The effect of initial230Th disequilibrium on young UPb ages: the Makalu case, Himalaya

U. Schäer, J. Hamet and C.J. Allègre, The Transhimalaya (Grangdese) plutonism in the Ladakh region; an UPb and RbSr study, Earth Planet. Sci. Lett. 67 (in press).

Allègre, 1974, 238U/206Pb-235U/207Pb-232Th/208Pb zircon chronology in alpine and non-alpine environment, Contrib. Mineral. Petrol., 43, 163, 10.1007/BF01134835

Schärer, 1983, The Palung granite (Himalaya); high-resolution UPb systematics in zircon and monazite, Earth Planet. Sci. Lett., 63, 423, 10.1016/0012-821X(83)90115-2

Mattinson, 1973, Anomalous isotopic composition of lead in young zircons, Carnegie Inst. Washington Yearb, 72, 613

Manhès, 1978, Comparative uranium-thorium-lead and rubidium-strontium study of the Saint Séverin amphoterite: consequences for early solar system chronology, Earth Planet. Sci. Lett., 39, 14, 10.1016/0012-821X(78)90137-1

Schärer, 1982, Uranium-lead system in fragments of a single zircon grain, Nature, 295, 585, 10.1038/295585a0

Schärer, 1982, Investigation of the Archaean crust by single-grain dating of detrital zircon: a graywacke of the Slave Province, Canada, Can. J. Earth Sci., 19, 1910, 10.1139/e82-169

Krogh, 1973, A low contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations, Geochim. Cosmochim. Acta, 37, 488, 10.1016/0016-7037(73)90213-5

C. Gariépy, R.H. Xu and C.J. Allègre, Initial lead isotopic composition of young granitoid rocks from the Himalaya-Tibet zone (in preparation).

Allègre, 1976, Fine chronology of volcanic processes using238U230Th systematics, Earth Planet. Sci. Lett., 28, 395, 10.1016/0012-821X(76)90201-6

Tera, 1972, UThPb systematics in three Apollo 14 basalts and the problem of initial Pb in lunar rocks, Earth Planet. Sci. Lett., 14, 281, 10.1016/0012-821X(72)90128-8

Allègre, 1980, NdSr isotopic relationship in granitoid rocks and continental crust development: a chemical approach to orogenesis, Nature, 286, 335, 10.1038/286335a0

Dietrich, 1981, The leucogranites of the Bhutan Himalaya (central anatexis versus mantle melting), Schweiz. Mineral. Petrogr. Mitt., 61, 177

Ph. Vidal, 1982, Cocherie and P. Le Fort, Geochemical investigations of the origin of the Manaslu leucogranite (Himalaya, Nepal), Geochim. Cosmochim. Acta, 46, 2279, 10.1016/0016-7037(82)90201-0

Tilton, 1960, Volume diffusion as a mechanism for discordant lead ages, J. Geophys. Res., 65, 2933, 10.1029/JZ065i009p02933

Wasserburg, 1963, Diffusion processes in lead-uranium systems, J. Geophys. Res., 68, 4823, 10.1029/JZ068i016p04823

Wetherill, 1956, Discordant uranium-lead ages, I., Trans. Am. Geophys. Union, 37, 320, 10.1029/TR037i003p00320

Jaupart, 1981, Heat flow studies: constraints on the distribution of uranium, thorium and potassium in the continental crust, Earth Planet. Sci. Lett., 52, 328, 10.1016/0012-821X(81)90187-4

Stuckless, 1981, UThPb systematics in hydrothermally altered granites from the Granite Mountains, Wyoming, Geochim. Cosmochim. Acta, 45, 635, 10.1016/0016-7037(81)90038-7

Bacon, 1982, Accumulation rates of230Th,231Pa, and some transition metals on the Bermuda Rise, Geochim. Cosmochim. Acta, 46, 651, 10.1016/0016-7037(82)90166-1

Brunel, 1979, Structural analysis and tectonic evolution of the Central Himalayas of Nepal, 247