Comparison between the metasedimentary sequences of the Serra da Naquén and Serra Da Jacobina.
DOI:
https://doi.org/10.32685/0120-1425/bolgeol30.2.1989.250Keywords:
Colombia, seismic stratigraphy, Jacobina Group, Maimachi, deltaic environment, detrital gold, Serranía de Naquén
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Abstract
The Jacobina Group is the record of sediments deposited in a fluvial environment by meandering rivers and interbedded rivers flowing in an alluvial fan. The metaconglomerates contain detrital gold of sedimentary origin.
The Maimachi Formation records a deltaic environment where sediments deposited in tidal flats alternate with sediments left by meandering rivers. In this environment, interlaced rivers flowing in an alluvial fan were introduced, carrying a ruditic load within which traces of detrital gold have already been found.
The report recommends exploring with stratigraphic criteria in the Serranía de Naquén and the whole Maimachi Formation.
References
GALVIS, J. - Informe sobre la visita a la Serranía de Naquén (Guainía). Informe inédito presentado a ECOPETROL. Octubre de 1988.
MOSSMAN, O. J., OYER, B.O. - The Geochemistry of Witwatersrand-type gold deposits and the possible influence of ancient prokaryotic communities on gold dissolution and precipitation. Precambrian Research 30: 303-319, Amsterdam. 1985.
PRETORIUS, O.A. - Gold in proterozoic sediments of South Africa: Systems, paradigms, and models. In Wolf (editor) Handbook of strata-bound and stratiform ore deposits, Elsevier, Amsterdam, Oxford, New York, 1977a.
PRETORIUS, O.A. - The nature of the Witwatersand gold-uranium deposits. In: Wolf (ed.) Handbook of strata-bound and stratiform ore deposits, Elsevier, Amsterdam, Oxford, New York, 1977b.
SANTOS, J.O.S. - Exploraçao de ouro na Serra Naquén. Informe Inédito presentado a ECOPETROL. Octubre de 1988.
SIMS, J. F. - A Geología da série Jacobina aurífera nas vizinhanças da Jacobina; Bahía, Brasil. 1975.
