Southwestern Provenance-Sedimentary System and Provenance Tectonic Setting of Eastern Sag in the North Yellow Sea Basin
Gao Dan
Cheng Rihui
Shen Yanjie
Wang Liaoliang
Hu Xiaoqiang
Abstract：The comprehensive analysis of provenance-sedimentary system and provenance tectonic setting is the basis of oil and gas exploration,the provenance-sedimentary system is the main influence factor of the original reservoir.The North Yellow Sea basin is a Mesozoic-Cenozoic transtensional faulted basin located between Sulu-Linjinjiang orogeny and Jiao-Liao uplift.The del-ta sand deposits developed during the Middle-Late Jurassic have been confirmed by seismic and drilling data in the southwest of eastern sag,the North Yellow Sea basin.Some sedimentary types,including distributary channel,crevasse splay,mouth bar and distal bar,can be recognized in the core rocks and well loggings,and the progradation of sediments in northwestern orien-tation is shown in the seismic reflection.The analysis of petrology and mineralogy of the sandstone samples indicate that they contain granitic and acid volcanic compositions.The element geochemistry characteristics of the mudstone samples show that their major composition is felsic,and the provenance is the craton or the recycling orogeny.The Dickinson diagram of the sands demonstrates their compositions coming from both the craton or the recycling orogeny and volcanic arc orogeny.We suggest that the southwestern provenance in the eastern sag of the North Yellow Sea basin is the recycling orogeny.The granitic com-position comes from the weathered basement granitic rocks,and the volcaniclastics may come from the syn-eruption,or from weathered pre-existing volcanic rocks.
Keywords：the North Yellow Sea basinMiddle-Late Jurassicmaterial compositionprovenance-sedimentary systemtectonic settingsedimentology
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 1171-1187 )