Skip to content

Research at St Andrews

Evolution of the Mozambique Belt in Malawi constrained by granitoid U-Pb, Sm-Nd and Lu-Hf isotopic data

Research output: Contribution to journalArticle

DOI

Open Access Status

  • Embargoed (until 29/11/19)

Abstract

U-Pb, Sm-Nd and Lu-Hf isotopic data for granitoid rocks from southern Malawi provide constraints on the timing and sources of magmatic activity within this segment of the Mozambique Belt and its role in the Rodinia and Gondwana supercontinent cycles. LA-ICP-MS single zircon U-Pb ages indicate a number of periods of magmatic activity: late Mesoproterozoic at ca. 1130 Ma, 1070 Ma, and 1050 to 1030 Ma; Neoproterozoic at ca. 960 Ma and 600 Ma; Cambrian at ca. 530 and 515 Ma, and Mesozoic at ca. 120 Ma. The oldest igneous activity, 1128 ± 30 Ma, corresponds with emplacement of a charnockitic granitoid in the southeast corner of Malawi (Mulanje area). This region subsequently experienced metamorphism dated at 515 ± 18 Ma. The youngest magmatism is alkaline in affinity and is associated with the East African Rift.

Radiogenic isotope data indicate that the Mesoproterozoic samples have positive ɛNd and ɛHf values, signifying derivation from material with a suprachondritic signature, whereas the younger rocks have negative values suggestive of crustal material recycling and mixing for their source and origins. The data imply that in the Malawi region of the Mozambique Belt, addition of new crust occurred during Rodinia assembly whereas magmatic activity during Gondwana assembly was restricted to reworking and mixing.
Close

Details

Original languageEnglish
JournalGondwana Research
VolumeIn press
Early online date29 Nov 2018
DOIs
Publication statusE-pub ahead of print - 29 Nov 2018

    Research areas

  • Mozambique Belt, Gondwana, Malawi, Metamorphism, Depleted mantle

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Generation and preservation of continental crust in the Grenville Orogeny

    Spencer, C. J., Cawood, P. A., Hawkesworth, C. J., Prave, A. R., Roberts, N. M. W., Horstwood, M. S. A. & Whitehouse, M. J., 1 May 2015, In : Geoscience Frontiers. 6, 3, p. 357-372 16 p.

    Research output: Contribution to journalArticle

  2. Intermontane basins and bimodal volcanism at the onset of the Sveconorwegian Orogeny, southern Norway

    Spencer, C. J., Roberts, N. M. W., Cawood, P. A., Hawkesworth, C. J., Prave, A. R., Antonini, A. S. M. & Horstwood, M. S. A., Oct 2014, In : Precambrian Research. 252, p. 107-118 12 p.

    Research output: Contribution to journalArticle

  3. Detrital zircon geochronology of the Grenville/Llano foreland and basal Sauk Sequence in west Texas, USA

    Spencer, C. J., Prave, A. R., Cawood, P. A. & Roberts, N. M. W., 1 Jul 2014, In : Geological Society of America Bulletin. 126, 7-8, p. 1117-1128 12 p.

    Research output: Contribution to journalArticle

  4. Proterozoic onset of crustal reworking and collisional tectonics: Reappraisal of the zircon oxygen isotope record

    Spencer, C. J., Cawood, P. A., Hawkesworth, C. J., Raub, T. D., Prave, A. R. & Roberts, N. M. W., May 2014, In : Geology. 42, 5, p. 451-454 4 p.

    Research output: Contribution to journalArticle

Related by journal

  1. From convergent plate margin to arc-continent collision: formation of the Kenting Mélange, southern Taiwan

    Zhang, X., Cawood, P. A., Huang, C-Y., Wang, Y., Yan, Y., Santosh, M., Chen, W. & Yu, M., Oct 2016, In : Gondwana Research. 38, p. 171-182 12 p.

    Research output: Contribution to journalArticle

  2. Thermo-mechanical controls of flat subduction: insights from numerical modeling

    Huangfu, P., Wang, Y., Cawood, P. A., Li, Z-H., Fan, W. & Gerya, T. V., Dec 2016, In : Gondwana Research. 40, p. 170-183 14 p.

    Research output: Contribution to journalArticle

  3. Detrital zircon evidence for the reactivation of an Early Paleozoic syn-orogenic basin along the North Gondwana margin in South China

    Yu, W., Du, Y., Cawood, P. A., Xu, Y. & Yang, J., Sep 2015, In : Gondwana Research. 28, 2, p. 769-780

    Research output: Contribution to journalArticle

ID: 257287855