Results 1 to 10 of about 884,714 (212)

Climate and geology overwrite land use effects on soil organic nitrogen cycling on a continental scale [PDF]

open access: yesBiogeosciences, 2022
Soil fertility and plant productivity are globally constrained by N availability. Proteins are the largest N reservoir in soils, and the cleavage of proteins into small peptides and amino acids has been shown to be the rate-limiting step in the ...
L. Noll   +7 more
doaj   +2 more sources

Structural framework and timing of the Pahtohavare Cu ± Au deposits, Kiruna mining district, Sweden [PDF]

open access: yesSolid Earth, 2023
As part of the larger mineral systems approach to Cu-bearing mineralization in northern Norrbotten, this study utilizes structural geology to set the classic Pahtohavare Cu ± Au deposits into an up-to-date tectonic framework.
L. Logan   +4 more
doaj   +1 more source

Mineral chemistry and geothermometry of chlorite in Dalayon Area (East of Dorud- Sanandaj-Sirjan Zone) [PDF]

open access: yesپترولوژی, 2023
The main aim of this paper is to identify the formation environment and the physicochemical conditions of chlorite minerals in Dalayon area by their mineralogical and geochemical features (Ciesielczuk, 2002).
SeyedVahid Shahrokhi
doaj   +1 more source

Crystal characteristics of fibrous calcite veins based on Electron Back Scattered Diffraction (EBSD)

open access: yesShiyou shiyan dizhi, 2022
Calcite veins are widely developed in organic-rich shale, and their petrological characteristics and genetic mechanism are the focus of research. The Electron Back Scatter Diffraction (EBSD) can characterize the micro-structure and orientation of mineral
Lanquan ZHAO   +8 more
doaj   +1 more source

SHORT NOTES ON THE SHIMSHAL VALLEY GEOLOGY (WESTERN KARAKORUM-PAKISTAN)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
A geological reconnaissance carried out during Summer 1982 along the lower and middle Shimshal Valley allows to identify some lithostratigraphic units madc up of slates (shaly and sandy deep— sea turbidites), shelf limestones and dolomites.
R. Casnedi, A. Nicora
semanticscholar   +1 more source

Gradational development of slaty cleavage to schistosity -an example from the Iberian Pyrite Belt, Spain- [PDF]

open access: yes, 1994
The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable.
Suzuki, shigeyuki
core   +1 more source

Deformation in Moffat Shale detachment zones in the western part of the Scottish Southern Uplands [PDF]

open access: yes, 2004
A study of the décollement zones in the Moffat Shale Group in the Ordovician Northern Belt of the Southern Uplands of Scotland reveals a progressive sequence of deformation and increased channelization of fluid flow.
Needham, D.T.
core   +1 more source

The Mesozoic along-strike tectono-metamorphic segmentation of Longmen Shan (eastern Tibetan plateau) [PDF]

open access: yes, 2018
The Longmen Shan belt (eastern border of the Tibetan plateau) constitutes a tectonically active region as demonstrated by the occurrence of the unexpected 2008 Mw 7.9 Wenchuan and 2013 Mw 6.6 Lushan earthquakes in the central and southern parts of the ...
A. Robert   +80 more
core   +2 more sources

Structural history of the southwestern corner of the Kaapvaal Craton and the adjacent Namaqua realm: new observations and a reappraisal [PDF]

open access: yes, 1991
The rocks along the southwestern margin of the Kaapvaal Craton were deformed up to 7 times during the Early to Middle Proterozoic. The oldest deformation D1 is recorded in the N-S-trending Uitkoms cataclasite of pre-Makganyene age (>2.24 Ga) on the ...
Altermann, Wladyslaw, Hälbich, Ingo W.
core   +1 more source

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