Permian Lacustrine Deposits of Northwest China

• Autores: Marwan Wartes, Alan R. Carroll, Todd J. Greene, Keming Cheng, Hu Ting
• Localización: Lake basins through space and time / coord. por Elizabeth H. Gierlowski-Kordesch, K. Kelts, 2000, ISBN 0891810528, págs. 123-131
• Idioma: inglés
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• Resumen

  • Permian deposits of the Junggar and Turpan-Hamibasins of the Xinjiang Uygur Autonomous Region of northwest China preserve some of the thickest and mostareally extensive lake strata on Earth. In the south Junggar depocenter, these nonmarine deposits are up to 5 kmthick and organic-rich facies rank among the thickestand richest petroleum source rocks in the world (Grahamet al., 1990; Lawrence, 1990; Demaison and Huizinga, 1991;Carroll et al., 1992).In addition, Permianlacustrine deposits are estimated to span 1000km along strike, indicating that widespread lakes represented amajor paleogeographic feature of central Asia (Figure 1).Unfortunately, the remote location of these deposits has hindered detailed studies, and the western literature contains only sparse reference to this important record of continental sedimentation. The purpose of this paperis to briefly review the Permian nonmarine stratigraphyand report on recent field-based studies documentingthe Permian lacustrine stratigraphy exposed along the north and south flanks of the Bogda Shan (Figure 2).