Results 31 to 40 of about 48,565 (249)

Mineral chemistry and genesis of Zr, Th, U, Nb, Pb, P, Ce and F enriched peralkaline granites of El-Sibai shear zone, Central Eastern Desert, Egypt

Geologija, 2013
El-Sibai mineralized shear zone trending NNE-SSW is located at the northern segment of Gabal El-Sibai (500m in length and 0.5 to 1.5 m in width).
Mohamed A. Ali
doaj   +1 more source

Late paleozoic to early mesozoic provenance record of paleo-pacific subduction beneath South China [PDF]

, 2015
Northeast trending Yong'an Basin, southeast South China Craton, preserves a Permian-Jurassic, marine to continental, siliciclastic-dominated, retroarc foreland basin succession.
Hu, L., Yang, J., Du, Y., Cawood, P.A., Jiao, L.   +4 more
core   +1 more source

A UNIQUE FINDING OF ZIRCON INTO BADDELEYITE TRANSFORMATION (THE ICHETJU ORE OCCURRENCE, THE MIDDLE TIMAN)

Известия высших учебных заведений: Геология и разведка, 2018
Findings of the growth relationships between baddeleyite and zircon are rare, due to significant differences in the formation conditions of the minerals.
S. G. Skublov, A. O. Krasotkina, A. B. Makeyev, O. L. Galankina, A. E. Melnik   +4 more
doaj   +1 more source

Experimental evidence for the preservation of U-Pb isotope ratios in mantle-recycled crustal zircon grains

Scientific Reports, 2018
Zircon of crustal origin found in mantle-derived rocks is of great interest because of the information it may provide about crust recycling and mantle dynamics.
Fernando Bea, Pilar Montero, Jose Francisco Molina Palma   +2 more
doaj   +1 more source

Identifying the volcanic eruption depicted in a Neolithic Painting at Çatalhöyük, Central Anatolia, Turkey [PDF]

, 2014
A mural excavated at the Neolithic Çatalhöyük site (Central Anatolia, Turkey) has been interpreted as the oldest known map. Dating to ~6600 BCE, it putatively depicts an explosive summit eruption of the Hasan Dağı twin-peaks volcano located ~130 km ...
Ulusoy, İnan, Schmitt, A., Ulusoy, I., Erkan Aydar, Danišík Martin, Martin Danišík, Sen, E., Ulusoy İnan, İnan Ulusoy, Aydar, Erkan, Şen, Erdal, Aydar, E., Schmitt Axel K., Oscar M Lovera, Schmitt, Axel K., Danišík, Martin, Lovera, Oscar M, Aydar Erkan, Axel K Schmitt, Lovera, Oscar M., Lovera Oscar M., Lovera, O., Şen Erdal, Erdal Şen, Schmitt, Axel K   +24 more
core   +2 more sources

Impact of Health System Structures on Caries Prevalence Among Schoolchildren in Germany and Saudi Arabia

Children
Background and Objectives: Dental caries remains one of the most prevalent chronic conditions among children worldwide, with considerable variation in burden shaped by differences in health-system organization and preventive program implementation.
Yasser Mansour Aljafen, Christian Heinz Splieth, Julian Schmoeckel   +2 more
doaj   +1 more source

In-situ zircon U-Pb dating method by LA-ICP-MS and discussions on the effect of different beam spot diameters on the dating results

Dizhi lixue xuebao, 2022
By using the newly introduced GeoLas HD 193 nm ArF excimer laser ablation system and the Agilent 7900 quadrupole inductively coupled plasma mass spectrometer (ICP-MS) in the Key Laboratory of Paleomagnetism and Tectonic Reconstruction at the Institute of
WANG Sen, ZHANG Shuanhong, ZHANG Qiqi, LIANG Xia, KONG Linghao, HU Guohui, WANG Kai, WANG Hongyu, CAI Yuhang   +8 more
doaj   +1 more source

The Medicine Hat Block and the Early Paleoproterozoic Assembly of Western Laurentia

Geosciences, 2020
The accretion of the Wyoming, Hearne, and Superior Provinces to form the Archean core of western Laurentia occurred rapidly in the Paleoproterozoic. Missing from Hoffman’s (1988) original rapid aggregation model was the Medicine Hat block (MHB).
Jennifer N. Gifford, Shawn J. Malone, Paul A. Mueller   +2 more
doaj   +1 more source

Thermoluminescence of zircon: a kinetic model [PDF]

Journal of Physics: Condensed Matter, 2003
The mineral zircon, ZrSiO4, belongs to a class of promising materials for geochronometry by means of thermoluminescence (TL) dating. The development of a reliable and reproducible method for TL dating with zircon requires detailed knowledge of the processes taking place during exposure to ionizing radiation, long-term storage, annealing at moderate ...
Turkin, AA, van Es, HJ, Vainshtein, DI, den Hartog, HW   +3 more
openaire   +1 more source

K-feldspar sand-grain provenance in the Triassic, west of Shetland : distinguishing first-cycle and recycled sediment sources? [PDF]

, 2009
Sandstone provenance studies can help constrain palaeogeographic reconstructions and ancient drainage system scales and pathways. However, these insights can be obscured by difficulties in geochemically distinguishing or adequately characterising ...
Daly, J. Stephen, Shane Tyrrell, Tyrrell, Shane, Leleu, Sophie, J. Stephen Daly, Souders, A. Kate, Haughton, Peter D. W., Peter D.W. Haughton, Sophie Leleu, A. Kate Souders   +9 more
core   +1 more source