Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks
Granites may be subdivided according to their intrusive settings into four main groups—ocean ridge granites (ORG), volcanic arc granites (VAG), within plate granites (WPG) and collision granites…
Experimental Constraints on Himalayan Anatexis
- A. P. Douce, N. Harris
- Geology
- 1 April 1998
isotopic compositions of peraluminous leucogranites; (2) We have melted metapelitic rocks from the High Himalayan Crystalline Sequence that are likely sources of leucogranite magmas. their common…
Post-collision, Shoshonitic Volcanism on the Tibetan Plateau: Implications for Convective Thinning of the Lithosphere and the Source of Ocean Island Basalts
Potassic volcanism has been widespread and semi-continuous on the Tibetan plateau since ~13 Ma, post-dating the orogenic thickening of the India—Asia collision. Volcanism may have commenced slightly…
Geochemical characteristics of collision-zone magmatism
Summary This paper reports the results of a systematic geochemical study of intermediate and acid intrusive rocks from a number of continent-continent collision zones of Phanerozoic age. Four groups…
Constant elevation of southern Tibet over the past 15 million years
It is concluded that the elevation of the southern Tibetan plateau probably has remained unchanged for the past 15 Myr, similar to the present-day altitude of 4,600 m.
Himalayan architecture constrained by isotopic tracers from clastic sediments
- Andy Richards, T. Argles, E. Draganits
- Geology
- 15 August 2005
Precambrian Tectonics and Crustal Evolution in South India
- S. Drury, N. Harris, R. Holt, G. J. Reeves-Smith, R. Wightman
- GeologyThe Journal of geology
- 1 January 1984
About 3.4 Ga ago voluminous calc-alkaline magmas represented by the granitoid gneisses of southern India were emplaced into a now poorly preserved non-continental crust. Unstable ensialic basins,…
Isotopic constraints on the structural relationships between the Lesser Himalayan Series and the High Himalayan Crystalline Series, Garhwal Himalaya
- T. Ahmad, N. Harris, M. Bickle, H. Chapman, J. Bunbury, C. Prince
- Geology
- 1 March 2000
Nd and Sr isotope systematics may provide important constraints on the location of major thrust systems that separate lithologically similar sedimentary sequences. The potential of the technique is…
Age and composition of dikes in Southern Tibet: new constraints on the timing of east-west extension and its relationship to postcollisional volcanism
- H. Williams, S. Turner, S. Kelley, N. Harris
- Geology
- 1 April 2001
Controversy exists over whether east-west extension in southern Tibet is related to plateau uplift or to the accommodation of plate boundary forces. Relationships between the onset of extension,…
40Ar-39Ar and Rb-Sr geochronology of high-pressure metamorphism and exhumation history of the Tavsanli Zone, NW Turkey
- S. Sherlock, S. Kelley, S. Inger, N. Harris, A. Okay
- Geology
- 15 October 1999
Abstract Geochronological investigations in high- and ultra-high-pressure metamorphic rocks are problematic since firstly the low temperatures lead to fine grain size and disequilibrium assemblages,…
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