The impact of natural intra-deposit heating on the δ¹³C signature, organic geochemistry, and petrology of coal and coal-bearing rocks characterised by various degrees of coalification and palaeoenvironments in the Upper Silesian Coal Basin, Poland, is elaborated. Reconstruction of palaeofire performed by heating experiments up to 400 °C in open and semi-closed systems with different heating regimes confirms the crucial significance of temperature and oxygen access. In open-system heating, released ¹³C-depleted gases enrich residue coke in ¹³C compared to raw coal. Petrological examinations did not show the impact of palaeofires on the maceral properties of coal. However, the carried-out experiment caused the formation of devolatilisation pores, rounded edges, cracks, pale rims, as well as higher reflectance and paler colour that was what was expected. Extractable compounds become highly depleted, and low-weight organic compounds nearly absent. Relatively high contents of combustion-formed PAHs are an indicator of open-system heating. In semi-closed systems, the final total isotopic composition was almost unchanged as no components are carried away though changes in petrography and geochemistry occur. Increased extract yields reflect the release of bitumen from closed pores and partial pyrolysis of organic matter. Depletion of lighter n-alkane compounds, total carbon TC and volatiles decrease, and variable values of various alkyl aromatic hydrocarbon ratios are also indicative of semi-closed heating. Coal seams suspected of intra-deposit heating show geochemical and isotopic features similar to semi-closed- rather than open-system heating, and their δ¹³C signatures and organic geochemistry did not respond strongly during laboratory re-heating.

在δ天然帧内存款加热的影响¹³ Ç签名，有机地球化学和煤和含煤岩，其特征在于不同程度的煤化和古环境在上西里西亚煤盆地，波兰的岩石学，阐述。在具有不同加热方式的开放式和半封闭式系统中，通过在高达400°C的温度下进行加热实验来重建古火，证实了温度和氧气的获取至关重要。在开放系统加热中，释放出的¹³种贫C气体丰富了^13种中的残留焦炭C与原煤相比。岩石学检查未显示古火对煤的宏观特性的影响。然而，进行的实验导致形成了脱挥发分的孔，倒圆的边缘，裂缝，浅边缘，以及预期的更高的反射率和更浅的颜色。可萃取化合物变得高度枯竭，几乎没有低重量的有机化合物。燃烧形成的多环芳烃含量相对较高是开放系统加热的指标。在半封闭系统中，尽管岩石学和地球化学发生了变化，但没有任何组分被带走，最终的总同位素组成几乎没有变化。提取物产量的增加反映了沥青从封闭的孔中释放出来以及有机物的部分热解。打火机n的耗竭-烷烃化合物，总碳TC和挥发物减少，各种烷基芳烃比例的可变值也表示半封闭加热。煤层怀疑帧内存款加热的示出了类似于半闭环而不是开放系统的加热地球化学和同位素特征，以及它们的δ ¹³ C ^签名和有机地球化学没有实验室再加热过程中强烈反应。