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Characteristics and genesis of deeply buried under-compacted sandstone and its comparison with normal Sandstone-A case in the lenghu tectonic belt, northern Qaidam Basin by Jiajia Guo; Jiangong Wang; Yajun Shi; Haipeng Li; Jian Zhao; Zhaobin Wang; Ruiliang Guo is a Engineering article available to read on EtoBox.
What is Characteristics and genesis of deeply buried under-compacted sandstone and its comparison with normal Sandstone-A case in the lenghu tectonic belt, northern Qaidam Basin about?
Based on recovered core observations and thin section identifications combined with scanning electron microscopy images and statistics for physical properties, XRD analysis, and data for trace elements and carbon and oxygen isotopes, the genesis of under-compacted sandstone in the Lower Ganchaigou Formation of the Paleogene in the Lenghu VII structure in the northern Qaidam Basin has been confirmed through a detailed comparison with normal intervals for petrology, sedimentary environments and diagenetic characteristics. The results showed that under-compacted sandstone, developing in underwater distributary channels, was characterized by abnormal high porosity and large amount of intergranular pores. The genesis of intergranular pores is the intrusion of organic acid fluids, dissolution of calcite cements and restoration of primary pores. Conclusions could be drawn from the comprehensive comparison with normal interval. First, honeycomb-like chlorite grain coatings were much abundant (33%–58% in total clays) in the under-compacted sandstone comparing to it in normal interval and sandstone in adjacent area (<30%), indicating an intrusion of Mg-rich fluid leading to transformation fr
Who reads Characteristics and genesis of deeply buried under-compacted sandstone and its comparison with normal Sandstone-A case in the lenghu tectonic belt, northern Qaidam Basin?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Jiajia Guo; Jiangong Wang; Yajun Shi; Haipeng Li; Jian Zhao; Zhaobin Wang; Ruiliang Guo
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)