scholarly journals Reply to Comment by Xu et al. on “Sr-Nd isotope composition and clay mineral assemblages in eolian dust from the central Philippine Sea over the last 600 kyr: Implications for the transport mechanism of Asian dust” by Seo et al.

2016 ◽  
Vol 121 (23) ◽  
pp. 14,298-14,303 ◽  
Author(s):  
Inah Seo ◽  
Yong Il Lee ◽  
Chan Min Yoo ◽  
Hyung Jeek Kim ◽  
Kiseong Hyeong
Keyword(s):  
Clay Mineral ◽  
Transport Mechanism ◽  
Isotope Composition ◽  
Asian Dust ◽  
Nd Isotope ◽  
Philippine Sea ◽  
Eolian Dust ◽  
Mineral Assemblages ◽  
Nd Isotope Composition

scholarly journals Age and origin of fluorapatite-rich dyke from Baranec Mt. (Tatra Mts., Western Carpathians): a key to understanding of the post-orogenic processes and element mobility

2016 ◽  
Vol 67 (5) ◽  
pp. 417-432 ◽  
Author(s):  
Aleksandra Gawęda ◽  
Krzysztof Szopa ◽  
David Chew ◽  
Urs Klötzli ◽  
Axel Müller ◽  
...  
Keyword(s):  
Isotope Composition ◽  
Tatra Mountains ◽  
Nd Isotope ◽  
Metasedimentary Rocks ◽  
Partial Melt ◽  
Icp Ms ◽  
Mineral Assemblages ◽  
Tatra Mts ◽  
Crustal Origin ◽  
Nd Isotope Composition

AbstractOn the southeastern slope of the Baranec Mount in the Western Tatra Mountains (Slovakia) an apatite-rich pegmatite-like segregation was found in the subvertical fault zone cutting metapelitic rocks. Two zones: felsic (F) and mafic (M) were found, differing in mineral assemblages and consequently in chemistry. Fluorapatite crystals yield a LA-ICP-MS U-Pb age of 328.6 ± 2.4 Ma. A temperature decrease from 634 °C to 454 °C at a pressure around 500 to 400 MPa with oxygen fugacity increasing during crystallization are the possible conditions for formation of the pegmatite-like segregation, while secondary alterations took place in the temperature range of 340 – 320 °C. The Sr-Nd isotope composition of both apatite and whole rock point toward a crustal origin of the dike in question, suggesting partial melting of (P, F, H2O)-rich metasedimentary rocks during prolonged decompression of the Tatra Massif. The original partial melt (felsic component) was mixed with an external (F, H2O)-rich fluid, carrying Fe and Mg fluxed from more mafic metapelites and crystallizing as biotite and epidote in the mafic component of the dyke.

Nd isotope composition of the Ediacaran and earliest Cambrian phosphorite nodules and Fe sulphide from the East European Platform

2020 ◽  
Vol 157 (12) ◽  
pp. 2081-2088
Author(s):  
Sergey B Felitsyn ◽  
Eugeny S. Bogomolov
Keyword(s):  
East European Platform ◽  
Isotope Composition ◽  
Water Reservoir ◽  
Secular Change ◽  
Early Cambrian ◽  
Iron Sulphide ◽  
Nd Isotope ◽  
East European ◽  
Moscow Syneclise ◽  
Nd Isotope Composition

AbstractAn enhanced concentration of phosphorus has been found at the stratigraphic level of the disappearance of Ediacaran taxa in two areas, the Cis-Dniester region and the Moscow syneclise, on the East European Platform (EEP). The isotope composition of neodymium was determined in Fe sulphide and phosphorite in the same beds. Measured εNd(t) values in diagenetic phosphate nodules are similar to those in iron sulphide from the same layer. During the Ediacaran − Early Cambrian, accumulation of radiogenic Nd in the epeiric basins on the EEP increased progressively from −17.9 and −19.4 in pyrite from the sequence bottom to −7.9 and −8.5 in the Early Cambrian pyrite of the central part of the EEP. The Ediacaran phosphate nodules show εNd(t) ranging from −12.9 to −15.0, while that in the Early Cambrian nodules is typically c. −9.0. These data indicate the secular change in Nd isotope composition of the water reservoir on the EEP from Ediacaran to Cambrian.

Nd isotope composition of seep carbonates: Towards a new approach for constraining subseafloor fluid circulation at hydrocarbon seeps

2019 ◽  
Vol 503 ◽  
pp. 40-51 ◽  
Author(s):  
Michal Jakubowicz ◽  
Jolanta Dopieralska ◽  
Andrzej Kaim ◽  
Petr Skupien ◽  
Steffen Kiel ◽  
...  
Keyword(s):  
Isotope Composition ◽  
Fluid Circulation ◽  
Nd Isotope ◽  
New Approach ◽  
Hydrocarbon Seeps ◽  
Nd Isotope Composition

The 2405 Ma and 2310 Ma Mafic Dyke Swarms in the Karelian Craton: Age, Chemical and Sr-Nd Isotope Composition, and Tectonic Setting

2016 ◽  
Vol 90 (s1) ◽  
pp. 123-123
Author(s):  
A.V. Stepanova ◽  
E.B. Salnikova ◽  
A.V. Samsonov ◽  
Yu.O. Larionova ◽  
S.V. Egorova ◽  
...  
Keyword(s):  
Isotope Composition ◽  
Tectonic Setting ◽  
Mafic Dyke ◽  
Karelian Craton ◽  
Nd Isotope ◽  
Dyke Swarms ◽  
Nd Isotope Composition

Change of Sm-Nd isotope composition during weathering of till

2000 ◽  
Vol 64 (5) ◽  
pp. 813-820 ◽  
Author(s):  
Björn Öhlander ◽  
Johan Ingri ◽  
Magnus Land ◽  
Hans Schöberg
Keyword(s):  
Isotope Composition ◽  
Nd Isotope ◽  
Nd Isotope Composition
Sign in / Sign up

Export Citation Format

Share Document