Emergence of Continents Stabilized the Bioavailability of Boron
Terra Nova, EarlyView.ABSTRACT Boron is an essential element for the development of life on Earth; borates stabilize ribose in prebiotic reactions and facilitate metabolism in higher plants. There is, however, a relatively narrow surface boron concentration range over which borates stabilize and serve as a micronutrient rather than a toxin.
Brendan V. Dyck, Jon Wade
wiley +1 more source
The Kolar Schist Belt: A possible Archaean suture zone [PDF]
The Kolar Schist Belt represents a N-S trending discontinuity in the structures, lithologies, and emplacement and metamorphic ages of late Archean gneisses.
Balakrishnan, S. +3 more
core +1 more source
U-Pb isotopic results for single shocked and polycrystalline zircons record 550-65.5-Ma ages for a K-T target site and 2700-1850-Ma ages for the Sudbury impact event [PDF]
The refractory mineral zircon develops distinct morphological features during shock metamorphism and retains these features under conditions that would anneal them in other minerals.
Bohor, B. F., Kamo, S. L., Krogh, T. E.
core +1 more source
Detrital zircon from a late Paleozoic accretionary complex of SW Iberia (Variscan Belt): History of crustal growth and recycling at the Rheic convergent margin [PDF]
, 2012 In this study we present new U-Pb ages of detrital zircons from greywackes and quartzites of the Pulo do Lobo Anticline (PLA) that have been interpreted to represent a Late Paleozoic accretionary complex in SW Iberia.
Chichorro, M. +4 more
core
RUDN Journal of Engineering Research, 2015 The first results of U/Pb (LA-ICP-MS) dating of detrital zircons from quartz sandstones of the Devonian Takaty Formation are presented. The obtained ages span a range from 1857.5 ± 53.8 to 3054.0 ± ± 48.0 Ma.
E S Pyzhova, N S Popova
doaj
Heavy mineral stratigraphy of the Unayzah Formation and Basal Khuff Clastics (Carboniferous to Permian) of Central Saudi Arabia [PDF]
, 2010 A study of heavy mineral assemblages in the Unayzah Reservoir sandstones of central Saudi Arabia has identified successive changes in provenance signature.
Cocker, Joshua D. +2 more
core
RUDN Journal of Engineering Research, 2014 The detrital zircons were delivered from sandstones of Brusov Fm. of Mezen basin. Absence of detrital zircons with 750-510 Ma and availability of two distinct populations - Paleoproterozoic and Archean - with ages resembled well known ages of crystalline
M L Ezekia, N B Kuznetsov, T V Romanyuk
doaj
Early Archean tonalite gneiss in the upper peninsula of Michigan [PDF]
Geochronological results on tonalite gneiss of northern Michigan that is 3.56 Ga or slightly older is presented. Tonalitic augen gneiss and structurally overlying biotite gneiss and schist are exposed in a dome near Watersmeet.
Peterman, Z. E. +2 more
core +1 more source
1º Congresso Internacional de Geologia de Timor-Leste. [PDF]
, 2012 Congresso Internacional de Geologia de Timor ...
Costa, Norberta, Nogueira, Pedro
core
U-Pb zircon geochronology and evolution of some Adirondack meta-igneous rocks [PDF]
An update was presented of the recent U-Pb isotope geochronology and models for evolution of some of the meta-igneous rocks of the Adirondacks, New York.
Mclelland, J. M.
core +1 more source