Implication of burial history


Early deposition: siderite precipitation and replaced feldspars

The compression and deformation of phyllitic rock fragment is the first major diagenetic change. This could only be done by deep burial. This process also prevent possible early diagenetic change such as calcite pptn; silica overgrowth; and kaolinization. This suggests a quick and deep burial shortly after the deposition.

WHEN WAS THE FELDSPAR DISSOLVED?

Kaolinization, and calcite cementation took place after the uplifting


CHECK TWO REFERENCES:

CONDITIONS OF FELDSPAR DISSOLUTION

CONDITIONS OF PHYLLITE DEFORMATION


Quartz grains are NOT recrystallized. This might be used to set a upper bound to the phyllite deformation.


[Idea for Taiwan research: check the degree of sandstone deformation across the Central Mountains]

How Did The Shanxi Sandstone Become Impermeable?