Results 31 to 40 of about 19,693 (231)
U-Pb ages and Nd isotope characteristics of the lateorogenic, migmatizing microcline granites in southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 2005 U-Pb ages and whole-rock Nd isotope data have been obtained from the Paleoproterozoic lateorogenic migmatizing microcline granites of southwestern Finland.
M. Kurhila +4 more
doaj +1 more source
Geochemistry of Kauai shield-stage lavas: Implications for the chemical evolution of the Hawaiian plume [PDF]
, 2003 We measured He, Sr, Nd, Pb, and Os isotope ratios and major and trace element concentrations in stratigraphically and paleomagnetically controlled shield-stage lavas from Kauai, Hawaii. The range of 3He/4He ratios (17–28 RA) from Kauai is similar to that
Bogue, S. W. +3 more
core +1 more source
Nature Communications, 2019 The Nd isotope composition of seawater has been used to reconstruct past changes in the various contributions of different water masses to the deep ocean, with the isotope signatures of endmember water masses generally assumed to have been stable during ...
Ning Zhao +5 more
doaj +1 more source
Brazilian Journal of Geology, 2017 : High-resolution chemostratigraphic data of carbonates from the Sete Lagoas Formation (Bambuí Group) show large variations on the C, O, and Sr isotope compositions.
Cristian Guacaneme +3 more
doaj +1 more source
Continental weathering as the source of iron in Jurassic iron oolites from Switzerland
Swiss Journal of Geosciences, 2023 Iron is extremely insoluble in oxic seawater. The lack of a large aqueous reservoir means that sediments rich in authigenic iron are rare in the modern ocean.
Stefan Schunck +4 more
doaj +1 more source
The Capitanian Minimum: A Unique Sr Isotope Beacon of the Latest Paleozoic Seawater
Frontiers in Earth Science, 2021 The long-term trend in the Paleozoic seawater 87Sr/86Sr was punctuated by a unique episode called the “Capitanian minimum” at the end of the Guadalupian (Permian; ca. 260 Ma).
Tomomi Kani, Yukio Isozaki
doaj +1 more source
Frontiers in Earth Science, 2019 Magnesium and lithium stable isotope ratios (δ26Mg and δ7Li) have shown promise as tools to elucidate biogeochemical processes both at catchment scales and in deciphering global climate processes.
Ruth S. Hindshaw +2 more
doaj +1 more source
Cosmogenic and Radiogenic Isotopes [PDF]
Nature, 1964 Radioactive Dating (Proceedings of the Symposium held by the International Atomic Energy Agency in co-operation with the Joint Commission on Applied Radioactivity (ICSU) in Athens, 19–23 November 1962.) (Proceedings Series.) Pp viii + 440. (Vienna : International Atomic Energy Agency; London: H.M.
openaire +1 more source
South Asian monsoon history over the past 60 kyr recorded by radiogenic isotopes and clay mineral assemblages in the Andaman Sea [PDF]
, 2015 The Late Quaternary variability of the South Asian (or Indian) monsoon has been linked with glacial‐interglacial and millennial scale climatic changes but past rainfall intensity in the river catchments draining into the Andaman Sea remains poorly ...
Ali, Sajid +8 more
core +1 more source
Journal of Quaternary Science, EarlyView.ABSTRACT Mount Erciyes, the largest active volcano of Central Anatolia (Turkey), erupted explosively during the Holocene, producing the Karagüllü, Perikartin and Dikkartin tuff rings. Even though major cities like Kayseri and its ~1 million residents sit directly on these pyroclastic deposits, the timing and magnitude of the explosive eruptions have ...
Ivan Sunyé‐Puchol +12 more
wiley +1 more source