Инд. авторы:	Krivonogov S.K., Yi S., Kashiwaya K., Kim J.C., Narantsetseg T., Oyunchimeg T., Safonova I.Y., Kazansky A.Y., Sitnikova T., Kim J.Y., Hasebe N.
Заглавие:	Solved and unsolved problems of sedimentation, glaciation and paleolakes of the Darhad Basin, Northern Mongolia
Библ. ссылка:	Krivonogov S.K., Yi S., Kashiwaya K., Kim J.C., Narantsetseg T., Oyunchimeg T., Safonova I.Y., Kazansky A.Y., Sitnikova T., Kim J.Y., Hasebe N. Solved and unsolved problems of sedimentation, glaciation and paleolakes of the Darhad Basin, Northern Mongolia // Quaternary Science Reviews. - 2012. - Vol.56. - P.142-163. - ISSN 0277-3791.
Внешние системы:	DOI: 10.1016/j.quascirev.2012.08.013; SCOPUS: 2-s2.0-84867742771;
Реферат:	eng: The paper reviews previously published and presents new data on the Darhad Basin, Mongolia, which is a key locality for reconstruction of Quaternary glaciation and environmental changes in northern Central Asia. The previously published data include those obtained in the 20th century by Soviet geological surveys and academic researches of the Darhad Basin, which are, as a rule, not accessible for an international reader, and those obtained by several international teams during the last decade. The new results include geomorphologic, sedimentological and geochronological data obtained prior to and within the International Darhad Drilling Project (DDP-2010). These data show that the Darhad sedimentary sequence has been formed since the Pliocene and represents a detailed archive of environmental changes due to a high content of lacustrine beds. Lakes formed several times in the Darhad Basin by basaltic, glacial and sedimentary dams, which blocked the water outlet of the basin. Of special interest in this paper are the late Pleistocene damming events, which are well-documented in the sediments and landforms, however, their chronology is still obscure. There have been two stages of deep lake. The first lake was dammed by a glacier during late MIS 5 (Krivonogov et al., 2005) or, alternatively, during early to middle MIS 3 (Gillespie et al., 2008a). The second damming, glacial or sedimentary, formed another deep lake during MIS 4 or MIS 2. The level of the lake was greatly variable up to its complete disappearance. Our new data from the DDP10-3 and DN-1 boreholes and from the Hodon outcrop illustrate the Holocene history of the paleolake, which was dammed by the sediments and was kept at low levels. We propose a first sedimentation model for the Holocene part of the lacustrine sedimentary sequence. The lake was minimal or disappeared at ca 12-9.6 and after 4.5 ka cal. BP, relatively deep at 9.6-7.1 and 6.4-4.5 ka cal. BP and shallow at 7.1-6.4 ka cal. BP. Conclusively, we highlighted solved and unsolved geological problems of the Darhad Basin, the most important of which are our recognized stages of the paleolake development (solved) and the detailed chronology and environments of the lacustrine and glacial events (unsolved). © 2012 Elsevier Ltd.
Ключевые слова:	Environmental changes; Geochronology; Holocene; Late Pleistocene; Sediment stratigraphy; 20th century; Academic research; Central Asia; Drilling projects; Environmental change; High-content; Holocenes; International team; Late Pleistocene; Mongolia; Hovsgol; Darhad Basin; Central Asia; sedimentation; sedimentary sequence; reconstruction; Pleistocene; paleolimnology; outcrop; marine isotope stage; lake level; lacustrine environment; Holocene; geomorphology; geological survey; geochronology; environmental change; chronology; borehole; basalt; Lakes; Stratigraphy; Sediments; Sedimentology; Sedimentation; Glacial geology; Geomorphology; Geochronology; Unsolved problems; Sedimentation model; Sedimentary sequence; Pliocene; New results; Mongolia; Dammed lakes; Low level;
Издано:	2012
Физ. характеристика:	с.142-163