Abstract— <p>The influence of tectonic and paleoclimatic evolution on the Upper Triassic Chang 7 Member organic-rich shales in the Ordos Basin remains unclear and may be a key factor limiting shale oil exploration in the region. This study employs whole-rock geochemistry, TOC, TN, δ¹⁵N and δ¹³C_org analyses to perform provenance, paleoenvironmental, and paleoclimatic assessments. The results indicate that the Qinling Orogenic Belt is the primary provenance area, with coeval volcanic ash input. The Chang 7-1 is relatively more anoxic, likely due to increased carbon dioxide emissions from volcanic disturbances in the Qinling Orogenic Belt during the global Carnian Pluvial Episode (CPE). Chemical weathering indices reveal a slight transition in the climate from cold and dry to warm and humid during CPE from bottom to top within the Chang 7 Member. This study suggests that warm and humid climate conditions favor increased burial and preservation of organic carbon, while volcanic activity disturbances enhance organic carbon flux by promoting productivity.</p>