Authigenic pyrite and gypsum in South West African continental slope sediments

@article{Siesser1976AuthigenicPA,
  title={Authigenic pyrite and gypsum in South West African continental slope sediments},
  author={William G. Siesser and J. Rogers},
  journal={Sedimentology},
  year={1976},
  volume={23},
  pages={567-577}
}
An unusual association of authigenic pyrite and authigenic gypsum has been found in silty clays recovered from the South West African continental slope. Nannofossil content suggests that the sediments are Upper Miocene-Lower Pliocene in age. Pyrite occurs as (1) granular masses, (2) ‘worm’tubes, (3) foraminiferal infillings, and (4) framboids. Gypsum occurs as euhedral single or twinned crystals of selenite. ‘Worm’tubes and foraminiferal infillings of pyrite are partially or completely… 
Authigenic gypsum in marine sediments
FALKLAND PLATEAU OCCURRENCES Host Lithology
Authigenic gypsum, pyrite, and glauconite are disseminated throughout an unusually long (346 m) Miocene section of mixed biogenic carbonate and diatomaceous ooze drilled on the Falkland Plateau at
Authigenic Gypsum in Gas‐Hydrate Associated Sediments from the East Coast of India (Bay of Bengal)
Authigenic gypsum crystals, along with pyrite and carbonate mineralization, predominantly calcites were noticed in distinct intervals in a 32 m long piston core, collected in the gas hydrate‐bearing
Diagenetic formation of gypsum and dolomite in a cold‐water coral mound in the Porcupine Seabight, off Ireland
Authigenic gypsum was found in a gravity core, retrieved from the top of Mound Perseverance, a giant cold‐water coral mound in the Porcupine Basin, off Ireland. The occurrence of gypsum in such an
Authigenic gypsum found in gas hydrate-associated sediments from Hydrate Ridge, the eastern North Pacific
Characteristic gypsum micro-sphere and granular mass were discovered by binocular microscope in the gas hydrate-associated sediments at cores SO143-221 and SO143/TVG40-2A respectively on Hydrate
Quaternary iron‐manganese deposits and associated pelagic sediments (radiolarian clay and chert, gypsiferous mud) from the Tyrrhenian Sea
Various types of pelagic sediments occur on a dolomitic basement located at some 1000 m depth on the eastern slope of the Tyrrhenian Sea, i.e. in the most internal, collapsed and presently submerged
FACTORS CONTROLLING THE RECENT SEDIMENTATION IN THE UPPER CONTINENTAL SLOPE OF THE JACUÍPE BASIN ( NE BRAZIL )
This work is based on textural, mineralogical (XRD) and compositional data of 50 bottom sediments’ samples in the upper continental slope between 80-1000 m water depth of the Jacuípe Basin, northern
Mineralogia autigênica em sedimentos quaternários da bacia de Santos: evidências de emanações de metano no Oceano Atlântico Sudoeste
An association of authigenic pyrite and gypsum has been found in deep-sea sediments from a core retrieved on the continental slope of the Santos Basin, South Atlantic. Pyrite occur mainly as tubular
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 11 REFERENCES
Continental Breakup and the Development of Post-Paleozoic Sedimentary Basins around Southern Africa
Since Paleozoic time, the development of sedimentary basins on the continental margin of southern Africa has been controlled by the structures formed during the breakup of Gondwanaland. In
An occurrence of gypsum in southwest Texas
ABSTRACT Gypsum in the form of crystals and rosettes of selenite has been found in subsurface clays and sands of the Laguna Madre mudflats of southwest Texas. The habit of the crystals is unusual,
MICRO-ORGANIC MATERIAL WITH DIAGENETIC PYRITE FROM THE LOWER PROTEROZOIC MOUNT ISA SHALE AND A CARBONIFEROUS SHALE
Summary Forms of organic material already known to be associated with first generation pyrite grains in the Mount Isa Shale (Lower Proterozoic, Queensland, Australia) are explained by reference to
Mircro-organisms and the presence of syngenetic pyrite
  • L. G. Love
  • Geology
    Quarterly Journal of the Geological Society of London
  • 1957
Summary Certain beds of the Scottish Lower Carboniferous Oil Shale Group contain numerous small granules of pyrite. Isolation and subsequent solution of this pyrite has revealed the presence of a
Selenite crystals in the clays of Great Salt Lake [Utah]
ABSTRACT Selenite crystals 2 to 6 inches in length have recently been found in a few places around the shores of Great Salt Lake in the soft sodium clays of the lake bottom. This occurrence may be
Stability Fields of Iron Minerals in Anaerobic Marine Sediments
The pH of anaerobic marine sediments is in general constant relative to $$pS^{--} (-log as--)$$. Consequently, the two-dimensional representation of the stability fields of authigenic iron minerals
The origin of framboids
...
1
2
...