论文部分内容阅读
运用高分辨率飞行时间型二次离子质谱仪(TOF-SIMS),详细研究了吐哈盆地和准噶尔盆地侏罗世烃源岩中矿物沥青基质的生烃性(为了进行对比,亦测定了部分均质镜质体),建立了TOF-SIMS烃源岩评价方法,认为低分辨率的质谱解析对烃源岩生烃性研究是没有意义的,必须应用高分辨率的二次离子质谱仪;据“质量亏损”的质谱裂分规律,准确划分了矿物沥青基质中无机和有机碎片离子峰的归属,讨论了矿物沥青基质的谱形分布特征,其“前陡后缓”的典型特征可与其它组分相区分;由于“基体效应”,使得依靠单个碎片离子进行定量分析不具有实际意义,众多离子相对丰度的综合反映了控制“基体效应”的物质结构和组成;提出了特征峰参数XAL、YOX和ZAR以反映矿物沥青基质中脂、氧和芳香结构的组成,经岩石热解实验表明,在相近成熟度条件下,它们作为矿物沥青基质的成烃性指标
The hydrocarbon generation of the mineral bitumen matrix in the Jurassic source rocks of the Turpan-Hami and Junggar Basins was studied in detail using high-resolution TOF-SIMS (for comparison purposes, part of Homogeneous vitrinite), a method of TOF-SIMS source rock evaluation was established. It is concluded that low-resolution mass spectrometry has no significance for the hydrocarbon generation of source rocks. Therefore, high resolution secondary ion mass spectrometry The “mass loss” mass spectrometry splitting law accurately divides the attribution of inorganic and organic fragment ion peaks in the mineral asphalt matrix. The spectral distribution of the mineral asphalt matrix is discussed. The typical characteristics of the “ Because of the ”matrix effect“, it makes no sense to rely on single fragment ion for quantitative analysis. The relative abundance of many ions reflects the structure and composition of the substance that controls the ”matrix effect." The characteristic peak parameters XAL , YOX and ZAR to reflect the composition of the lipid, oxygen and aromatic structures in mineral bitumen matrix. The pyrolysis experiments show that under similar maturity conditions, Index