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A proposed continental margin in the precambrian of Western Kenya

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Zusammenfassung

Quer durch das Präkambrium des westlichen Kenya wurde vom W nach E im Wechsel der tektonischen Einheiten beobachtet, der von Archaischem Vorland über aufgearbeitetes Archaikum bis hin zu Metasedimenten und schließlich ophiolithischen Gesteinen reicht. In den hiermit verbundenen sedimentären Gesteinen wurde, obgleich diese stark deformiert und hoch metamorph sind, ein hiermit übereinstimmender Wechsel vom Kontinent zum Kontinentalrand zum Schelf und zu Bedingungen der Tiefsee beobachtet.

Abstract

From west to east across the Precambrian of western Kenya a change of tectonic units from Archaean foreland, through reworked Archaean to metasediments and then ophiolitic rocks, of the Pan-African Mozambique belt, is recognised. Although highly deformed and metamorphosed a coincident change from continent to continental margin, to shelf and then deep sea conditions, is also recognised in the associated sedimentary rocks.

Résumé

En allant d'ouest en est dans le Précambrien du Kénya occidental, on reconnaît un changement d'unités tectoniques depuis un avant pays archéen suivi d'un Archéen remanié jusqu'à des sédiments et ensuite des roches ophiolithiques de la ceinture Pan-Africaine du Mozambique. Malgré les déformations et le métamorphisme intenses qui les affectent, on reconnaît aussi dans les roches sédimentaires associées un changement coïncidant allant d'un continent à une marge continentale, à des conditions de plateforme et ensuite de mer profonde.

Краткое содержание

Описаны докембрийск ие отложения в западн ой части Кении, простирающиес я с запада на восток, в ко торых включены переотложившиеся по роды архея различного сос тава метаседименты д о офиолитовых пород включительно. В этих д окембрийских отложе ниях найдены породы разли чного происхождения, начин ая от пород континент альных, таковых континентал ьного склона, шельфа и морск их глубоководных сед иментов, причем некоторые из них сильно деформи рованы и метаморфизи рованы.

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Author notes

  1. Julian R. Vearncombe

    Present address: Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes, Buckinghamshire, UK

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    1. Julian R. Vearncombe
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    Vearncombe, J.R. A proposed continental margin in the precambrian of Western Kenya. Geol Rundsch 72, 663–670 (1983). https://doi.org/10.1007/BF01822087

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