Carbonic fluid inclusions in Paleoproterozoic carbonate-hosted Zn-Pb deposits in Griqualand West, South Africa

Huizenga, Jan Marten, Gutzmer, Jens, Greyling, Lynnette, and Schaefer, Markus (2006) Carbonic fluid inclusions in Paleoproterozoic carbonate-hosted Zn-Pb deposits in Griqualand West, South Africa. South African Journal of Geology, 109 (1-2). pp. 55-62.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website:


This paper reports the discovery of carbonic CH4-dominated fluid inclusions in two carbonate-hosted zinc-lead deposits in Griqualand West, South Africa. The primary carbonic inclusions were identified in coarse crystalline quartz of the main mineralisation stages at the Pering and Bushy Park deposits, hosted by Neoarchean dolostones of the Campbellrand Subgroup of the Transvaal Supergroup. The composition of the carbonic inclusions was determined from their low temperature phase behaviour during microthermometry and was confirmed with Raman microspectometry. It provides evidence for the presence of a highly reactive reducing agent (CH4) that may have been important during the mineralisation process. The carbonic inclusions and their coexistence with saline aqueous fluid inclusions allow the determination of the fluid temperature (200 to 240°C) and pressure (0.8 to 1.5 kbar) during mineralisation, suggesting that ore formation took place at 2.8 to 4.8 km depth under lithostatic pressure conditions. This is deeper than widely believed for Mississippi Valley-Type deposits, with which the Pering and Bushy Park deposits show many similarities.

Item ID: 30679
Item Type: Article (Research - C1)
ISSN: 1996-8590
Funders: University of Johannesburg, Billiton South Africa, Jim and Gladys Taylor Education Trust Fund, Netherlands Organisation for the Advancement of Pure Research (NWO)
Date Deposited: 29 Nov 2016 03:27
FoR Codes: 04 EARTH SCIENCES > 0402 Geochemistry > 040299 Geochemistry not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 80%
84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840108 Zinc Ore Exploration @ 20%
Downloads: Total: 1
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page