东部裂谷盆地玄武岩中全铁和亚铁的含量，非生物储层中气体的组成和同位素数据

测试样品来自中国东部裂谷盆地中的典型非生物气藏，如苏北盆地的黄桥气藏、渤海湾盆地的花沟、平南和平方王气藏，以及松辽盆地的松南、庆深气藏等。一共采集41个样品。对所采集玄武岩样品，开展了三价铁和全铁含量分析，并通过计算Fe³⁺/∑Fe来表示相对氧逸度的高低。对天然气样品进行了CO₂、H₂、N₂、He、CH₄和高级烷烃含量分析，并进行了稳定碳氢同位素和稀有气体同位素（例如氦）分析。气体组分（包括CH₄、H₂、CO₂、N₂和 He）采用芬尼根MAT-271仪器，按照国家标准（GB/T 6041-2002和GB/T 10628-89）质谱标准程序进行测定。使用芬尼根MAT-252仪器测量了气体的稳定碳同位素组成。稳定氢同位素组成在由Thermo Finnigan制造的Deltaplus XP质谱仪（GC-TC-IRMS）上进行分析。采用X射线荧光光谱法测试玄武岩中的全铁及其他主量和微量元素。得到的数据不仅有助于理解非生物气的组成和来源，还为非生物气的勘探和开发提供了重要的科学依据和技术支持。

Test samples were obtained from typical abiotic gas reservoirs in the rift basins of eastern China, including the Huangqiao gas reservoir in the Subei Basin, the Huagou, Pingnan and Pingfangwang gas reservoirs in the Bohai Bay Basin, as well as the Songnan and Qingshen gas reservoirs in the Songliao Basin. A total of 41 samples were collected in this study. For the collected basalt samples, analyses of ferric iron (Fe³⁺) and total iron (∑Fe) contents were conducted, and the relative oxygen fugacity was characterized by calculating the Fe³⁺/∑Fe ratio. For natural gas samples, analyses of the contents of CO₂, H₂, N₂, He, CH₄ and higher alkanes were performed, alongside analyses of stable carbon and hydrogen isotopes and rare gas isotopes (e.g., helium). The gas components including CH₄, H₂, CO₂, N₂ and He were determined using a Finnigan MAT-271 instrument following the standard mass spectrometric procedures specified in the national standards GB/T 6041-2002 and GB/T 10628-89. The stable carbon isotope compositions of the gases were measured using a Finnigan MAT-252 instrument. The stable hydrogen isotope compositions were analyzed on a Deltaplus XP mass spectrometer (GC-TC-IRMS) manufactured by Thermo Finnigan. X-ray fluorescence spectrometry was utilized to quantify the total iron and other major and trace elements in the basalt samples. The acquired dataset not only aids in understanding the composition and origin of abiotic gases, but also provides critical scientific basis and technical support for the exploration and development of abiotic gas resources.