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Geologische Rundschau

, Volume 76, Issue 2, pp 539–565 | Cite as

Lithostratigraphic subdivision of the Karoo rocks of the Luwegu Basin (Tanzania) and their biostratigraphic classification based on microfloras, macrofloras, fossil woods and vertebrates

  • Otfried Hankel
Article

Abstract

For the first time a comprehensive stratigraphic classification of the Karoo deposits of the Luwegu Basin in southern Tanzania is presented. The Karoo strata attain a total thickness of almost 6000 metres and are composed of deltaic-lacustrine and fluvial deposits. The sedimentary sequence has been subdivided into nine major lithostratigraphic units. The results of biostratigraphic investigations (microfloras, macrofloras, fossil woods, vertebrates) indicate, that the Karoo Sequence ranges in age from Upper Permian to Lower Jurassic. The palynological sequence comprises microfloras of the Upper Permian, the Upper Triassic (Onslow and Ipswich type) and the Lower Jurassic. Their age is assessed from correlation with palynofloras of Malagasy, Australia and Zimbabwe. Resulting from this regional as well as intercontinental correlations with the Karoo strata of East and South Africa, the Karoo-type strata of North Africa and the Gondwana sequences of Australia and India can be proposed. Furthermore on the base of radiometric datings of hitherto unknown occurrences of volcanic rocks a Karoo volcanism and an Early Tertiary volcanism can be distinguished.

Keywords

Gondwana Lower Jurassic Lithostratigraphic Unit Fossil Wood Sequence Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Zusammenfassung

Erstmalig wird eine umfassende stratigraphische Gliederung der Karoo-Ablagerungen des Luwegu-Beckens im südlichen Tansania vorgestellt. Die Karoo-Abfolge erreicht eine Gesamtmächtigkeit von nahezu 6000 Metern und setzt sich aus deltaisch-lakustrinen und fluviatilen Ablagerungen zusammen. Die Karoo-Ablagerungen werden in neun grö\ere lithostratigraphische Einheiten untergliedert. Die Ergebnisse biostratigraphischer Untersuchungen (Mikrofloren, Makrofloren, fossile Hölzer, Vertebraten) zeigen, da\ die Karoo-Sequenz vom oberen Perm bis m den unteren Jura reicht. Die palynologische Abfolge umfa\t Mikrofloren des oberen Perms, der oberen Trias (Onslow- und Ipswich-Typ) und des unteren Jura, deren Alter durch Vergleiche mit Palynofloren von Madagaskar, Australien und Simbabwe festgelegt ist. Für die Karoo-Ablagerungen des Luwegu-Beckens ergeben sich hieraus regionale wie auch überregionale Korrelationsmöglichkeiten mit den Karoo-Sequenzen von Ost- und Südafrika, den Karoo-ähnlichen Ablagerungen Nordafrikas und den Gondwana-Abfolgen von Australien und Indien. Darüber hinaus kann anhand von radiometrischen Datierungen an Vulkaniten ein Karoo-Vulkanismus und ein alttertiärer Vulkanismus nachgewiesen werden.

Résumé

L'auteur présente une classification stratigraphique générale médite des sédiments du Karoo du Bassin de Luwegu en Tanzanie méridionale. La série du Karoo y atteint une épaisseur totale de près de 6000 m et est composée de dépÔts deltaÏques, lacustres et fluviatiles. Ces sédiments ont été subdivisés en neuf unités lithostratigraphiques majeures. Les investigations biostratigraphiques (microflore, macroflore, bois fossiles, vertébrés) prouvent que la série du Karoo s'étend du Permien supérieur au Jurassique inférieur. La séquence palynologique comprend des microflores du Permien supérieur, du Trias supérieur (type Onslow et Ipswich) et du Jurassique inférieur dont les âges sont déterminés par comparaison avec les palynoflores de Madagascar, d'Australie et du Zimbabwe. Il est donc possible d'établir des corrélations régionales et intercontinentales entre le Karoo du Bassin de Luwegu d'une part et le Karoo de l'Afrique orientale et méridionale, les sédiments analogues de l'Afrique du Nord et les séries Gondwana de l'Australie et de l'Inde. De plus, la datation radiométrique de produits volcaniques non signalées jusqu'ici a permis de mettre en évidence un volcanisme Karoo et un volcanisme du Tertiaire inférieur.

кРАткОЕ сОДЕРжАНИЕ

ВпЕРВыЕ пРИВОДИтсь п ОДРОБНОЕ стРАтИгРАФ ИЧЕскОЕ РАсЧлЕНЕНИЕ ОтлОжЕН ИИ Karoo В БАссЕИНЕ Luwegu, тАНжАНИь. МОЩНОсть сВ Ит Karoo ДОстИгАЕт пОЧтИ 6000 М, И ОНИ сОстАВлЕНы ДЕ льтО-ОжЕРНыМИ ОтлОжЕ НИьМИ, кОтОРыЕ пОДРАжДЕльУ т НА 9 кРУпНых лИтОстРАтИгРАФИЧЕс кИх ЕДИНИц. БИОстРАтИгРА ФИЧЕскИМИ ИсслЕДОВАНИьМИ — МИк РОФлОРы, МАкРОФлОРы, ФОссИльНыЕ ДРЕВЕсИН ы, пОДВОНОЧНыЕ — УстАН ОВИлИ, ЧтО сВИты Karoo ОтлАгАлИс ь жДЕсь В пЕРИОД От ВЕР хНЕИ пЕРМИ ДО НИжНЕИ УРы. с п ОМОЩьУ пАлИНОлОгИЧЕ скИх ИсслЕДОВАНИИ УстАНО ВИлИ МИкРОФлОРУ, ОтНО сьЩУУсь к ВЕРхНЕИ пЕРМИ, ВЕРхН ЕМУ тРИАсУ — тИпы Onslow И Ipshwich —, А тАкжЕ НИжНЕИ УР ы; ОпРЕДЕлЕНИЕ ВОжРАстА пРОВЕлИ НА О сНОВАНИИ сРАВНЕНИь с ФлОРОИ МАДАгАскАРА, АВстРАл ИИ И жИМБАБВЕ. т. О. ИМЕЕтсь ВОжМОжНОсть кОРРЕлИРОВАть ОтлОж ЕНИь Karoo В БАссЕИНЕ Luwegu НЕ тОлькО РЕгИОНАльНО, НО И жА пРЕДЕлАМИ РЕгИОНА сО сВИтАМИ Karoo ВОстОЧНО И И УжНОИ АФРИкИ И ИМ пОДО БНыМИ ОтлОжЕНИьМИ сЕ ВЕРНОИ АФРИкИ И гОНДВАНскИМ И сВИтАМИ АВстРАлИИ И ИНДИИ. кРОМЕ тОгО, с пО МОЩьУ РАДИОМЕтРИЧЕс кИх МЕтОДОВ ИсслЕДОВАНИ ь ВУлкАНИтОВ УДАлОсь УстАНОВИть ВУлкАНИжМ, кАк В пЕРИО ДЕ Karoo, тАк И В РАННЕМ тРЕтИЧНОМ пЕРИОДЕ.

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References

  1. Anderson, H. M. (1974): A brief review of the flora of the Molteno Formation (Triassic), South Africa. - Palaeont. Afr.,17, 1–10.Google Scholar
  2. Anderson, J. M. (1977): The biostratigraphy of the Permian and Triassic. Part 3. A review of Gondwana Permian palynology with particular reference to the northern Karroo Basin, South Africa. - Mem. bot. Surv. S. Afr.,41.Google Scholar
  3. Attims, Y. (1965): Etude anatomique et paleogeographique de quelques bois du Maroc. - Notes et Mem. Serv. Geol. Maroc, 183,24, 33–52.Google Scholar
  4. Birch, R. L. &Stephens, E. A. (1962): Quarter degree sheet 251, Mahenge, scale 1:125000, with a brief explanation of the geology. - Map geol. Surv. Tanganyika, G.S. 2018, D.O.S. (Geol.) 1130.Google Scholar
  5. Bond, G. (1973): The palaeontology of Rhodesia. - Bull. geol. Surv. Rhodesia,70.Google Scholar
  6. Boonstra, L. D. (1953a): A note on some Rhynchosaurian remains from Tanganyika Territory. - Ann. S. Afr. Mus.,42, 1–4.Google Scholar
  7. — (1953b): A report on a collection of fossil reptilian bones from Tanganyika Territory. - Ann. S. Afr. Mus.,42, 5–18.Google Scholar
  8. Bornhardt, W. (1900): Zur Oberflächengestaltung und Geologie Deutsch-Ostafrikas. - Deutsch-Ost-Afrika,7, 595 pp., Berlin (Dietrich Reimer).Google Scholar
  9. Bristow, J. W. &Saggerson, E. P. (1983): A general account of Karoo vulcanicity in southern Africa.- Geol. Rdsch.,72, 1015–1060, Stuttgart.Google Scholar
  10. Cox, K. G., McDonald, R. &Hornung, G. (1967): Geochemical and petrographic provinces in the Karoo basalts of southern Africa. - Am. Miner.,52, 1451–1474.Google Scholar
  11. Dantz, A. (1902): Die Reisen des Bergassessors Dr. Dantz in Deutsch-Ostafrika in den Jahren 1898, 1899 und 1900. - Mitt. Forsch. Reis. Gelehrt. dt. Schutzgeb.,15, 34–242.Google Scholar
  12. Dolby, J. H. &Balme, B. E. (1976): Triassic palynology of the Carnarvon Basin, western Australia. - Rev. Palaeobot. Palynol.,22, 105–168.Google Scholar
  13. Duncan, A. R. &Erlank, A. J. (1979): Regional geochemistry of the Karoo volcanics. - Abstr. 18th Cong. Geol. Soc. S. Afr., Geokong.,79, 128–131.Google Scholar
  14. Falcon, R. M. S. (1973): Palynology of the lower Karoo succession in the Middle Zambezi Basin. - Bull. geol. Surv. Rhodesia,70, 43–71.Google Scholar
  15. — (1975a): Application of palynology in subdividing the coal-bearing formations of the Karoo Sequence in southern Africa. - S. Afr. J. Sc.,71, 336–344.Google Scholar
  16. — (1975b): Palyno-Stratigraphy of the lower Karoo Sequence in the central Sebungwe District, Mid-Zambezi Basin, Rhodesia. - Palaeont. Afr.,18, 1–29.Google Scholar
  17. Filatoff, J. (1975): Jurassic palynology of the Perth Basin, Western Australia. - Palaeontographica, B154, 1–113.Google Scholar
  18. Furon, R. (Edit.) (1957): Lexique stratigraphique international, Afrique, Tanganyika. - Centre National de la Recherche Scientifique,4, 8c.Google Scholar
  19. Gillman, C. (1944): The geography and hydrography of the Tanganyika Territory part of the Ruvuma Basin. - Water consult. rep.,5, Dar es Salaam (Government Printer).Google Scholar
  20. Giraud, B. &Hankel, O. (1985): Bois fossiles des depots du Karoo du Bassin du Luwegu (Tanzanie meridionale). - Ann. Paleont.,71, 3, 159–185, Paris.Google Scholar
  21. —,— (1986): Nouveaux bois fossiles de Gymnospermes des depots du Karoo du Bassin du Luwegu (Tanzanie meridionale). - Ann. Paleont.,72, 1, 1–27, Paris.Google Scholar
  22. Gothan, W. (1927): Fossile Pflanzen aus den Karru-Schichten der Umgebung des Uluguru-Gebirges in Deutsch-Ostafrika. - In: Wissenschaftliche Ergebnisse der Tendaguru-Expedition, 1909–1912. Plaeontographica, N.F., Supplement,7, 2, 1, 143–152.Google Scholar
  23. Goubin, N. (1965): Description et repartition des principaux pollenites Permiens, Triassiques et Jurassiques des sondages du Bassin de Morondava (Madagascar). - Revue de l'Inst. Francais du Petr.,20, 10, 1415–1461.Google Scholar
  24. Haldemann, E. G. 1962): The geology of the Rufiji Basin with reference to proposed dam sites. - Bull. geol. Surv. Tanganyika,33.Google Scholar
  25. Hankel, O. &Lejal-Nicol, A. (1981): Sur la paleoflore des formations mesozoiques continentales du Bassin du Luwegu (Tanzanie meridionale). - C. R. Acad. Sc. Paris,293, 2, 525–528.Google Scholar
  26. Hart, G. F. (1967a): Micropalaeontology of the Karroo deposits in South Africa and Central Africa. - I.U.G.S. Symp. Gondwana Stratigr., Buenos Aires, Earth Sciences,2, 37–38.Google Scholar
  27. — (1967b): The stratigraphic subdivision and equivalents of the Karroo Sequence as suggested by palynology.- I.U.G.S. Symp. Gondwana Stratigr., Buenos Aires, Earth Sciences,2, 23–32.Google Scholar
  28. Haughton, S. H. (1936): On some Karroo fishes from East Africa. - Quart. J. geol. Soc. London,92, 58–61.Google Scholar
  29. Irvine, T. N. &Baragar, W. R. A. (1971): A guide to the chemical classification of the common volcanic rocks. - Canad. J. Earth Sc.,8, 523–548.Google Scholar
  30. James, T. C. (1953): An occurrence of carbonatite at Maji ya Weta Hill, Morogoro District. - Rec. geol. Surv. Tanganyika,3, 29–31.Google Scholar
  31. Janensch, W. (1927): Beitrag zur Kenntnis der Karru-Schichten im östlichen Deutsch-Ostafrika. - in: Wissenschaftliche Ergebnisse der Tendaguru-Expedition, 1909–1912. Palaeontographica, N.F., Suppl.,7, 2, 1, 107–142.Google Scholar
  32. Keyser, A. W. (1973): A preliminary study of the type area of the Cistecephalus zone of the Beaufort Series, and a revision of the anomodont family Cistecephalidae. - Mem. geol. Surv. S. Afr.,62, 1–71.Google Scholar
  33. Klitzsch, E. (1984): Northwestern Sudan and bordering areas: Geological development since Cambrian time. - Berliner geowiss. Abh., A50, 23–45.Google Scholar
  34. — &Lejal-Nicol, A. (1984): Flora and fauna from strata in southern Egypt and northern Sudan. - Berliner geowiss. Abh., A50, 47–79.Google Scholar
  35. Kögler, K., Bianconi, F. &Büttner, W. (1983): Geochemical behaviour of uranium in lateritic profiles in southern Tanzania. - In: Uranium exploration in wet tropical environments. Intern. Atomic Energy Agency, 119–135. Wien.Google Scholar
  36. Krenkel, E. (1925): Geologie Afrikas.1, 461 pp., Berlin (Gebrüder Bornträger).Google Scholar
  37. Kreuser, Th. (1983): Stratigraphie der Karroo-Becken in Ost-Tanzania (unter besonderer Berücksichtigung potentieller Kohlenwasserstoffträger). - Diss. Univ. Köln, Sonderveröffentlichung,45.Google Scholar
  38. Kumaran, K. P. N. &Maheshvari, H. K. (1980): Upper Triassic sporae dispersae from the Tiki Formation. 2. Miospores from the Janar Nala section, South Rewa Gondwana Basin, India. - Palaeontographica, B173, 26–84.Google Scholar
  39. Lejal-Nicol, A. (1983): Fossil plants from Karoo rocks of the Luwegu Basin (Tanzania). - Unpubl. rep., Inst. de Paleobot., Univ. P. et M. Curie, Paris.Google Scholar
  40. Lieder, G. (1894): Beobachtungen auf der Ubena-Nyasa-Expedition, 11. November 1893 bis 30. März 1894. - Mitt. Forsch. Reis. Gelehrt. dt. Schutzgeb.,7, 271–277.Google Scholar
  41. Maheshwari, H. K. &Kumaran, K. P. N. (1979): Upper Triassic sporae dispersae from the Tiki Formation. 1. Miospores from the Son river section between Tharipathar and Ghiar, South Rewa Gondwana Basin. - Palaeontographica, B171, 137–164.Google Scholar
  42. Martin, H. (1982): Die Trias im südlichen Afrika. - Geol. Rdsch.,71, 937–947, Stuttgart.Google Scholar
  43. McDonald, R. (1967): Geochemical and petrographic provinces of Karoo basalts. - Proc. Geol. Soc. London,1637, 44–45.Google Scholar
  44. McKinlay, A. C. M. (1960): The Inland Sedimentary Plateau of the Ulanga District. - Rec. geol. Surv. Tanganyika,8, 17–27.Google Scholar
  45. Mennell, F. P. (1930): The Karroo System in East and Central Africa. - XV. Int. Geol. Congr. 1929,3, 29, 263–287, Pretoria.Google Scholar
  46. Moore, W. R. (1961): Geological notes on Quarter Degree Sheets 256/256E, Kilwa, and 255, Njinjo, Southern Region. - Rec. geol. Surv. Tanganyika,11, 21–31.Google Scholar
  47. Odin, G. S., Curry, D., Gale, N. H. &Kennedy, W. J. (1982): The Phanerozoic time scale in 1981. - In:Odin, G. S. (Edit.): Numerical dating in stratigraphy. - 957–960, New York (John Wiley & Sons).Google Scholar
  48. Pareek, H. S. (1967): Some observations on the lithology of coal-bearing beds and the nature of coal of the major Gondwana Basins of India. - In: Gondwana Stratigraphy. - IUGS Symp. Buenos Aires 1967. Earth Sciences,2, 883–903.Google Scholar
  49. Playford, G. &Dettmann, M. E. (1965): Rhaeto-Liassic plant microfossils from the Leigh Creek Coal Measures, South Australia. - Senckenberg. Lethaea,46, 127–181.Google Scholar
  50. Plumstead, E. P. (1969): Three thousand million years of plant life in Africa. - Alex. L. du Toit Memorial Lecture, Annexure Trans. geol. Soc. S. Afr.,11, 1–72.Google Scholar
  51. Potonie, H. (1900): Fossile Pflanzen aus Deutsch- und Portugiesisch-Ostafrika. - Deutsch-Ost-Afrika,7, 495–513, Berlin (Dietrich Reimer).Google Scholar
  52. Quennell, A. M.,McKinlay, A. C. M.,Aitken, W. G. (1956): Summary of the geology of Tanganyika. 1. Introduction and Stratigraphy. - Mem. geol. Surv. Tanganyika,1.Google Scholar
  53. Sacs (South African Committee For Stratigraphy) (1980): Stratigraphy of South Africa. Pan 1. Lithostratigraphy of the Republic of South Africa, South West Africa/Namibia, and the Republics of Bobhuthatswana, Transkei and Venda. - Handbook geol. Surv. S. Afr.,8.Google Scholar
  54. Scholz, E. (1914): Beiträge zur Geologie des südlichen Teiles Deutsch-Ostafrikas. - Mitt. dt. Schutzgeb.,27, 49–67.Google Scholar
  55. Smith, A. G.,Briden, J. C. &Drewry, G. E. (1973): Phanerozoic world maps. -In:Hughes, N. F. (Edit.): Organisms and continents through time. - Palaeontol. Soc. London, Spec. Pap.,12, 1–42.Google Scholar
  56. Spence, J. (1955a): Quarter degree sheet 64 SE, Mkalinzo, Scale 1∶125000. - Map geol. Surv. Tanganyika, G.S. 911.Google Scholar
  57. - (1955b): Quarter degree sheet 74 NE, Mawera, Scale 1∶125000. - Map geol. Surv. Tanganyika, G.S. 876.Google Scholar
  58. - (1955c): Quarter degree sheet 74 SW, Luwegu, Scale 1∶125000. -Map geol. Surv. Tanganyika, G.S. 923.Google Scholar
  59. - (1956): Geology of the western part of the Matumbi Hills. - Confid. rep. to BP-Shell Petr. Dev. Comp. Tanganyika Ltd.Google Scholar
  60. - (1957): The geology of part of the Eastern Province of Tanganyika. - Bull. geol. Surv. Tanganyika,28.Google Scholar
  61. Steiger, R. H. &Jäger, E. (1977): Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. - Earth and Planetary Sc. Lett.,36, 359–362.Google Scholar
  62. Stockley, G. M. &Oates, F. (1931): The Ruhuhu Coalfields, Tanganyika Territory. - Min. Mag.,45, 73–91.Google Scholar
  63. - (1932): Karroo geology. The Rufiji-Luwegu-traverse. - Rep. geol. Surv. Tanganyika, 1931, 10–11.Google Scholar
  64. — (1936): A further contribution on the Karroo rocks of Tanganyika Territory. - Quart. J. geol. Soc. London,92, 1–31.Google Scholar
  65. — (1943): The geology of the Rufiji District, including a small portion of Northern Kilwa District (Matumbi Hills). - Tanganyika Notes and Records,16, 7–28.Google Scholar
  66. — (1947a): New coal discoveries in Tanganyika. - Min. Mag.,76, 329–338.Google Scholar
  67. — (1947b): The geology and mineral resources of Tanganyika Territory. - Bull. imp. Inst. London,45, 375–406.Google Scholar
  68. Streckeisen, A. (1978): Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks.- N. Jb. Miner. Abh.,134, 1–14.Google Scholar
  69. — (1980): Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks. IUGS Subcommission on the systematics of igneous rocks. - Geol. Rdsch.,69, 194–207.Google Scholar
  70. Teale, E. O. (1922): Geological Survey of Tanganyika Territory. Final report with guide map to specimens. - Geol. Surv. Tanganyika, 1–41.Google Scholar
  71. - (1933): Provisional geological map of Tanganyika with explanatory notes. - Bull. geol. Surv. Tanganyika,6.Google Scholar
  72. Thomson, J. (1881): To the Central African lakes and back. - London (Sampson, Low, Marston, Searle and Rivington).Google Scholar
  73. Wade, F. B. (1937): A stratigraphical classification and table of Tanganyika Territory. - Bull. geol. Surv. Tanganyika,9.Google Scholar
  74. Walters, R. &Linton, R. E. (1973): The sedimentary basin of coastal Kenya. - In: Bassins Sediment. Littoral Afr. - 2. Littoral Austral. Oriental. Symp., Montreal 1972, Paris Assoc. Serv. Geol. Afr., 133–158.Google Scholar
  75. Yoder, H. S. &Tilley, C. E. (1962): Origin of basalt magmas: an experimental study of natural and synthetic rock systems. - J. Petrol.,3, 342–532.Google Scholar

Copyright information

© Ferdinand Enke Verlag Stuttgart 1987

Authors and Affiliations

  • Otfried Hankel
    • 1
  1. 1.Geologisch-Paläontologisches InstitutJustus-Liebig-Universität Gie\enGie\en

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