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首页> 外文期刊>Journal of Asian earth sciences >Hydrocarbon generation potential and Miocene-Pliocene paleoenvironments of the Kangal Basin (Central Anatolia, Turkey)
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Hydrocarbon generation potential and Miocene-Pliocene paleoenvironments of the Kangal Basin (Central Anatolia, Turkey)

机译：康加尔盆地（土耳其中部安那托利亚）的生烃潜力和中新世-上新世古环境

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This study deals with the organic geochemical characteristics, hydrocarbon generative potential and Miocene-Pliocene paleoenvironments of the Kangal coal district, which developed in a limnic depositional environment and contains the Hamal, Etyemez and Kalburcayin coal fields in the southern part of the Sivas Basin (Central Anatolia). Around Kalburcayin, the average thickness of each of the two coal seams approximately 10 m are currently being exploited based on open-cast methods, the coal from which is used by the nearby lignite-fired Kangal power station. An attempt was made to elucidate depositional conditions through proximate and ultimate analyses, coal petrography and the geochemical characteristics of the Kangal coals. These coals have a huminite reflectance value of R_(max) = 0.40%. Accordingly, from the standpoint of coal rank, this is a dull brown coal of the "subbituminous C" type. Huminite is the most widespread maceral type, while gelinites are the most often encountered macerals. Relative to liptinites, the proportion of inertinites is high. On the basis of maceral composition, the depositional environment of the Kangal coals was determined to be either a forest swamp or a lake bottom. The distributions of the C_(27) and C_(28)-C_(29) steranes for all these coal samples are very similar (C_(29) > C_(27) > C_(28)). Tricyclic terpanes have low concentrations in all samples of the Kangal coals, and are dominated by low molecular weight compounds (C_(20)-C_(24)) with a maximum at C_(23). Total organic carbon (TOC, wt.%) values of the Kalburcayin samples are 4.64-30.64 wt.%, in the Hamal samples 0.83-2.53 wt.%, and in the Etyemez samples 8.91- 10.39 wt.%. On the basis of T_(max) values, the samples are in the immature-early mature stage. According to Rock-Eval pyrolysis data, the coals have hydrocarbon source-rock potential, but the coaly shales and other organic-matter-rich levels have no hydrocarbon source-rock potential. The high inertinite levels and high vitrinite/inertinite ratios suggest that the Kangal coals have more potential for gas generation than oil.
机译：这项研究针对的是Kangal煤区的有机地球化学特征，烃生成潜力和中新世-上新世的古环境，该环境是在liminic沉积环境中发育的，包含了Sivas盆地南部（中部）的Hamal，Etyemez和Kalburcayin煤田。安纳托利亚）。 Kalburcayin周围，目前正在基于露天开采法开采两个煤层中每个煤层的平均厚度约10 m，附近的褐煤发电厂Kangal使用该煤。试图通过近距离和最终分析，煤岩学和Kangal煤的地球化学特征来阐明沉积条件。这些煤的腐殖质反射率值为R_（max）= 0.40％。因此，从煤等级的观点来看，这是“亚烟煤C”型的暗褐色煤。腐殖质是最普遍的黄石类型，而胶结石是最常遇到的黄石。相对于脂蛋白，惰质的比例很高。根据宏观组成，确定Kangal煤的沉积环境为森林沼泽或湖底。所有这些煤样品的C_（27）和C_（28）-C_（29）甾烷的分布非常相似（C_（29）> C_（27）> C_（28））。三环萜烯在所有Kangal煤样品中的浓度都较低，并且以低分子量化合物（C_（20）-C_（24））为主，最高为C_（23）。 Kalburcayin样品的总有机碳（TOC，wt。％）值为4.64-30.64 wt。％，在Hamal样品中为0.83-2.53 wt。％，在Etyemez样品中为8.91-10.39 wt。％。基于T_（max）值，样品处于未成熟的早期阶段。根据Rock-Eval热解数据，煤具有烃源岩潜力，而煤质页岩和其他富含有机物的水平则没有烃源岩潜力。高惰质岩含量和高钙钛矿/惰质岩比率表明，与石油相比，Kangal煤具有更大的产气潜力。

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