Results 51 to 60 of about 43,824 (242)
SeismicaWe used teleseismic Rayleigh waves recorded by three recent broadband seismic arrays in southern Australia to develop a shear wave velocity model of the South Australian Craton from the lower crust to 250 km depth and compare this with isotope data ...
John Paul O'Donnell +8 more
doaj +1 more source
Slave naming patterns : onomastics and the taxonomy of race in eighteenth-century Jamaica [PDF]
, 2001 Every year, slave owners responsible for managing estates were required by Jamaican law to submit to the local vestry an account of the whites, slaves, and livestock on their properties.
Burnard, Trevor
core +1 more source
Acta Geologica Sinica - English Edition, EarlyView.ABSTRACT The Jinqingding gold deposit in eastern Jiaodong is a significant gold mineralization within the Muping–Rushan metallogenic belt. This study integrates structural analysis and trace element geochemistry of sulphides to elucidate ore‐controlling mechanisms and metallogenic models.
Xiaohu Wang +10 more
wiley +1 more source
U–Pb dating and Sm–Nd isotopic analysis of granitic rocks from the Tiris Complex : new constaints on key events in the evolution of the Reguibat Shield, Mauritania [PDF]
, 2012 The Reguibat Shield of N Mauritania and W Algeria represents the northern exposure of the West African Craton. As with its counterpart in equatorial West Africa, the Leo Shield, it comprises a western Archaean Domain and an eastern Palaeoproterozoic ...
Abdouloye, T.B. +6 more
core +1 more source
Research Direction and Science Evaluation: The Role of Coherence and Alignment
Journal of Economics &Management Strategy, EarlyView.ABSTRACT The decisions of funding agencies greatly influence the direction of scientific research; however, our understanding of how applicants' research directions affect the selection process remains limited. In this study, we investigate how a project's coherence with a scientist's previous work and its alignment with current scientific trends ...
Charles Ayoubi +3 more
wiley +1 more source
Two-step Gravity Inversion Reveals Variable Architecture of African Cratons
Frontiers in Earth Science, 2021 The lithospheric build-up of the African continent is still to a large extent unexplored. In this contribution, we present a new Moho depth model to discuss the architecture of the three main African cratonic units, which are: West African Craton, Congo ...
Peter Haas +3 more
doaj +1 more source
Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology
Journal of Metamorphic Geology, EarlyView.ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer +4 more
wiley +1 more source
Response to Pieter C. Emmer’s ‘Reconsideration’
NWIG, 1995 [First paragraph] Criticisms, however strongly expressed, are valuable where they extend and deepen debates. Pieter Emmer's critique, though, is so ill focused, ill informed, and intemperate, that it is difficult to know how to respond profitably ...
Michael J. Craton
doaj
Upper mantle P velocity structure beneath the Midwestern United States derived from triplicated waveforms [PDF]
, 2012 Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure and mechanics of tectonic plates.
Chu, Risheng +2 more
core
Meteoritics &Planetary Science, EarlyView.Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson +3 more
wiley +1 more source