Changes

One of the essential steps to determine how the fluids were trapped is to analyze the relationships between fluid inclusion assemblages, mineral growth, or fracture healing. Three different types of fluid inclusions are commonly observed.  

One of the essential steps to determine how the fluids were trapped is to analyze the relationships between fluid inclusion assemblages, mineral growth, or fracture healing. Three different types of fluid inclusions are commonly observed.  

* Primary fluid inclusions are formed during the growth of the surrounding host crystal so the fluid is trapped on the active growing surface of a crystal.  

* Primary fluid inclusions are formed during the growth of the surrounding host crystal so the fluid is trapped on the active growing surface of a crystal.  

* Secondary fluid inclusions are formed when fluids are trapped after the crystal growth is complete. After the mineral precipitation in a rock is complete, the crystals commonly deform by brittle and ductile processes. These deformations result in the development of fractures in the crystals in which the fluid infiltrates and becomes trapped as secondary fluid inclusions as the fractures heal.<ref name=Goldsteinandreyolds_1994>Goldstein, R.H. and Reynolds, T.J. 1994. Systematics of fluid inclusions in diagenetic minerals. SEPM Short Course.</ref>  

* Secondary fluid inclusions are formed when fluids are trapped after the crystal growth is complete. After the mineral precipitation in a rock is complete, the crystals commonly deform by brittle and ductile processes. These deformations result in the development of fractures in the crystals in which the fluid infiltrates and becomes trapped as secondary fluid inclusions as the fractures heal.<ref name=Goldsteinandreynolds_1994>Goldstein, R.H. and Reynolds, T.J. 1994. Systematics of fluid inclusions in diagenetic minerals. SEPM Short Course.</ref>  

* Pseudo-secondary fluid inclusions form when deformation features form during crystal growth and the fluids become trapped in the fractures followed by additional crystal growth.<ref name=Goldsteinandreynolds_1994 />

* Pseudo-secondary fluid inclusions form when deformation features form during crystal growth and the fluids become trapped in the fractures followed by additional crystal growth.<ref name=Goldsteinandreynolds_1994 />