Results 111 to 120 of about 220,175 (263)

Trapiche Garnets in Chun’an, Zhejiang Province, China: New Constraints from Their Gemology, Geochemistry, and Geochronology

open access: yesCrystals
The trapiche garnet, a gemstone of unparalleled beauty, boasts a rare structure comprising one core, six radiating arms, and a main body. The occurrence of garnet within the trapiche structure elevates it beyond the species, granting it significant ...
Yingzhao Wang   +3 more
doaj   +1 more source

Tin Abundances Require that Chassignites Originated from Multiple Magmatic Bodies Distinct from Nakhlites [PDF]

open access: yes
Meteorites from Mars lack field context but chemical and chronologic studies have revealed remarkable links between nakhlites and chassignites. A widely held consensus is that nakhlites and chassignites originated from a large, single differentiated flow
Hewins, R. H.   +6 more
core   +1 more source

The common origin and alteration history of the hypabyssal and volcanic phases of the Wadi Tarr albitite complex, southern Sinai, Egypt [PDF]

open access: yes, 2019
New data and interpretations are presented for the igneous albitites of the Wadi Tarr area, southern Sinai, Egypt. The albitite masses are isolated in outcrop from any granitic intrusions and have intrusive contacts against the country rocks without any ...
Al-Kahtany, Khaled M.   +3 more
core  

Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
This study presents an innovative solution for detecting complex geological formations, particularly in areas where field surveys are difficult or impossible.
Huy Hoa Huynh   +4 more
doaj   +1 more source

Detrital zircon from a late Paleozoic accretionary complex of SW Iberia (Variscan Belt): History of crustal growth and recycling at the Rheic convergent margin [PDF]

open access: yes, 2012
In this study we present new U-Pb ages of detrital zircons from greywackes and quartzites of the Pulo do Lobo Anticline (PLA) that have been interpreted to represent a Late Paleozoic accretionary complex in SW Iberia.
Chichorro, M.   +4 more
core  

A Study on Rare Earth Elements Geochemistry of the Makeng Skarn Fe-Mo Deposit and Its Geological Significance in Fujian Province

open access: yesYankuang ceshi, 2013
The Makeng Fe-Mo deposit is a large skarn-type magnetite deposit hosted by interbedded structural fracture zone between limestone in the Huanglong formation (C2h) and clastic rocks in the Lindi formation (C1l) in the vicinity of the outer aureole of the ...
ZHANG Cheng-shuai   +2 more
doaj  

An occurence of metasomatic aujminosilicates related to high alumina hydrothermal alteration within the South Mountain Batholith, Nova Scotia

open access: yesAtlantic Geology, 1988
A zone of high alumina hydrothermal alteration (HAHA) is documented within granitoid rocks of the Big Indian Polyphase Intrusive suite (BIPI suite), which forms part of the Late Devonian-Early Carboniferous South Mountain Batholith (SHB). The alteration, which la confined to a NE-trending shear zone, is characterized by the quartz-deficient mineral ...
openaire   +3 more sources

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

open access: yes
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

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