Abstract Since the Carboniferous, over 7.0 billion tons (Gt) of karstic bauxite deposits have
formed in the North China Craton (NCC) and the South China Block (SCB), rendering them …

The role of biogenicity in the mineral world is larger than many might assume. Biological
processes and physical and chemical processes interact both at the Earth's surface and far …

Iron and iron–manganese deposits form three closely spaced clusters within the Lesser
Khingan Range of the Russian Far East. Fe-Mn mineralization is hosted in Vendian …

The aftermath of the Marinoan glaciation is an important period in the evolutionary history of
Earth. Here we report on the dynamically biogeochemical cycling and organic mineralization …

Abstract During the Middle Permian, Earth experienced a period of profound environmental
changes, including the final stages of the Late Paleozoic Ice Age (LPIA), global seawater …

The direct precipitation model of Mn‑carbonate formation, based on investigation of the
modern sedimentary record and simulation experiments, is commonly used to explain the …

There is an increasing consensus that microbes play a critical role in the genesis of
sedimentary manganese (Mn) carbonate deposits. However, compelling evidence for the …

Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining
district (Pantanal, Brazil). Microbially mediated formation as microbialites has been …

In Central Europe, and particularly in Hungary, economically important (Csajághy et al.
1953) potassium-rich (pseudo) trachyte and K-metasomatized volcanic rocks are recognized …

Abstract The Middle Permian manganese deposit in Zunyi, northern Guizhou is one of the
major manganese mining areas in South China. However, the age of this manganese …