Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Michael P. Atherton"'
Autor:
P. J. Brenchley, Michael P. Atherton
Publikováno v:
Geological Journal. 8:161-178
The sequence and structure of the volcanic rocks of a small area lying within the main belt of plutons of the Peruvian Andes were mapped and are here described. Metamorphic zoning of the calcareous aureole minerals was shown to be similar to that des
Autor:
Michael P. Atherton, M. S. Brotherton
Publikováno v:
Geological Journal. 17:185-221
Major element composition of the available analysed pelitic rocks of the Dalradian of Scotland is examined in relation to geographical position, mineralogy, metamorphic grade and stratigraphy. Some of the large variations found are due to geographica
Autor:
Azman A. Ghani, Michael P. Atherton
Publikováno v:
Transactions of the Royal Society of Edinburgh: Earth Sciences. 97:437-454
The Late Caledonian granites of Donegal are all intruded into metasediments of the Dalradian Supergroup of Neoproterozoic age, which were metamorphosed and deformed during the Grampian Phase of the Caledonian orogeny at c. 470–460 m.y. They were in
Autor:
Azman A. Ghani, Michael P. Atherton
Publikováno v:
Lithos. 62:65-85
None of the existing models for calc-alkaline “Late Granite” (Siluro–Devonian) genesis in the metamorphic Caledonian orogenic belt of Ireland and Scotland fully explains their spatial, age or chemical character. A consistent model must involve
Autor:
Mike Haederle, Michael P. Atherton
Publikováno v:
Tectonophysics. 345:17-28
The Coastal Batholith of Peru extends over 1600 km parallel to the coast along the Andean trend. Gravity profiles on three traverses across the batholith indicate the geometry is essentially that of a flat slab with average thickness from 2.0–3.2 k
Autor:
Michael P. Atherton, Nick Petford
Publikováno v:
Journal of South American Earth Sciences. 9:1-9
In much of the Andes there is a migration of the plutonic locus with time from the coast to the high Andres. As continental crust also thickens in that direction a simple model involving an increasing continental crust component in the magmas inboard
Autor:
Michael P. Atherton, Nick Petford
Publikováno v:
Journal of Petrology. 37:1491-1521
Publikováno v:
Journal of South American Earth Sciences. 9:69-78
Combined strontium and neodymium isotope data on the Miocene-Pliocene Cordillera Blanca batholith (9–11 °S) are compared with acid plutonic and volcanic rocks of similar age and composition from the central Andes (ca. 16–23 °S). Although intrud
Autor:
MICHAEL P. ATHERTON
Publikováno v:
Geological Society, London, Memoirs. 16:221-235
Publikováno v:
Contributions to Mineralogy and Petrology. 117:66-75
Variation in the primary textures of “Cordilleran” granitic rocks is described relative to three identifiable stages of the crystallisation interval; namely: (1) crystallisation in suspension; (2) growth of a touching crystal framework; (3) inter