Results 41 to 50 of about 84,949 (349)

Rock Acoustics of Diagenesis and Cementation

open access: yesPure and Applied Geophysics, 2021
We simulate the effects of diagenesis, cementation and compaction on the elastic properties of shales and sandstones with four different petro-elastical theories and a basin-evolution model, based on constant heating and sedimentation rates. We consider shales composed of clay minerals, mainly smectite and illite, depending on the burial depth, and the
José M. Carcione   +5 more
openaire   +4 more sources

Amino acid racemization dating of marine shells: a mound of possibilities [PDF]

open access: yes, 2007
Shell middens are one of the most important and widespread indicators for human exploitation of marine resources and occupation of coastal environments. Establishing an accurate and reliable chronology for these deposits has fundamental implications for ...
Bailey, Geoffrey N.   +5 more
core   +4 more sources

Sea level, carbonate mineralogy, and early diagenesis controlled δ13C records in Upper Ordovician carbonates

open access: yes, 2020
Stratigraphic variability in the geochemistry of sedimentary rocks provides critical data for interpreting paleoenvironmental change throughout Earth history.
David S. Jones   +4 more
semanticscholar   +1 more source

Litofasies dan Diagenesis Batugamping Formasi Rajamandala di Lintasan Cikamuning

open access: yesEthos: Jurnal Penelitian dan Pengabdian kepada Masyarakat, 2020
. Limestone of Rajamandala Formation is one of formation that located in North West Java basin with Late Oligocene age based on  Martodjojo, 1984. Rajamandala Formation is well exposed in Padalarang area extends to Sukabumi area of West Java.
Wahyu Budhi Khorniawan
doaj   +1 more source

Comment on Martinez-Garcia et al. 'Heavy metals in human bones in different historical epochs'. [PDF]

open access: yes, 2006
Martínez-García et al. (Sci. Tot Env. 348:51–72) have examined heavy metal exposure of humans in the Cartagena region using analysis of archaeological bones.
Andrew Millard   +12 more
core   +4 more sources

Diagenesis and reservoir quality of the Upper Triassic Chang 6 member in Jingan Oilfield, Ordos Basin, China

open access: yesPetroleum, 2018
The Chang 6 reservoir of Yanchang formation in Jingan oilfield has relatively poor quality: the porosity ranges mainly from 8 to 14%, and permeability ranges from 0.018 to 10.48 md, with a mean of 1.10 md, categorized as low porosity and low permeability
Bin Li   +4 more
doaj   +1 more source

Petrophysical properties and their influencing factors of carbonates in the fourth member of Sinian Dengying Formation, Sichuan Basin, SW China

open access: yesPetroleum Exploration and Development, 2023
Based on the measurements of petrological, petrophysical and elastic properties of the samples of different sedimentary facies in the fourth member of Sinian Dengying Formation (Deng 4 Member) in the Sichuan Basin, the diagenetic processes of reservoirs ...
Jiaqing WANG   +4 more
doaj   +1 more source

Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral [PDF]

open access: yes, 2005
The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies.
Allison, N.   +5 more
core   +1 more source

Sedimentological, Diagenetic, and Sequence Stratigraphic Controls on the Shallow to Marginal Marine Carbonates of the Middle Jurassic Samana Suk Formation, North Pakistan

open access: yesJournal of Marine Science and Engineering, 2023
This study presents a thorough analysis of the sedimentology, diagenesis, and sequence stratigraphy of the Middle Jurassic Samana Suk Formation in the Hazara Basin of northern Pakistan.
Shazia Qamar   +5 more
doaj   +1 more source

Diagenetic Study of Marrón Emperador Ornamental Stone (Upper Cretaceous, SE Spain)

open access: yesApplied Sciences, 2023
The “Marrón Emperador” ornamental stone is known for its characteristic deep brown colour filled with white spots and veins. It consists of a brecciated dolostone with different generations of calcite/dolomite veins and veinlets that represent repeated ...
María Concepción Muñoz-Cervera   +1 more
doaj   +1 more source

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