Yes, the fluid inclusions of halite can express some important information of paleoseawater in some degree. They can only indicate the components of paleoseawater in that time, but can`t reflect why the components of paleoseawater was so, can`t reflect what process the paleoseawater experienced.
I think the fluid inclusions of halite in some evaporite deposits just can indicate the changes of paleoseawater in that basin in that time, besides, the paleoseawater in that basin in that time may have exchanged with many sources. They can`t indicate the whole and homogeneous components of paleoseawater in that time.
There still need to find new evidences in primary marine stratum in closed basin unmodification.
Dear Kenneth M Towe ,
Thanks very much for your suggestion. The paper gives me a new insight for my research. Thank you!
Qin
According to me paleowater indications may be inferred from fluid inclusion in primary halite.
Dear Anirbid Sircar,
I think fluid inclusion in primary halite can indicate the composition of paleo-seawater to a greater degree, but can`t be a proxy of original composition of paleo-seawater.
You may as well see this study through the link below. It may offer some information.
http://www.ged.rwth-aachen.de/Ww/projects/salt/GeoLeipzig_Schleder+04_final/Halite_microstructures_geolepzig.htm
I think the fluid may INDICATE the contents of paleo seawater but I would not go so far as to say the results would be CONCLUSIVE. The key here is whether or not there has been any movement of the salt since original deposition. My salt studies have been exclusively in the Gulf of Mexico where salt movement has facilitated the inclusions of sediments and other minerals.
Dear Professor Blessing Adeoti and Sharon Cornelius,
Thanks very much for your great suggestion. It is right to consider the property of halite (primary or secondary). The salt movement will change the occurrence of primary fluid inclusion in halite. But, before the salt movement, the primary fluid inclusion in halite may contain the chemical components, from marine, terrestrial, or geothermal water. Because it needs enough time and conditions for precipitation of halite from liquid. When the seawater flow into a basin, some weathering materials around basin will also flow into the basin before the forming of halite. This will change the compositions of liquid in basin. Although it is primary fluid inclusion in halite, it may not be used to indicate the original seawater. Is it right ? The salt movement is equal to a post-reformation or recrystallization, these processes will change the original face of fluid in halite uttermost, I think. Is it right ? Thanks very much.
Best Regards,
Qin
Dear Zhanjie Qin..... Your discussion is geologically true. I am sure you now have a grip on how to handle your research objective on this matter.
Zhanjie Qin, Your summary is accurate. I think you now realize the many issues surrounding your salt research that may be difficult to answer. One must be careful about paleo assumptions.
Fluid inclusions in all minerals should be used with care. For many minerals the system is open to exchange during formation. I used cathodoluminescdence to see growth banding in sphalerite and I could see healed incluions that looked primary were aligned along otherwise invisible healed fractures.
I stress, also, the issues with glacial ice which is used to determine ancient temperatures by isotope. The snow on a glacier can go through many freezeing/melting cycles before it is encapsulated. THe fluid inclusion can lose light isotopes and not reflect what the investigator supposes. Furthermore, the calibration to ambient temperature at the surface will yield a hockey stick with depth.
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