Although δ¹³C data (either δ¹³C_carb or δ¹³C_org) of many Triassic–Jurassic (T-J) sections have been acquired, paired δ¹³C_carb and δ¹³C_org from continuous T-J carbonate sections, especially in eastern Tethys, have been scarcely reported. This study presents paired and decoupled δ¹³C_carb and δ¹³C_org data from a continuous T-J carbonate section in Wadi Naqab. The T-J Wadi Naqab carbonate section, located in United Arab Emirates, Middle East, represents tropical and shallow marine sedimentation in eastern Tethys. At the T-J boundary interval, an initial carbon isotope excursion (CIE) is observed with different magnitude of isotope excursion and timing in δ¹³C_carb and δ¹³C_org, while subsequently a positive CIE is only distinct in δ¹³C_carb. Based on petrological, carbon isotope, Rock-Eval and elemental analyses, the δ¹³C_carb is thought to record marine inorganic carbon, and the δ¹³C_org to record terrigenous organic carbon. Therefore, the paired δ¹³C_carb and δ¹³C_org herein potentially document simultaneous changes in T-J atmospheric and marine settings of eastern Tethys. Their decoupled behavior may likely be caused by different changes or evolution of carbon pool between marine and atmospheric settings. The initial CIE present in both δ¹³C_carb and δ¹³C_org may indicate influence of isotopically light carbon release related to CAMP activity in both atmospheric and marine settings. The following positive CIE only in δ¹³C_carb suggests relatively steady carbon isotope composition in atmosphere, but enhanced burial of isotopically light carbon in marine settings. Furthermore, the T-J carbonates in the studied section were possibly deposited in normal and oxic shallow marine conditions. Global correlation based on the Wadi Naqab section and other T-J sections suggests spatially different T-J environmental parameters: in eastern Tethys and western Panthalassa, oxic condition, lacking organic-rich sediment, weaker ocean acidification and less influence of isotopically light carbon are more prevalent; in western Tethys and eastern Panthalassa, oxygen-depleted condition, black shales, stronger acidification and heavier influence of isotopically light carbon are more prevalent. These differences may be related to spatial distance from the CAMP or to different paleogeography.

虽然δ ^13个C数据（无论是δ ¹³ C ^_{碳水化合物}或δ ¹³ C ^_有机）多三叠-侏罗纪（TJ）部分已经获得的，成对的δ ¹³ C ^_{碳水化合物}和δ ¹³ Ç_有机从连续TJ碳酸盐部分，特别是在东部克能，几乎没有报道。本研究提出配对和分离δ ¹³ C ^_{碳水化合物}和δ ¹³ C ^_组织瓦迪纳卡布（Wadi Naqab）连续TJ碳酸盐岩剖面的数据。位于中东阿拉伯联合酋长国的TJ Wadi Naqab碳酸盐岩段代表了特提斯东部的热带和浅海沉积。在TJ边界间隔，初始碳同位素偏移（CIE）与在不同大小同位素偏移和定时的观察δ ¹³ Ç_{碳水化合物}和δ ¹³ Ç_组织，而随后的正CIE仅在不同的δ ¹³ Ç_{碳水化合物}。基于岩石，碳同位素，生油岩评价仪和元素分析，该δ ¹³ Ç_{碳水化合物}被认为记录海洋无机碳，和δ ¹³ Ç_有机记录陆源的有机碳。因此，成对的δ ¹³ C ^_{碳水化合物}和δ ¹³ Ç_有机本文潜在记录在TJ大气和同步变化东部泰塞斯海洋设置。它们的脱钩行为很可能是由海洋和大气环境之间碳库的不同变化或演化引起的。同时存在于初始CIE δ ¹³ Ç_{碳水化合物}和δ ¹³ C ^_有机可能表明在大气和海洋环境中与CAMP活性有关的同位素轻碳释放的影响。以下积极CIE仅在δ ¹³ C ^_{碳水化合物}表明大气中碳同位素组成相对稳定，但在海洋环境中埋藏同位素轻碳的埋藏增加。此外，研究区的TJ碳酸盐可能是在正常和有氧的浅海条件下沉积的。基于Wadi Naqab断面和其他TJ断面的全球相关性表明，TJ环境参数在空间上有所不同：在特提斯东部和Panthalassa西部，含氧条件，缺乏富含有机物的沉积物，较弱的海洋酸化和同位素轻碳的影响较小。在特提斯西部和Panthalassa东部，缺氧条件，黑色页岩，更强的酸化作用和同位素轻碳的影响更大。这些差异可能与距CAMP的空间距离或不同的古地理有关。