 | | Journal (article/letter/editorial) | | ISOTOPE DATA TO THE PETROGENESIS OF THE MARANGUDZI RING COMPLEX, RHODESIA K.A. FOLAND Department of Geology...1975 The Marangudzi ring complex, Rhodesia, consists essentially ofa gabbro mass intruded by ring dykes...short time span. 1. Introduction The Marangudzi igneous complex is located in southeast Rhodesia, approximately...approximately 80 km east of Beitbridge. The complex, emplaced into the roughly 2.7 b.y. old granitic basement...the Limpopo orogenic belt [1], is one of several ring complexes occurring in the Nuanetsi igneous province |  | | 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 |  | Riishuus, M. S., Peate, D. W., Tegner, C., Wilson, J. R., Brooks, C. K. (2008) Petrogenesis of Cogenetic Silica-Oversaturated and -Undersaturated Syenites by Periodic Recharge in a Crustally Contaminated Magma Chamber: the Kangerlussuaq Intrusion, East Greenland. Journal of Petrology, 49 (3) 493-522 doi:10.1093/petrology/egm090 | Journal (article/letter/editorial) | | volumetrically dominated by the Kangerlussuaq Alkaline Complex, which includes the KI (Wager, 1965; Kempe & Deer...world. To the authors’ knowledge the Brandberg Complex (Schmitt et al., 2000), and Khibina and Lovozero...(1993) presented data from the complexes of Marangudzi, Zimbabwe, and Mt. Brome, southern Quebec, characterized...and nepheline syenites (e.g. the Il|¤ maussaq, Marangudzi and Mt. Brome complexes), the Kangerlussuaq Intrusion...basement. (b) Map of the Kangerlussuaq Alkaline Complex west of Kangerlussuaq Fjord (after Kempe et al |  | | Journal (article/letter/editorial) | | and Petrology of the Red Hill Alkaline Igneous Complex, New Hampshire, U.S.A. by C. M. B. HENDERSON 1...has shown that it consists of several units with ring- or pluglike form, in order of intrusion: Outer...fluid-saturated conditions. It seems likely that the complex formed by emplacement of fractionated magmas derived...These were intruded into the OCS/NSS unit along ring fractures to form the FTS and GPS units. Rock and...after the main complex was formed. INTRODUCTION This study of the Red Hill complex forms part of continuing |  | | 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 |
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