources of continental crust: Neodymium isotope evidence from the Sierra Nevada and Peninsular Ranges. Science 209:684–687
DePaolo DJ (1981a) A neodymium and strontium isotopic study of the Mesozoic calc-alkaline granitic batholiths of the Sierra Nevada and Peninsular Ranges, California. J Geophys Res 86:10470–10488
DePaolo DJ (1981b) Trace element and isotopic effects of combined wallrock assimilation and fractional crystallization. Earth Planet Sci Lett 53:189–202
DePaolo DJ, Wasserburg GJ (1976a) Nd isotopic variations and petrogenetic models. Geophys Res Lett 3:249–252
DePaolo DJ, Wasserburg GJ (1976b) Inferences about magma source and mantle structure from variations of 143Nd/144Nd. Geophys Res Lett 3:743–746
DePaolo DJ, Wasserburg GJ (1977) The sources of island arcs as indicated by Nd and Sr isotopic studies. Geophys Res Lett 4:465–468
DePaolo DJ, Johnson RW (1979) Magma genesis in the New Britain island-arc: Constraints from Nd and Sr isotopes and trace-element patterns. Contrib Mineral Petrol 70:369–379
Dickinson WR (1975) Potash-depth (K-h) relations in continental margin and intraoceanic magmatic arcs. Geology 3:53–56
Domenick MA, Kistler PW, Dodge FCW, Tatsumoto M (1983) Nd and Sr isotopic study of crustal and mantle inclusions from the Sierra Nevada and implications for batholith petrogenesis. Geol Soc Am Bull 94:713–719
Dosso L, Murthy VR (1980) A Nd isotopic study of the Kerguelen Islands: Inferences on enriched oceanic mantle sources. Earth Planet Sci Lett 48:268–276
Eichelberger JC (1978) Andesites in island arcs and continental margins: Relationship to crustal evolution. Bull Volcanol 41:480–450
Fugimaki H, Kurasawa H (1980) Lateral variation of REE pattern of basaltic magma across the Japan Arc. J Jpn Assco Min Petr Econ Geol 75:313–322
Fujitani T, Masuda A (1981) Light REE inclincation and distance from volcanic front: a case of volcanic rocks in Northeastern Japan. Geochem J 15:269–281
Hamilton PJ, O'Nions RK, Pankhurst RJ (1980) Isotopic evidence for the provinance of some Caledonian granites. Nature 287:279–284
Hedge CE, Kight RJ (1969) Lead and strontium isotopes in volcanic rocks from northern Honshu, Japan. Geochem J 3:15–24
Hilde TWC, Uyeda S, Kroenke L (1977) Evolution of the western Pacific and its margin. Tectonophysics 38:145–165
Ichikawa K, Murakami N, Hase A, Wadatsumi K (1968) Late Mesozoic igneous activity in the inner side of southwest Jpn Pac Geol 1:97–118
Ishihara S (1971) Modal and chemical composition of the granitic rocks related to the major molybdenum and tungsten deposits in the Inner Zone of southwest Japan. J Geol Soc Jpn 77:441–452
Ishihara S (1973) The Mo-W metallogenic provinces and related granitic provinces. Min Geol Tokyo 23:13–32 (in Japanese)
Ishihara S (1977) The magnetite-series and ilmenite-series granitic rocks. Min Geol 27:293–305
Ishizaka K (1969) U-Th-Pb ages of zircon from the Ryoke metamorphic terrain, Kinki district. J Jpn Assoc Min Petrol Econ Geol 62:191–197 (in Japanese)
Ishizaka K, Yamaguchi M (1969) U-Th-Pb ages of sphene and zircon from the Hida metamorphic terrain, Jpn Earth Planet Sci Lett 6:179–185
Ishizaka K, Yanagi T (1977) K, Rb and Sr abundances and Sr isotopic composition of the Tanzawa granitic and associated gabbroic rocks, Japan: Low-potash island arc plutonic complex. Earth Planet Sci Lett 33:345–352
Ishizaka K, Carlson RW (1983) Nd-Sr systematics of the Setouchi volcanic rocks, southwest Japan: a clue to the origine of orogenic andesite. Earth Planet Sci Lett 64:327–340
Jacobsen SB, Wasserburg GJ (1980) Sm-Nd isotopic evolution of chondrites. Earth Planet Sci Lett 50:139–155
Katada M, Kanaya H (1980) Potassium, rubidium, strontium, thrium and uranium of the Cretaceous plutons in the Kitakami mountains. J Jpn Assoc Min Petrol Econ Geol 75:173–185 (in Japanese)
Langmuir CH, Vocks RD, Hanson GN, Hart SR (1978) A general mixing equation with application to icelandic basalts. Earth Planet Sci Lett 37:380–392
Lugmair GW, Marti K, Kurtz JP, Scheinin NB (1976) History and genesis of lunar troctolite 76535 or: How old is old? Proc Lunar Sci Conf 7th, pp 2009–2033
Lugmair GW, Carlson RW (1978) The Sm-Nd histry of KREEP. Proc 9th Lunar Planet Sci Conf, pp 689–704
Masuda A (1966) Lanthanides in basalts of Japan with three distinct types. Geochem J 1:11–26
Masuda A, Nakamura N, Tanaka T (1973) Fine structure of mutually normalized rare-earth patterns of chondrites. Geochim Cosmochim Acta 37:239–248
Masuda Y, Yagi S, Mitsuji T, Nishimura S (1983) Trace element contents in the granitic rocks from southwestern Japan, (1) Chugoku district. J Jpn Assoc Min Petrol Econ Geol 78:41–50 (in Japanese)
Maxwell JA (1968) Rock and mineral analysis: A series of monographs on analytical chemistry and its applications. Vol 27, Intersicence Publishers
McCulloch MT, Chappell BW (1982) Nd isotopic characteristics of S- and I-type granites. Earth Planet Sci Lett 58:51–64
McCulloch MT, Gregory RT, Wasserburg GJ, Taylor HP Jr (1980) A neodymium, strontium and oxygen isotopic study of the Cretaceous Samail Ophiolite and implications for the petrogenesis and seawater-hydrothermal alteration of oceanic crust. Earth Planet Sci Lett 46:201–211
McCulloch MT, Jaques AL, Nelson DR, Lewis JD (1983) Nd and Sr isotopes in Kimberites and lamproites from western Australia: an enriched mantle origin. Nature 302:400–403
McLennan SM, Nance WB, Taylor SR (1983) Rare earth element-thorium correlations in sedimentary rocks, and the composition of the continental crust. Geochim Cosmochim Acta 44:1833–1839
Menzies MA, Leeman WP, Hawkesworth CJ (1983) Isotope geochemistry of Cenozoic volcanic rocks reveals mantle heterogenity below USA. Nature 303:205–209
Miyashiro A (1972) Metamorphism and related magmatism in plate tectonics. Am J Sci 272:629–656
Miyashiro A (1974) Volcanic rock series in island arc and active continental margins. Am J Sci 274:321–355
Nakamura N (1974) Determination of REE, Ba, Fe, Mg, Na, and K in carbonaceous and ordinary chondrites. Geochim Cosmochim Acta 38:757–775
Nakamura N, Yasuda T, Itome S, Ito H (1981) Nd and Sr isotopic variations in Quaternary volcanic rocks from northeast Japan. Abstracts of IAVCEI symposium, pp 252–253
Nakano Y (1980) Tectonic study on the basal part of Izu-Peninsulra. M.A. thesis of Kobe University, (in Japanses)
Nohda S, Wasserburg GJ (1981) Nd and Sr isotopic study of volcanic rocks from Japan. Earth Planet Sci Lett 52:264–276
Notsu K (1983) Strontium isotope composition in volcanic rocks from the Northeast Japan arc. J Volcanol Geotherm Res 18:531–548
Nozawa T (1977) Radiometric age map of Japan, 1) Granitic rocks and 2) Metamorphic rocks. Geol Surv Japan 1∶2,000,000 Map Series 16–1 and 2.
Okamoto K, Nohda S, Masuda Y, Matsumoto T (1975) Significance of Cs/Rb ratios in volcanic rocks as exemplified by the Nohi Rhyolite complex, Central Japan. Geochemi J 9:201–210
Otofuji Y, Matsuda T (1983) Paleomagnetic evidence for the clockwise rotation of Southwest Japan. Earth Planet Sci Lett 62:349–359
RGLM (Research group for late Mesozoic igneous activity of southwest Japan) (1967) Late Mesozoic igneous activity and tectonic histry in the inner zone of southwest Japan. Assoc Geol Collab Japan Monograph 13:50 (in Japanese)
Seki T (1978) Rb-Sr geochronology and petrogenesis of the late Mesozoic igneous rocks in the inner zone of southwestern part of Japan. Mem Fac Sci Kyoto Univ, Seri Geol Min, XLV:71–110
Seki T (1981) Ages and initial Sr isotopic ratios for Cretaceous volcanic rocks in the Inner Zone of Southwest Japan. Abstr Issue Annual Meet Geol Soc Japan 88th 324 (in Japanese)
Shibata K, Adachi M (1974) Rb-Sr whole-rock ages of Precambrian metamorphic rocks in the Kamiaso congromerate from central Japan. Earth Planet Sci Lett 21:277–287
Shibata K, Ishihara S (1979a) Rb-Sr whole-rock and K-Ar mineral ages of granitic rocks in Japan. Geochemi J 13:113–119
Shibata K, Ishihara S (1979b) Initial 87Sr/86Sr ratios of plutonic rocks from Japan. Contrib Mineral Petrol 70:381–390
Sugimura A, Uyeda S (1973) Island Arcs; Japan and its environs. Elsevier, Amsterdam
Sugisaki R, Shimomura T, Ando K (1977) An automatic X-ray fluorescence method for the analysis of silicate rocks. J Geol Soc Jpn 83:725–733
Stern CR, Wyllie PJ (1981) Phase relationships of I-type granite with H2O to 35 kirobars: The Dinkey Lakes biotite-granite from the Sierra Nevada batholith. J Geophys Res 86:10412–10422
Takahashi M, Aramaki S, Ishihara S (1980) Magnetite-series/Il-menite-serie vs. I-type/S-type granitoids. Min Geol Spec Issue 8:13–28
Takita R (1974) Petrography and plutonic histry of the Tanzawa tonalite complex. J Geol Soc Jpn 80:505–523 (in Japanese)
Tatsumi Y (1982) Origin of high magnesian andesites in the Setouchi volcanic belt, southwest Japan, II. Melting phase relations at high pressure. Earth Planet Sci Lett 60:306–317
Tatsumi Y, Ishizaka K (1982) Origin of high-magnesian andesites in the Setouchi volcanic belt, southwest Japan, I. Petrographical and chemical characteristics. Earth Planet Sci Lett 60:293–304
Uyeda S, Miyashiro A (1974) Plate tectonics and the Japanese islnds: a synthesis. Geol Soc Am Bull 85:1159–1170
Vollmer R (1976) Rb-Sr and U-Th-Pb systematics of alkaline rocks: the alkaline rocks from Italy. Geochim Cosmochim Acta 40:283–295
Wasserburg GJ, Jacobsen SB, DePaolo DJ, McCulloch MT, Wen T (1981) Precise determination of Sm/Nd ratios, Sm and Nd isotopic abundances in standard soltuions. Geochim Cosmochim Acta 45:2311–2328
Wright TL, Okamura RT (1977) Cooling and crystallization of tholeiitic basalt, 1965 Makaopushi lava lake, Hawaii. Geol Surv Prop Pap US, p 1004
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Terakado, Y., Nakamura, N. Nd and Sr isotopic variations in acidic rocks from Japan: significance of upper-mantle heterogeneity. Contr. Mineral. and Petrol. 87, 407–417 (1984). https://doi.org/10.1007/BF00381297
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00381297