Abstract
Finding of vivianite is first described in a sediment core raised from the Cambridge Strait, western Franz Josef Land. The vivianite is represented by similar spherules mainly of 200–400 micrometers in diameter and by their rare aggregates. Distribution of the vivianite grains in the core is characterized by three maximal values (up to 2.7 grains per gram of dry bulk sediment), within the time interval of the last 4.1 kyr. Linear and flat shape of the aggregates indicates generation of vivianite at the sediment/water interface. It takes place in the reducing condition and sulfide sulfur deficit in the bottom water relative to bivalent iron. Structure of the vivianite grains varies from the cryptocrystalline porous to the fully crystalline dense one reflecting stages of the vivianite crystallization, likely after coagulation of the ferrous phosphate colloid formed due to the bacterial activity. Signs of vivianite microconcrections mentioned by some authors are not observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
