Developmental Characteristics And Its Formation Environment Of The Calci Beans In Jinbaoshi Formation,Middle Devonian,Beichuan

In this study,the internal structure of the flanking beans and the core and the carbon and oxygen of the cladding layer were studied by means of analysis methods such as rock flakes,total organic carbon,carbon and oxygen isotopes,strontium isotopes,X-ray diffraction,trace and rare earth elements.Isotopic characteristics,strontium isotopic characteristics,rare earth element distribution pattern,core and infiltration of soybean size and other characteristics of the in-depth study,and with the percolated soil,rock fossils in the rock and Feixianguan group oolitic limestone and other samples The results showed that the top of the Beichuan Devonian gold gemstone group was not a giant oolitic,nor a nuclear-shaped stone,but a result of the freshwater leaching of the atmosphere.The content of TOC in the cladding can reach 0.1%,and the isotopic value of the organic carbon in the cladding is extremely negative.The formation of filter beans and microbial activities are closely linked,belonging to the category of microbial rocks.The formation of leaching beans requires biodegradable organic mudstone,exposed and exposed to atmospheric water leaching,microbial organisms around the biological growth of biological conditions such as debris,in the vertical development of percolation beans with significant zoning Sex,close to the exposed surface,the thicker the percolated bean shell,and away from the exposed surface,the infiltration of soybean shell gradually thinning or even completely disappeared.