Portal de Periódicos da CAPES

Salina-margin tepees, pisoliths, and aragonite cements, Lake MacLeod, Western Australia: Their significance in interpreting ancient analogs

1984; Geological Society of America; Volume: 12; Issue: 9 Linguagem: Inglês

10.1130/0091-7613(1984)12 2.0.co;2

1943-2682

C. Robertson Handford, Alan C. Kendall, Dennis R. Prezbindowski, John B. Dunham, Brian W. Logan,

Hydrocarbon exploration and reservoir analysis

Research Article| September 01, 1984 Salina-margin tepees, pisoliths, and aragonite cements, Lake MacLeod, Western Australia: Their significance in interpreting ancient analogs C. Robertson Handford; C. Robertson Handford 1Amoco Production Company, P.O. Box 591, Tulsa, Oklahoma 74102 Search for other works by this author on: GSW Google Scholar Alan C. Kendall; Alan C. Kendall 2Sohio Petroleum Company, 50 Fremont Street, San Francisco, California 94105 Search for other works by this author on: GSW Google Scholar Dennis R. Prezbindowski; Dennis R. Prezbindowski 3Amoco Production Company, P.O. Box 591, Tulsa, Oklahoma 74102 Search for other works by this author on: GSW Google Scholar John B. Dunham; John B. Dunham 4Union Oil Research Center, P.O. Box 76, Brea, California 72621 Search for other works by this author on: GSW Google Scholar Brian W. Logan Brian W. Logan 5Department of Geology, University of Western Australia, Nedlands, Western Australia 6009 Search for other works by this author on: GSW Google Scholar Author and Article Information C. Robertson Handford 1Amoco Production Company, P.O. Box 591, Tulsa, Oklahoma 74102 Alan C. Kendall 2Sohio Petroleum Company, 50 Fremont Street, San Francisco, California 94105 Dennis R. Prezbindowski 3Amoco Production Company, P.O. Box 591, Tulsa, Oklahoma 74102 John B. Dunham 4Union Oil Research Center, P.O. Box 76, Brea, California 72621 Brian W. Logan 5Department of Geology, University of Western Australia, Nedlands, Western Australia 6009 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (9): 523–527. https://doi.org/10.1130/0091-7613(1984)12 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation C. Robertson Handford, Alan C. Kendall, Dennis R. Prezbindowski, John B. Dunham, Brian W. Logan; Salina-margin tepees, pisoliths, and aragonite cements, Lake MacLeod, Western Australia: Their significance in interpreting ancient analogs. Geology 1984;; 12 (9): 523–527. doi: https://doi.org/10.1130/0091-7613(1984)12 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Tepee structures, banded aragonite cements, and pisoliths are currently forming in Lake MacLeod, a carbonate-evaporite salina in Western Australia. Although Lake MacLeod is separated from the Indian Ocean by a barrier, it lies 3–4 m below sea level, which promotes the seepage of seawater through the barrier and its discharge from vents and seepage mounds around the margin of the salina. Discharging waters have precipitated and diagenetically altered carbonate sediments within these seepage mounds to form tepee structures of lithified protodolomite overlying cavities that are lined with banded aragonite cement and floored by both cement and pisoliths.Significant variations in δ18O (5.1‰ PDB) and δ13C (5.5‰ PDB) of the aragonite cements were documented and are thought to record shifts in the isotopic composition of the water brought about by the effects of evaporation, influx of meteoric water, and oxidation of organic water. Carbon-14 dating of cements indicates that cementation began about 3400 B.P. and has proceeded at a rate of about 0.2 to 0.4 mm/100 yr, the highest rate occurring during evaporative episodes.By analogy with Lake MacLeod and other Australian salinas, peritidal tepee structures and associated diagenetic carbonates in the Permian Capitan Reef complex may owe their origin to speleanlike diagenesis operative in a marine groundwater discharge zone. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.