We have studied the REE distribution in shallow marine continental platform carbonates belonging to two late Neoproterozoic basins of India. Their REE abundance patterns normalized by chondrite display well defined W-type tetrad effect. Based on chondrite-normalized Gd/Ho, La/Nd ratios, the REE abundance patterns have been classified into three groups. (Y/Ho) and (Y/Dy) concentration ratios ref...

khoy, one of the major cities in the west azarbaijan province is known for its nature, military, border positions, proximity to the silk road, including many different cultures and overall is one of the important settlements in the area. this essay investigates khoy city’s expansion, from early islam until late qajar (fourth - fourteenth century) according to historical documents. this article ...

The anticipated high demand for new vanadium resources in support of the green energy revolution will be partly met by carbonaceous deposits. This type deposit is particularly developed during a 200 Myr period from Cryogenian-Cambrian. During this period, anoxic conditions were widely and provided template deposition. Vanadium became available to surface Neoproterozoic when anomalously levels i...

SUMMARY Changes in the geomagnetic field over geologic timescales can be used to study evolution and processes of its sources Earth's deep interior. As a stark contrast behaviour recent past, late Neoproterozoic is defined by ambiguous polar wander paths, ultralow strengths period extreme reversal hyperactivity. Palaeointensity data from this time are still scarce conclusions made these suffer ...

A number of hydrocarbon discoveries have been made recently in the Flemish Pass Basin and Central Ridge, offshore Newfoundland, Canada, but there is only limited geological information available. The primary goal this study was to determine sedimentary provenance paleodrainage patterns mudstones sandstones from Upper Jurassic Rankin Formation, including Lower Kimmeridgian Source Rock (organic-r...

Detailed correlations of ancient glacial deposits, based on temporal records of carbon and strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and repeated stratigraphic relationship between C-isotopic excursions and glaciogenic rocks suggests that unusually high rates of organic carbon burial facilitated glaciation by re...