Geotectonically , the youjiang sedimentary basin was referred as youjiang yindosinian folded belt . triassic turbidites accumulated in the basin were derived from surrounding ancient lands including yuebei , jiangnan , and yunkai . tectonic setting of the sedimentary basin was in between an active continental margin and a continental island arc 赋矿浊积岩系的主要物源区为盆地周围的“越北古陆” 、 “江南古陆”和东边地区包括钦防海西褶皱带在内的“云开古陆” ，沉积构造背景介于大陆岛弧和活动大陆边缘之间的过渡构造环境。
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