Isotopic analysis can be performed on minerals, rocks, soil, tissue, gases, and liquids – just about anything. In view of the broad possibilities, we will only cover a few generalities here. In most instances, the element to be analyzed must be first isolated and purified before it can undergo isotopic analysis in a mass spectrometer. Purification is necessary to avoid isobaric interferences an...

Detrital zircon studies are providing new insights on the evolution of sedimentary basins but the role of sedimentary recycling remains largely undefined. In a broad region of northwestern North America, this contribution traces the pathway of detrital zircon sand grains from Proterozoic sandstones through Phanerozoic strata and argues for multi-stage sedimentary recycling over more than a bill...

The formation of the East Kunlun Orogen (EKO) was related to tectonic evolution Proto-Tethys and Paleo-Tethys Oceans. However, how Ocean transited from Ocean, whether subducted northward beneath Kunlun–Qaidam Terrane in Carboniferous Permian times, is still highly debated. Early Halaguole Late Haoteluowa formations are extensively outcropped EKO, north Tibetan Plateau, have thus recorded key in...

The precise exploration of the characteristics geothermal fields in sedimentary basins, such as temperature and burial depth their deep reservoirs, is great significance for improving probability penetration reducing risks development costs. This study proposed a joint method combining magnetotelluric (MT) sounding geothermometers. Using this method, estimated reservoirs’ circulation water Xian...

Quantum mechanical electronic structure calculations are playing an increasingly useful role in many areas of mineralogy and geochemistry. This review introduces the density functional method for such calculations, gives an overview of the density functionals developed at the University of Minnesota, and summarizes selected applications using these density functionals that are relevant to miner...

sediments are generally regarded as the sink for dissolved elements carried out to the sea by rivers. in order to study the source and mechanism of metal transport in sea water, 123 surface sediment samples were taken by using grab sampler in the northwest part of the persian gulf in summer. grain size analysis and geochemical analysis by icp-oes were carried out on samples after sample prepara...

Syenites are relatively rare within the Nigerian Basement Complex. As a result of their rarity, these rocks have been given less research attention over time and consequently poorly understood. The syenitic at Igarra were studied to ascertain tectonic evolution using geochemistry. Sampling was carried out survey-type geological field mapping approach. A total 10 samples collected for laboratory...

The initiation of a continental rift or the birth an oceanic basin, and their long-term evolution, are challenges in understanding evolution regional global tectonics. Rifts develop within interior margins plates, essentially as extensional structures, they have been studied widely since discovery plate eastern segment Paleo-Tethys traversed central Asia, its structural features, timing, geolog...

Abstract Earth’s climatic evolution over the last 5 million years is primarily understood from perspective of marine mechanisms, however, role terrestrial feedbacks remains largely unexplored. Here we reconstruct soil moisture variability in Central Asia using paleomagnetism data and isotope geochemistry an 80 m-thick sedimentary succession at Charyn Canyon, Kazakhstan. We identify a long-term ...