scholarly journals Stromatolites and calcitized evaporite in a hypersaline playa lake: Rossport Formation (Mesoproterozoic, Ontario)

2021 ◽  
Author(s):  
Julie K. Bartley ◽  
Sydney Firmin ◽  
John T. Berger
Keyword(s):  
Playa Lake

Bacterial Succession within an Ephemeral Hypereutrophic Mojave Desert Playa Lake

2008 ◽  
Vol 57 (2) ◽  
pp. 307-320 ◽  
Author(s):  
Jason B. Navarro ◽  
Duane P. Moser ◽  
Andrea Flores ◽  
Christian Ross ◽  
Michael R. Rosen ◽  
...  
Keyword(s):  
Mojave Desert ◽  
Bacterial Succession ◽  
Playa Lake

OIL GEOCHEMISTRY AND POTENTIAL SOURCE ROCKS OF THE OFFICER BASIN, SOUTH AUSTRALIA

1980 ◽  
Vol 20 (1) ◽  
pp. 68 ◽  
Author(s):  
D.M. McKirdy ◽  
A.J. Kantsler
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Carbonate Rocks ◽  
Depositional Environment ◽  
South Australia ◽  
Source Rocks ◽  
Potential Source ◽  
Playa Lake ◽  
Oil Source ◽  
Extractable Organic Matter

Oil shows observed in Cambrian Observatory Hill Beds, intersected during recent stratigraphic drilling of SADME Byilkaoora-1 in the Officer Basin, indicate that oil has been generated within the basin. Shows vary in character from "light" oils exuding from fractures through to heavy viscous bitumen in vugs in carbonate rocks of a playa-lake sequence.The oils are immature and belong to two primary genetic families with some oils severely biodegraded. The less altered oils are rich in the C13 - C25 and C30 acyclic isoprenoid alkanes. Source beds within the evaporitic sequence contain 0.5 - 1.0% total organic carbon and yield up to 1900 ppm solvent-extractable organic matter. Oil-source rock correlations indicate that the oils originated within those facies drilled; this represents the first reported examples of non-marine Cambrian petroleum. The main precursor organisms were benthonic algae and various bacteria.Studies of organic matter in Cambrian strata from five other stratigraphic wells in the basin reveal regional variations in hydrocarbon source potential that relate to differences in precursor microbiota and/or depositional environment and regional maturation. Micritic carbonates of marine sabkha origin, located along the southeast margin of the basin, are rated as marginally mature to mature and good to prolific sources of oil. Further north and adjacent to the Musgrave Block, Cambrian siltstones and shales have low organic carbon values and hydrocarbon yields, and at best are only marginally mature. Varieties of organic matter recognised during petrographic studies of carbonates in the Officer Basin include lamellar alginite (alginite B) and "balls" of bitumen with reflectance in the range 0.2 to 1.4%.

SEQUENCE STRATIGRAPHY OF THE EASTERN OFFICER AND ARROWIE BASINS: A FRAMEWORK FOR CAMBRIAN OIL SEARCH

1991 ◽  
Vol 31 (1) ◽  
pp. 177 ◽  
Author(s):  
D. I. Gravestock ◽  
J.E. Hibburt
Keyword(s):  
Carbonate Reservoir ◽  
Source Rocks ◽  
Tectonic Activity ◽  
Reservoir Quality ◽  
Organic Carbon Content ◽  
The North ◽  
Subaerial Exposure ◽  
Potential Source ◽  
Shelf Slope ◽  
Playa Lake

The Early Cambrian eastern Officer and Arrowie Basins share a common sequence stratigraphic framework despite their contrasting settings. The Arrowie Basin was initially a shallow marine shelf between two land masses with moderate to abrupt shelf-ramp and shelf-slope profiles deepening to the north and south. Tectonic activity subsequently restricted open marine access to the north resulting in evaporite and red bed deposition. In the eastern Officer Basin epeiric sea sediments had open marine access only to the northeast. The palaeoslope was low and surrounding land supplied abundant siliciclastics. Following marine withdrawal alkaline playa lake and evaporitic mudflat deposits spread across the hinterland. Potential source rocks in the Arrowie Basin are thick transgressive and early high-stand deposits of the lowest three sequences. Organic carbon content may be highest (on slender evidence) where marine circulation was restricted. Carbonate reservoir quality on the shelf depends on subaerial exposure during marine lowstands. Prograding highstand sands, carbonate grainstones, and syntectonic channel deposits have untested reservoir potential. In the eastern Officer Basin potential source rocks are thin but widespread. Oil has been generated in the playa lake sediments. Fluvial, aeolian and shoreline sandstones, and those interbedded with carbonates, have excellent reservoir characteristics. The interbedded sands are thin but may be grouped near sequence boundaries. Lowstand carbonate breccias have generally unpredictable reservoir quality. Major differences in source and reservoir bed distribution between these basins, which share the same cycles of relative sea level change, are: palaeoslope, proximity to open marine conditions, duration of subaerial exposure and availability of terrigenous clastics.

An Approach to Estimating Playa Lake Flooding

2003 ◽  
Author(s):  
Richard H. French ◽  
Julianne J. Miller ◽  
Charles R. Dettling
Keyword(s):  
Playa Lake

scholarly journals The role of microbial mats in the movement of stones on playa lake surfaces

2013 ◽  
Vol 298 ◽  
pp. 53-64 ◽  
Author(s):  
M.E. Sanz-Montero ◽  
J.P. Rodríguez-Aranda
Keyword(s):  
Microbial Mats ◽  
Playa Lake

Hydrogeological behaviour of the Fuente-de-Piedra playa lake and tectonic origin of its basin (Malaga, southern Spain)

2016 ◽  
Vol 543 ◽  
pp. 462-476 ◽  
Author(s):  
Miguel Rodriguez-Rodriguez ◽  
Sergio Martos-Rosillo ◽  
Antonio Pedrera
Keyword(s):  
Southern Spain ◽  
Playa Lake ◽  
Tectonic Origin ◽  
Hydrogeological Behaviour
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