none 10.1144/GSL.SP.2000.170.01.08 Geological Society of London Geological Society of London 1881 32634705 65091 2024072306082800472 10.1144 2024-07-23T15:05:46Z 2008-04-30T14:36:18Z 16 Geological Society, London, Special Publications SP 0305-8719 2041-4927 05 16 2007 01 2000 170 1 P. J. Treloar CEESR, School of Geological Sciences, Kingston University Kingston-upon-Thames KT1 2EE, UK D. C. Rex Department of Earth Sciences, Leeds University Leeds LS2 9JT, UK P. G. Guise Department of Earth Sciences, Leeds University Leeds LS2 9JT, UK J. Wheeler Department of Earth Sciences, Liverpool University Brownlow Street, Liverpool L69 3BX, UK A. J. Hurford Research School of Geological Sciences, Birkbeck College and University College London Gower Street, London WC1E 6BT, UK A. Carter Research School of Geological Sciences, Birkbeck College and University College London Gower Street, London WC1E 6BT, UK Abstract New amphibole, muscovite and biotite Ar-Ar and K-Ar data and zircon and apatite fission track data are presented from the western margin of the Nanga Parbat syntaxis as well as from the Indus and Astor valley sections which cross the syntaxis. Amphibole data date a regional cooling through 500°C at 25±5 Ma and are inconsistent with earlier suggestions that the peak of regional metamorphism was Neogene in age, although there is no doubt that some rocks were still at upper amphibolite facies temperatures as recently as 5 Ma. The data can be used to constrain structural models for syntaxial uplift. After an initial phase of crustal-scale buckling, bodily uplift of the syntaxis was along subvertical shear zones developed along its margins, although with a significantly higher time-averaged strain rate for shears developed along the western margin than along the eastern margin. The latter may be antithetic to the former. These shears were operative from 10 to < 1 Ma. In the southwestern part of the syntaxis, this subvertical uplift was superseded, since 6 Ma, by uplift along moderately SE-dipping NW-vergent shears on the hanging wall of which are located Neogene-aged migmatites. 05 23 2000 01 2000 137 162 10.1144/GSL.SP.2000.170.01.08 https://doi.org/10.15223/policy-002 10.1144/GSL.SP.2000.170.01.08 https://www.lyellcollection.org/doi/10.1144/GSL.SP.2000.170.01.08 https://www.lyellcollection.org/doi/pdf/10.1144/GSL.SP.2000.170.01.08 https://pubs.geoscienceworld.org/UrlRedirectHandler.ashx?routename=books&chapterdoi=10.1144/GSL.SP.2000.170.01.08&request=chapter 10.1016/0012-821X(69)90180-0 10.1144/GSL.SP.2000.170.01.04 Butler R. W. H. Structural evolution of the western margin of the Nanga Parbat massif Pakistan Himalaya: insights from the Raikot-Liachar area 2000 This volume 10.1038/333247a0 10.1007/BF01848687 10.1144/gsjgs.149.4.0557 10.1180/minmag.1997.061.404.05 10.1016/0012-821X(89)90150-7 10.1144/GSL.SP.2000.170.01.07 Butler R. W. H. Wheeler J. Treloar P. J. Jones C. Geological structure of the southern part of the Nanga Parbat massif Pakistan Himalaya and its tectonic implications 2000 This volume Geological Society of America Special Papers Tectonics of the Western Himalaya Chamberlain C. P. 23 1989 10.1130/SPE232-p23 Chamberlain C. P., Jan M. Q., Zeitler P. K. , Malinconico L. L., Lillie R. J. A petrological record of the collision between the Kohistan island arc and Indian Plate, northwest Himalaya Tectonics of the Western Himalaya 1989 232 23 32 Geological Society of America Special Papers 10.1016/0040-1951(90)90329-7 Terra Abstracts Cliff R. A. 489 3 1991 Generation and migration of isotopically extreme partial melts in active fault zones. EUG VI, Strasbourg Cliff R. A., Barnicoat A. C., Treloar P. J. Generation and migration of isotopically extreme partial melts in active fault zones. EUG VI, Strasbourg Terra Abstracts 1991 3 489 Geological Bulletin of the University of Peshawar Coward M. P. 147 18 1986 A section through the Nanga Parbat syntaxis, Indus Valley, Kohistan Coward M. P. A section through the Nanga Parbat syntaxis, Indus Valley, Kohistan Geological Bulletin of the University of Peshawar 1986 18 147 152 Geological Society, London, Special Publication Collision Tectonics Coward M. P. 205 1986 Coward M. P., Windley B. F., Broughton R. D., Luff I. W., Petterson M. G., Pudsey C. J., Rex D. C., Khan M. A. , Coward M. P., Ries A. C. Collision tectonics in the NW Himalayas Collision Tectonics 1986 19 205 221 Geological Society, London, Special Publication 10.1016/0012-821X(94)90143-0 10.1007/s004100050141 10.1029/90TC02709 10.1111/j.1525-1314.1991.tb00541.x 10.1007/BF00373790 10.1144/GSL.SP.2000.170.01.05 Edwards M. A. Kidd W. S. F. Khan M. A. Schneider D. A. Tectonics in the SW margin of the Nanga Parbat-Haramosh massif 2000 This volume 10.2138/am-1998-3-408 10.1016/S0009-2541(83)80002-3 10.1016/0016-7037(88)90304-3 10.1016/0040-1951(96)00082-0 Geological Society, London, Special Publications Himalayan Tectonics George M. T. 173 1993 George M. T., Butler R. W. H., Harris N. W. B. , Treloar P. J., Searle M. P. The tectonic implications of contrasting granite magmatism between the Kohistan island arc and the Nanga Parbat-Haramosh massif Himalayan Tectonics 1993 74 173 191 Geological Society, London, Special Publications 10.1029/94TC02906 10.1029/96TC03289 1998 Fall meeting, EOS Kidd W. S. F909 79 1998 Kidd W. S., Edwards M. A., Khan M. A., Schneider D. A., Zeitler P. K. , et al. Structure and chronology of Nanga Parbat Haramosh massif 1998 79 1998 Fall meeting, EOS suppl. 45 F909 10.1029/96JB01503 USGS Open-File Report A plotting and regression program for radiogenic-isotope data, for IBM-PC compatible computers Ludwig K. R. 1990 Ludwig K. R. A plotting and regression program for radiogenic-isotope data, for IBM-PC compatible computers 1990 88–557 USGS Open-File Report Geological Society of America Special Papers Tectonics of the Western Himalaya Madin I. P. 169 1989 10.1130/SPE232-p169 Madin I. P., Lawrence R. D., Ur-Rahman S. , Malinconico L. L., Lillie R. J. The North-western Nanga Parbat-Haramosh massif: evidence for crustal uplift at the northwestern corner of the Indian craton Tectonics of the Western Himalaya 1989 232 169 182 Geological Society of America Special Papers 10.1016/S0040-1951(96)00279-X 10.1016/0012-821X(73)90154-4 10.1016/0012-821X(85)90165-7 Geological Society, London, Special Publications Himalayan Tectonics Pognante U. 161 1993 Pognante U., Benna P., Le Fort P. , Treloar P. J., Searle M. P. High pressure metamorphism in the High Himalayan Crystallines of the Stak Valley, northeastern Nanga Parbat-Haramosh syntaxis, Pakistan Himalaya Himalayan Tectonics 1993 74 161 172 Geological Society, London, Special Publications 10.1007/s004100050290 10.1016/0012-821X(80)90181-8 10.1007/s004100050538 10.1016/S0012-821X(99)00022-9 10.1130/0091-7613(1999)027<0999:TONPWH>2.3.CO;2 10.1130/0091-7613(1998)026<0791:SPATHA>2.3.CO;2 10.1016/0012-821X(92)90213-F 10.1016/S0009-2541(96)00161-1 Terra Nova Thompson A. B. 84 9 1997 Soft orogenic deformation and metamorphism in convergent to transpressive regimes. EUG9, Strasbourg Thompson A. B., Schulmann K., Jezek J. Soft orogenic deformation and metamorphism in convergent to transpressive regimes. EUG9, Strasbourg Terra Nova 1997 9 suppl. 1 84 abstract 10.1016/S0040-1951(96)00289-2 10.1016/0040-1951(90)90317-2 10.1144/GSL.SP.2000.170.01.03 Treloar P. J. George M. T. Whittington A. G. Mafic sheets from Indian plate gneisses in the Nanga Parbat syntaxis: their significance in dating crustal growth and metamorphic and deformation events 2000 This volume 10.1007/BF01829374 10.1029/TC008i004p00881 10.1046/j.1365-3121.1998.00156.x 10.1017/S0016756800007871 10.1002/gj.3350300313 10.1016/0040-1951(96)00085-6 10.1144/GSL.SP.1996.138.01.11 Whittington A. G. Harris N. B. W. Baker J. Treloar P. J. O’Brien P. Low pressure crustal anatexis: the significance of spinel and cordierite from metapelitic assemblages at Nanga Parbat northern Pakistan 1998 134 183 198 Geological Society of London Special Publication 10.1086/629759 10.1130/0091-7613(1994)022<1075:DEFASG>2.3.CO;2 10.1029/96TC00032 10.1029/TC004i001p00127 10.1029/91TC00168 10.1130/0091-7613(1993)021<0347:SAMARD>2.3.CO;2 Geological Society of America Special Papers Tectonics of the Western Himalaya Zeitler P. K. 1 1989 Zeitler P. K., Sutter J. F., Williams I. S., Zartman R., Tahirkelli R. A. K. , Malinconico L. L., Lillie R. J. Geochronology and temperature history of the Nanga Parbat-Haramosh massif, Pakistan Tectonics of the Western Himalaya 1989 232 1 22 Geological Society of America Special Papers