Phosphorite breccias compose a 6-m-thick member in the Vendian terrigenous Kernos Formation in the basin of the Mezhevaya Utka and Sylvitsa rivers (Middle Urals). Phosphorite pebbles and gravelites are accumulations of the fragments of redeposited crusts, originally formed during early diagenesis near the surface of sandy–clayey rocks below the water–sediment boundary. Phosphorite is represented by fluorocarbonate apatite with the following parameters: unit cell a ranging from 0.9359 to 0.9363 nm, spectral mode parameters in Raman spectra (ν₁ FWHM = 1–2 cm^–1 and peak position from 963 to 966 cm^–1), and a band at 1095 cm^–1 in FTIR spectra. The bands at ~1430 cm^–1 and 1453 cm^–1 in the FTIR spectra correspond to substitution of the orthophosphorus group by the carbonate ion (B type). According to the thermal analysis data, the CO₂ content in apatite is 0.04–0.8%, and the admixture of dispersed organic matter as aliphatic compounds is 0.3–0.8%. Apatite is represented by two generations: primary (basal structureless fine-crystalline cement) and secondary (euhedral crystals up to 10 µm in size). Both generations corrode the detrital quartz grains. Relative to the primary apatite, the secondary variety is enriched in P₂O₅, CaO, and F, but depleted in SiO₂, Fe₂O₃, Al₂O₃, MgO, and K₂O. The PAAS-normalized REE distribution in the enriched phosphorites has a smoothed profile with a La/Yb ratio of about 2 and positive Ce and Eu anomalies. The average F/P₂O₅ value (0.09) corresponds to that in typical fluorocarbonate apatites subjected to catagenesis. High ⁸⁷Sr/⁸⁶Sr values (0.7130–0.7253) in detrital phosphorites of the Kernos Formation suggest their deposition in a desalinated wave-dominated shallow-marine paleobasin near a significant inflow of continental water (delta) or catagenetic recrystallization.

磷矿角砾岩在 Mezhevaya Utka 和 Sylvitsa 河流域（中乌拉尔）的 Vendian 陆源 Kernos 地层中组成了一个 6 米厚的成员。磷矿卵石和砾石是再沉积地壳碎片的堆积，最初形成于早期成岩作用期间，靠近水-沉积物边界以下的砂质-粘土岩表面。磷灰石以碳氟磷灰石为代表，具有以下参数：晶胞a范围为 0.9359 至 0.9363 nm，拉曼光谱中的光谱模式参数（ν ₁ FWHM = 1–2 cm ^–1和峰位置为 963 至 966 cm ^–1），以及FTIR 光谱中1095 cm ^–1处的一个波段。^{~1430 cm –1}和 1453 cm处的谱带FTIR 光谱中的^{–1对应于正磷基团被碳酸根离子（B 型）取代。}根据热分析数据，磷灰石中CO ₂含量为0.04%～0.8%，夹杂有分散有机质的脂肪族化合物为0.3%～0.8%。磷灰石以两代为代表：初级（基础无结构细晶胶结）和次级（自形晶体尺寸最大为 10 µm）。两代都腐蚀碎屑石英颗粒。相对于原生磷灰石，次生磷灰石富含P ₂ O ₅、CaO和F，但贫化SiO ₂、Fe ₂ O ₃、Al ₂ O ₃、MgO和K ₂O. 富集磷矿中的 PAAS 归一化 REE 分布具有平滑的轮廓，其中 La/Yb 比率约为 2 且正 Ce 和 Eu 异常。平均 F/P ₂ O ₅值 (0.09) 对应于经历了断层作用的典型氟碳酸盐磷灰石中的 F/P 2 O 5 值。Kernos 地层碎屑磷矿中的高 87 Sr/ 86 Sr 值 (0.7130–0.7253) 表明它们沉积在淡化波浪主导的浅海古盆地中，靠近大陆水 (三角洲) 的显着流入或断层^重结晶^。