Louis Taylor Nel, geologist, was the eldest son of Reverend Paul Nel and his wife Mabel Agnes May Taylor. He matriculated at the Ermelo High School, Mpumalanga (through the University of the Cape of Good Hope) in 1915 and continued his studies at the University of Stellenbosch where he graduated as Bachelor of Science (BSc, 1919) and Master of Science in geology (MSc, 1920, with distinction). In October 1920 he assumed duty in Pretoria as a junior geologist in the Geological Survey of the Department of Mines, where he spent his entire career. In 1927 he was awarded the Degree Doctor of Science (DSc) by the University of Stellenbosch with a thesis on The geology of the country around Vredefort, and with Professor S. J. Shand* as promoter. His thesis appeared as a well-known special publication of the Geological Survey. Three years later he went to Germany for specialized training in mineralogy and ore microscopy at the University of Freiburg, in Breisgau. and in structural geology at the University of Bonn. He returned to the Geological Survey in 1932 with the rank of geologist and rose to assistant director (1935), acting director (1944) and director (1948), holding the latter position until his retirement in February 1955.

Nel's research consisted initially of the detailed geological mapping of the Witwatersrand System and associated geological formations around Balfour and Greylingstad and from there westwards to the Vaal Dam, and later in the regions Parys to Vredefort, Ventersdorp to Klerksdorp and Odendaalsrus. He was able to correlate the Witwatersrand System as it occurs in these regions in detail with its typical appearance on the Rand and reported his findings in several reports during 1934-1935. The quality of his work earned him an international reputation as an expert on particularly the Witwatersrand System and Vredefort Dome. After the discovery of manganese ore near Postmansburg he made a detailed study of the complex geological structure of this region and described it in Geological map of the Postmansburg manganese deposits (1929). Among others he identified the sedimentary Gamagara Formation, which includes the iron mineralization at Sishen, and described two new minerals, zunyite and diaspore. When working in the Klerksdorp area he identified the Dominion Reef Series (now the Dominion Reef Group) as a distinct unit underlying the Witwatersrand strata and demonstrated the unconformable relationship between the upper and lower Witwatersrand System. The results of his work were published in a number of reports and papers that reflect the exceptional thoroughness of his observations and interpretations. His pioneering work later led to developments of great economic importance when the goldfields of the Witwatersrand were expanded westwards to Klerksdorp and southwards into the Free State and in the exploitation of the iron ore deposits at Sishen and the northwards expansion of the Postmansburg manganese fields. In 1948 and 1952 he attended the International Geological Congresses in England and Algeria respectively. In Algeria he presented "Notes on correlation of the geological formations in the Union of South Africa and South west Africa" [now Namibia].

After his retirement in 1955 Nel was appointed as consulting geologist of the Atomic Energy Board, a position he held until his death. In this position he participated in the study of uranium deposits in the gold-bearing strata of the Witwatersrand System and in surveys of the strategic mineral resources of the country. He reported to the Atomic Energy Board on nuclear reactor materials other than nuclear fuels (1965) and on ore deposits of beryllium (1965) and lithium (1968) in South Africa and South West Africa.

The quality of his work was widely recognized. In 1929, when the International Geological Congress was held in South Africa, he was recognized as the most promising young South African geologist through the award of the Prix Spendiaroff (Spendiaroff Prize). He was a member (from 1920) and later an honorary member (from 1960) of the Geological Society of South Africa, served on its council from 1937 to 1964 and as its president in 1932. His presidential address dealt with the Witwatersrand System outside the Rand. In 1943 he was awarded the society's Draper Memorial Medal. He was also a Fellow of the Geological Society of London from 1936 to 1966. In 1955 he received the Havenga Prize in the natural sciences and technology (division engineering and geology) of the Suid-Afrikaanse Akademie vir Wetenskap en Kuns, having been elected a member in 1944. He was a member, and from 1956 a life member, of the South African Association for the Advancement of Science. At various times he was a member of the boards of the Fuel Research Institute and the Transvaal Museum, and served on the Management Committee of the Government Metallurgical Laboratory. He was also chairman of the Terminology Committee of the Geological Survey and guided the compilation of a bilingual vocabulary of geological and allied terms.

Nel was an unassuming and well-liked person and an enthusiastic sportsman in his earlier years. In 1928 he married Johanna Adriana du Preez. In 1932 he married Muriel Isabella Malherbe. He had two sons and a daughter.

List of sources:

Anhaeusser, C. R. (ed.) A century of geological endeavour in southern Africa, 1895-1995. Johannesburg: Geological Society of South Africa, 1997.

Council for Geoscience. Catalogue of publications of the Geological Survey and government publications on the earth sciences (Compiled by R. R. M. Price). Pretoria: Council for Geoscience, 1997.

Dictionary of South African Biography, Vol. 4, 1981.

FamilySearch: Louis Taylor Nel. https://ancestors.familysearch.org/en/G3MG-9HJ/louis-taylor-nel-1895

Hall, A. L. A bibliography of South African geology. Pretoria: Geological Survey, Memoirs No. 25 (1927), 27 (1931) and 30 (1937).

Havengaprys in die Natuurwetenskappe en Tegniek, Afdeling Ingenieurswese en Geologie, 1955, Toegeken aan Dr. L. T. Nel. Tydskrif vir Wetenskap en Kuns, 1955, Vol. 15(2), pp. 11-12.

Hugo, P. J., Schalk, K. E. L. and Barnes, S. J. Bibliography of South West African / Namibian Earth Science. Windhoek: Geological Survey [of Namibia], 1983.

Louis Taylor Nel. Prabook. Retrieved on 14 February 2022 from https://prabook.com/web/louis_taylor.nel/1106089

Pretorius, D. A. The depositional environment f the Witwatersrand goldfields; a chronological review of speculations and observations. Minerals Science and Engineering, 1975, Vol. 7(1), pp. 18-47.

Roux, A. J. A. [Obituary]Dr Louis Taylor Nel. In: Suid-Afrikaanse Akademie vir Wetenskap en Kuns. Jaarboek, 1968, pp. 88-89.

Union catalogue of theses and dissertations of South African Universities, 1918-1984. Microfiche copy, University of South Africa.

University of the Cape of Good Hope. Calendar, 1917/1918. Matriculation examination.

Compiled by: C. Plug

Last updated: 2025-05-30 10:09:29