 | | Journal (article/letter/editorial) | | relationships at two magmatic centers: Marangudzi in Zimbabwe and Mt. Brome in Quebec, Canada. At each...nonternary components such as Fe (e.g., Srzs, 1972); complex fractional crystallization, selective mineral ~so~tion...with >80% of the ternary com~nents) from the Marangudzi complex are projected onto the petrogeny’s residua...be reported elsewhere. LOCALITIES OF STUDY Marangudzi and Mt. Brome are broadly similar Mesozoic epizonal...subvolcanic associations found worldwide. For each complex, the neodymium and strontium isotope compositions |  | | Journal (article/letter/editorial) | | and geochemistry of acid veins in the Freetown complex, Sierra Leone R. D. BECKINSALE, J. F. W. BOWLES...dating other, similar, intrusions. T H E Freetown Complex is a large basic intrusion on the western seaboard...produced by separate episodes of intrusion. The Complex is intruded into Precambrian metamorphic rocks...Liberia and that of Sierra Leone, the Freetown Complex, and the initial rifting that led to the formation...polarity reversal occurred during the cooling of the Complex (Briden, Henthorn, and Rex, I97I ), for which a |  | | Book | | Japan-Ryukyu Izu-Bonin-Marianas Philippines-Sulawesi South-west Pacific New Zealand Sumatra-Java Southern Italy...sea-level is Macquarie Island, situated 1100 kilometres south-west of New Zea¬ land. In the northern part of the...section through the Macquarie Island ophiolite complex (after Griffin and Varne 1980). VOLCANIC SEQUENCE...Sediments SHEETED DYKE COMPLEX MASSIVE GAB BROS LAYERED GABBR0 COMPLEX X~ X X—X~X~X— x— x — X...present-day volcanism is concentrated in a north¬ east-south-west belt through the middle of Iceland, lying parallel |  | | Book | | AIr ring complexes and the chapter devoted to the Cameroon line. A detailed review of African ring complexes...discrimination between tholeiitic, transitional and alkaline ring complexes. Based on the available data (including...so-called alkaline intrusions which occur in African ring complexes are associated with tholeiitic or transitional...geochemical criteria discriminating the anorogenic ring complexes (including A - granites s.s.) from the...review our present knowledge of the main African ring complexes and emphasize the need for a new classification |  | | Book | | of necessity limited. The Geological Society of South Africa recently published in a single volume a large...canyons of two drainage systems, one north and one south of the Wallowa-Seven Devils Mountains divide (Hooper...certainly present in the thicker sections to the south. The flows are divided into eleven chemical types...magnetic polarity at the base of the Imnaha Basalt, south of the Wallowa Mountains (Swanson et aI., 1979;...northwest. Rl Grande Ronde flows extend as far south and east as do Imnaha flows (Fig. 3a; Fitzgerald |  | | Journal (article/letter/editorial) | | 0006 Adams, C. J. D. K/Ar ages from the basement complex of the Channel Islands (United Kingdom) and the...Greenland Group and Constant Gneiss, West Coast, South Island 28(1): 98-104 0008 Adams, I.; Thomas, J...and oxygen isotope ratio of snow and firn in the South Pole region 3(3): 267-274 0034 Alderton, D. H...Measurements relating to the genesis of the Tsumeb pipe, South-West Africa 9(5): 448-453 0056 Allsopp, H. L.;...the early Precambrian Amitsoq gneisses, Godthaab District, West Greenland 19(1): 22-28 0114 Baadsgaard |
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