Boron-rich mud volcanoes of the Black Sea region; modern analogues to ancient sea-floor tourmalinites associated with Sullivan-type Pb-Zn deposits?

Large submarine mud volcanoes in the abyssal part of the Black Sea south of the Crimean Peninsula are similar in many respects to synsedimentary mud volcanoes in the Mesoproterozoic Belt-Purcell basin. One of the Belt-Purcell mud volcanoes directly underlies the giant Sullivan Pb-Zn-Ag deposit in so...

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Bibliographic Details
Published in:Geology (Boulder) 1998-05, Vol.26 (5), p.439-442
Main Authors: Slack, John F, Turner, Robert J. W, Ware, Paul L. G
Format: Article
Language:English
Subjects:
Azov Sea
Black Sea
Black Sea region
boron
British Columbia
Canada
carbonates
Commonwealth of Independent States
Crimea Ukraine
deep-sea environment
East Mediterranean
Economic geology
enrichment
Europe
exhalative processes
geochemistry
Geology
hydrothermal vents
Kerch Peninsula
Krasnodar Russian Federation
lead-zinc deposits
marine environment
marine sediments
Mediterranean Sea
metal ores
metamorphic rocks
mineral deposits, genesis
modern analogs
Mount Sullivan Deposit
mud volcanoes
Oceanography
pyrite
rock, sediment, soil
Russian Federation
schists
SEDEX
Sediments
sulfides
sullivan-type deposits
Taman Peninsula
tourmalinite
Ukraine
Volcanoes
Western Canada
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Summary:Large submarine mud volcanoes in the abyssal part of the Black Sea south of the Crimean Peninsula are similar in many respects to synsedimentary mud volcanoes in the Mesoproterozoic Belt-Purcell basin. One of the Belt-Purcell mud volcanoes directly underlies the giant Sullivan Pb-Zn-Ag deposit in southeastern British Columbia. Footwall rocks to the Sullivan deposit comprise variably tourmalinized siltstone, conglomerate, and related fragmental rock; local thin pyrrhotite-rich and spessartine-quartz beds are interpreted as Fe and Fe-Mn exhalites, respectively. Analogous Fe- and Mn-rich sediments occur near the abyssal Black Sea mud volcanoes. Massive pyrite crusts and associated carbonate chimneys discovered in relatively shallow waters (∼200 m depth) west of the Crimean Peninsula indicate an active sea-floor-hydrothermal system. Subaerial mud volcanoes on the Kerch and Taman Peninsulas (∼100 km north of the abyssal mud volcanoes) contain saline thermal waters that locally have very high B contents (to 915 mg/L). These data suggest that tourmalinites might be forming in or near submarine Black Sea mud volcanoes, where potential may also exist for Sullivan-type Pb-Zn mineralization.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1998)026<0439:BRMVOT>2.3.CO;2