Results 41 to 50 of about 21,432 (228)

Tectonic overview of the West Gondwana margin [PDF]

open access: yes, 2008
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental ...
Pankhurst, Robert J., Vaughan, Alan P.M.
core   +1 more source

Malignant melanoma of the urethra: a rare histologic subdivision of vulvar cancer with a poor prognosis [PDF]

open access: yes, 2012
Malignant melanoma of the urethra is a rare tumour that is difficult to diagnose and treat, resulting in a poor prognosis. In this paper, we present the case of a 65-year-old woman who was referred to a gynaecologist because of a urethral mass that ...
Alkatout, Ibrahim   +8 more
core   +2 more sources

Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]

open access: yesBulletin of the Geological Society of Finland
In this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola   +2 more
doaj   +1 more source

A Late-Miocene Yuli belt? New constraints on the eastern Central Range depositional ages

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2020
In Taiwan’s Central Range mountains, fundamental constraints on depositional ages and the timing of deformation and metamorphism remain a problematic issue preventing a consensual chronology of orogenic events to be established.
Lucas Mesalles   +5 more
doaj   +1 more source

Circum-Arctic lithosphere-basin evolution : An overview [PDF]

open access: yes, 2016
Acknowledgements The Special Issue editors thank the contributors for their hard work and dedication in the preparation of the papers presented here, and also Victoria Pease for her active support throughout the process and in particular in co-convening ...
Lane, Larry S., Stephenson, Randell A.
core   +1 more source

Deconvolving the pre-Himalayan Indian margin – tales of crustal growth and destruction [PDF]

open access: yes, 2018
The metamorphic core of the Himalaya is composed of Indian cratonic rocks with two distinct crustal affinities that are defined by radiogenic isotopic geochemistry and detrital zircon age spectra.
Ahmad   +132 more
core   +4 more sources

Congo River sand and the equatorial quartz factory [PDF]

open access: yes, 2019
A never solved problem in sedimentary petrology is the origin of sandstone consisting exclusively of quartz and most durable heavy minerals. The Congo River offers an excellent test case to investigate under which tectonic, geomorphological, climatic ...
Andò, Sergio   +10 more
core   +1 more source

A Reproducible SEM Surface Imaging Protocol for Monitoring Microstructural Changes During Gas–Rock Interactions

open access: yesGreenhouse Gases: Science and Technology, EarlyView.
ABSTRACT Reliable characterization of mineralogical and textural changes in rock samples is essential for understanding fluid–rock interactions, particularly in experimental studies simulating subsurface conditions. This study presents a reproducible protocol for scanning electron microscopy (SEM) analysis of rock surfaces before and after exposure to ...
Berta Ordóñez‐Casado   +3 more
wiley   +1 more source

A brief introduction to the detrital zircon U–Pb and Hf isotopic datasets for mainland China and adjacent regions

open access: yesGeoscience Data Journal
Improvements in analytical technique and data processing lead to a large deposit of detrital zircon U–Pb and Hf isotopic data in published journal articles, thesis and reports.
Jianghai Yang   +3 more
doaj   +1 more source

Thermochronology of the modern Indus River bedload: New insight into the controls on the marine stratigraphic record [PDF]

open access: yes, 2004
The Indus River is the only major drainage in the western Himalaya and delivers a long geological record of continental erosion to the Arabian Sea, which may be deciphered and used to reconstruct orogenic growth if the modern bedload can be related to ...
Ali Athar Khan   +90 more
core   +2 more sources

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