Tectonic and sediment supply control of deep rift lake turbidite systems: Lake Baikal, Russia

Abstract

Research Article| February 01, 1999 Tectonic and sediment supply control of deep rift lake turbidite systems: Lake Baikal, Russia C. Hans Nelson; C. Hans Nelson 1U.S. Geological Survey, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Evgeny B. Karabanov; Evgeny B. Karabanov 2Department of Geological Science, University of South Carolina, Columbia, South Carolina 29208, USA Search for other works by this author on: GSW Google Scholar Steven M. Colman; Steven M. Colman 3U.S. Geological Survey, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Carlota Escutia Carlota Escutia 4Ocean Drilling Program, Texas A & M University, College Station, Texas 77845, USA Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (2): 163–166. https://doi.org/10.1130/0091-7613(1999)027<0163:TASSCO>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation C. Hans Nelson, Evgeny B. Karabanov, Steven M. Colman, Carlota Escutia; Tectonic and sediment supply control of deep rift lake turbidite systems: Lake Baikal, Russia. Geology 1999;; 27 (2): 163–166. doi: https://doi.org/10.1130/0091-7613(1999)027<0163:TASSCO>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract Tectonically influenced half-graben morphology controls the amount and type of sediment supply and consequent type of late Quaternary turbidite systems developed in the active rift basins of Lake Baikal, Russia. Steep border fault slopes (footwall) on the northwest sides of half-graben basins provide a limited supply of coarser grained clastic material to multiple small fan deltas. These multiple sediment sources in turn laterally feed small (<10 km diameter) unchannelized sublacustrine sand-rich aprons that are deposited at the slope base on the lake floor. Gradual slopes of the southeastern ramp margins (hanging wall) of the lake basins, conversely, feed finer grained sediment from larger drainages into two different types of channelized turbidite sublacustrine fan systems: (1) small (5–20 km) laterally fed sand-rich fans sourced by local rivers, often originating from glaciated valleys; and (2) large (>65 km) axially fed elongate mud-rich fans sourced by regional exterior drainage of the Selenga River that supplies large quantities of silt. Basin plain turbidites in the center of the linear basins and axial channels that are controlled by rift-parallel faults are fed from, and interfinger with, aprons and fans. The predictability of the turbidite systems in Lake Baikal provides the best example yet studied of how tectonics and sediment supply interact to control the development of a wide variety of coeval turbidite systems on a single basin floor. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.