Fourier transform infrared spectroscopy (FTIR) can provide crucial information on the
molecular structure of organic and inorganic components and has been used extensively for …

This article addresses the fundamental difference between coal rank and coal type. While
theoretically settled long ago as being different aspects of coal systems science, the two …

Igneous intrusions can bring hydrothermal fluids, metals, and ligands to the surrounding
host sequences, changing their physical, textural and chemical features to some extent …

The genetic identification of different types of natural gas is notably important for assessment
of its sources and exploration potential. The chemical and isotopic (C and H, in particular) …

Large volumes of greenhouse gases such as CH4 and CO2 form by contact metamorphism
of organic-rich sediments in aureoles around sill intrusions in sedimentary basins …

Nitrogen isotope compositions in sedimentary rocks (d 15 N sed) are routinely used for
reconstructing Cenozoic N-biogeochemical cycling and are also being increasingly applied …

1. 中国石油勘探开发研究院, 北京100083 2. 西安石油大学地球科学与工程学院, 西安710065 3.
中国石油长庆油田分公司勘探开发研究院, 西安710018 摘要[目的] 元素地球化学特征分析与古 …

For the past decades the nuclear magnetic resonance (NMR) technology has gained
acceptance as a petrophysical tool for evaluating reservoir properties. Comprehensive …

As a relatively stable craton block in the earth system, the petroliferous basin is influenced
by the evolution of the earth system from the early development environment of source …

Igneous intrusions into coal affect the safety, productivity, and economic viability of many
coal mines. Also, the alterations in coal caused by igneous intrusions encompass a …