Results 51 to 60 of about 7,444 (188)

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

open access: yesGeological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang   +3 more
wiley   +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

Microfacies Analysis and Depositional Environments of Lower Sa’adi Formation, Southern Iraq

open access: yesIraqi Geological Journal, 2022
The Sa’adi Formation is a part of the late Cretaceous period in the Santonian-Campanian stage that represents a potential hydrocarbon-bearing reservoir across many oilfields in the Mesopotamian Basin, South of Iraq.
Adyan A. Myzban   +2 more
doaj   +1 more source

Petrología sedimentaria. Notas de teoría. 1. Introducción [PDF]

open access: yes, 2010
La Petrología Sedimentaria es la ciencia que estudia todos sedimentos y rocas que se generan en ambiente exógeno y por tanto todos los procesos que conducen a la formación de dichas rocas y sedimentos.
Alonso-Zarza, Ana María
core   +1 more source

Molecular Palaeontology Prospects From Exceptionally Preserved Eocene Brackish‐Water Bivalve Batissa sitakaraensis (Venerida: Corbiculidae) From Hokkaido, Japan

open access: yesGeological Journal, EarlyView.
This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura   +4 more
wiley   +1 more source

Facies analysis of the Asmari Formation in central and north-central Zagros basin, southwest Iran: Biostratigraphy, paleoecology and diagenesis

open access: yesRevista Mexicana de Ciencias Geológicas, 2014
Tres secciones de la Formación Asmari del Oligoceno-Mioceno, que cruza la region central y nor-central de la Cuenca de Zagros en el SE de Irán, fueron medidas y estudiadas, a fin de interpretar su bioestratigrafía, paleoecología (con base en la ...
Hossein Vaziri-Moghaddam   +2 more
doaj  

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

Decoupling climate and human impacts on the nitrogen cycle during the Irish Bronze Age

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Disentangling climate variability and human activity in past nitrogen cycling is key to understanding ecosystems. Previous studies in Ireland observed a widespread, permanent shift in terrestrial nitrogen cycling during Later Prehistory, potentially linked to intensifying land‐use.
Sarah Ferrandin   +2 more
wiley   +1 more source

Tafonomía y fosilización [PDF]

open access: yes, 1999
Depto. de Geodinámica, Estratigrafía y PaleontologíaFac.
Fernández López, Sixto Rafael
core  

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