Results 81 to 90 of about 14,560 (230)
Ocorrência de Ironstones no Devoniano da Bacia do Paraná
Brazilian Journal of GeologyResumo: A origem de ironstones oolíticos, preservados no registro sedimentar, tem sido assunto de muitos debates nas últimas décadas. Tais depósitos formam importantes unidades no registro paleozoico e a determinação de seu significado sedimentológico e ...
Leonardo Costa de Oliveira +1 more
doaj +1 more source
The Depositional RecordIn this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical ...
Salman Ahmed Khattak +7 more
doaj +1 more source
The Effect of Mineral Composition for Diagenesis and Reservoir Physical Property of Ordos Basin-in Case of Chang 7 Reservoir in Jiyuan Area [PDF]
, 2015 Wei Wang +3 more
openalex +1 more source
The Depositional RecordVolcanogenic detritus in sandstones not only conveys important provenance information but also significantly impacts diagenetic processes. This study specifically focuses on such understudied effects by carrying out grain size, petrographic, fluid ...
Yuanlan Tang +11 more
doaj +1 more source
Fluorination of Silver Phosphate in Nickel Reaction Vessels for Triple Oxygen Isotope Analysis
Rapid Communications in Mass Spectrometry, Volume 40, Issue 7, 15 April 2026.ABSTRACT Rationale Increasingly, more laboratories are measuring the triple oxygen isotope values of phosphate. Standardization is key to having good interlaboratory results. Here, we present the triple oxygen isotope values of a suite of standards using fluorination and compare them with previously reported triple oxygen isotope values. Methods Silver
Jordan A. G. Wostbrock +4 more
wiley +1 more source
Rapid Communications in Mass Spectrometry, Volume 40, Issue 7, 15 April 2026.ABSTRACT Rationale Distribution patterns of foraminifera are controlled by environmental parameters such as temperature, salinity, and nutrient concentrations in each water mass. Since trace elements to Ca ratios of marine microfossil calcite test of foraminifera record environmental and ecological habitat information, we used femtosecond (fs) LA‐ICP ...
Toshihiro Yoshimura +7 more
wiley +1 more source
Cyclone‐induced mixing and stratification shape autumnal hypoxia in a temperate estuary
Limnology and Oceanography Letters, Volume 11, Issue 2, March 2026.Abstract Autumnal hypoxia in temperate estuaries is often overlooked due to its smaller extent, weaker intensity, and sparse observations compared to summer. However, climate variability may alter its seasonality. Using 40 yr (1984–2023) of hypoxic volume data from the Chesapeake Bay, combined with numerical simulations, we examined interannual drivers
Chunqi Shen, Jeremy M. Testa
wiley +1 more source
Cooling climate across last interglacial high stands on San Salvador and Great Inagua, The Bahamas
The Depositional Record, Volume 12, Issue 1, February 2026.Temperature data comparison with last interglacial mollusc clumped isotope data from this study, as well as from Bermuda (Minnebo et al., 2024; Zhang et al., 2021). The ‘later’ and ‘earlier’ ages within MIS 5e refer to Reef II and Reef I, respectively, for Bahamas data.
Ian Winkelstern +6 more
wiley +1 more source
Mechanisms of near‐normal sea water dolomitisation: Mesohaline‐reflux or syn‐depositional?
The Depositional Record, Volume 12, Issue 1, February 2026.This study investigates the dolomitisation of the Eocene Dammam Formation on the Arabian Plate using petrographic, mineralogical, geochemical and isotopic analyses. The findings reveal two distinct dolomite types, formed primarily through normal‐to‐mesohaline sea water dolomitisation, challenging previous models such as sabkha‐meteoric mixing.
Misbahu Abdullahi +3 more
wiley +1 more source