Boreskov

GENERATION OF MODERN MINERAL‐BIOLOGICAL SYSTEMS UNDERCONTINENTAL CONDITIONSIvanova V.L. 1 , Barinov N.N. 1 , Skirina I.F. 21 FEGI, FEB of RAS, Vladivostok, e‐mail: fegi@vlad.ru2 PIG, FEB of RAS, Vladivostok, e‐mail: sskirin@yandex.ruPP‐14In contrast to the biostagnated systems developed in water basins, the mineralbiologicalsystems localized on the land are more irregular, show a greater degree offortuity, not stable exchange of matters inside the system and with the environment. Theseproperties require specific methods of investigations. In particular, the point‐countermicroanalysis will provide more reliable information about chemical processes than a classicanalysis of media.The paper presents the results of research of interaction of epilithic and epigenouslichens with ore and ore‐free rocks of the scheelite‐sulfide deposit dumps. Fragments of theoxidized ore are populated with bushy lichen Stereocaulon sp. and crustose lichen, ore‐freearea being ignored. Study of the samples, using the electron scanning microscope EVO‐50XVP with spraying of samples, revealed Stereocaulon sp. growing on hypergene ferruginouscrusts and films. More precisely, algae are localized exclusively on crusts, and fungus hyphaeoccur on crusts and under them and penetrate between mineral fragments. Microanalysisshowed that in addition to Fe, S these crusts contain carbon and W. Other admixtureelements vary depending on the primary ore composition.On the ore‐free dumps, mainly on the granodiorite fragments, another genus of lichen –Cladonia sp., Cladonia gracilis (L.)Wild) – grows. Here fine fragments of rocks are entangledwith fungus hyphae, and algae appear above this boundary layer. In the podetium bodythere were found the rounded ferruginous inclusions of 1.5‐2 mkm in size. In theirmorphology they look like pyrite framboids [1]. This can be suggested to be is a result of vitalactivity of thiobacteria, reworking the sulfides [2].Minerals, intergrown with lichens, are diverse: quartz, feldspars, pyroxenes, scheelite,and rarely sulfides. Intergrowth is very firm at a macro‐ and microlevel. In the mineralspectra, carbon is present, and their composition stoichiometry is usually destroyed. This155