Results 41 to 50 of about 6,151 (175)

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges   +5 more
wiley   +1 more source

Semantic Segmentation of Pegmatite Dikes in High-Resolution Remote Sensing Imagery Using GAD-UNet++ in the Yilanlike Area, South Tianshan

open access: yesRemote Sensing
Pegmatite dikes are important prospecting indicators for rare-metal deposits, whereas traditional methods for pegmatite dike identification are constrained by the limited capability of human visual interpretation to capture information from remote ...
Zirui Wu   +5 more
doaj   +1 more source

Prospecting of rare metals in the East-Ukrainian pegmatitе province – important part of geological exploration in Ukraine

open access: yesМінеральні ресурси України, 2021
Nowadays, there has significantly increased the interest of industry in rare metal mineralization in pegmatites, which determines their importance as raw materials for “critical elements” Ta, Nb, Li, Be, Sn, Y, TR, etc., and thus there is a need to re ...
V. V. Sukach   +3 more
doaj   +1 more source

The anatomy of an albite-type granitic pegmatite from the Totoral pegmatite field, San Luis, Argentina [PDF]

open access: yes, 2015
The Independencia Argentina albite-type granitic pegmatite is the most distal differentiate in the Cerro La Torre pegmatite group, located in the Eastern Pampean Ranges of Argentina.
Cerný, Petr   +4 more
core   +1 more source

Maine Pegmatite Mines and Prospects and Associated Minerals [PDF]

open access: yes, 1957
Maine Pegmatite Mines and Prospects and Associated Minerals Minerals Resources Index No.1 - Maine Geological Survey Department of Development of Industry and Commerce, Augusta, Maine (March 1, 1957). Contents: Introduction / Acknowledgments / Explanatory
Maine Geological Survey
core   +1 more source

Provenance of Middle Triassic sediments in the Southern Youjiang Basin: Insights from detrital zircon geochronology and tourmaline geochemistry

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
Middle Triassic turbidites in the Youjiang Basin were chiefly derived from a Late Palaeozoic continental arc along the southeastern South China Block, as revealed by detrital zircon U–Pb geochronology and tourmaline geochemistry, supporting a tectonic model driven by Paleo‐Pacific subduction rather than Paleo‐Tethyan closure.
Yumei Wei, Lanqiu Meng, Yu Zhang
wiley   +1 more source

Exhumation of the Koktokay rare-metal pegmatite group in the China Altai: insights from low-temperature thermochronology of the No. 3 pegmatite and Aler S-type granitic batholith

open access: yesFrontiers in Earth Science
The China Koktokay Pegmatite Group is an important metallogenic region where major rare-metal ores are mined. Here, we present new low-temperature thermochronological data to contribute to the understanding of the Koktokay Pegmatite Group’s exhumation ...
Haoyu Wang   +6 more
doaj   +1 more source

Do Pegmatites Crystallise Fast? A Perspective from Petrologically-Constrained Isotopic Dating

open access: yesGeosciences, 2023
Most recent studies consider the formation of individual pegmatite bodies to be a fast process with estimated crystal growth rates reaching a walloping 10 m/day. This opinion is presumably underpinned by the traditional way of thinking of them as the end
Daniil V. Popov
doaj   +1 more source

Assessment and Correction of Non‐Linearity Effects for In Situ Rb‐Sr Geochronology Applied to High 87Rb/86Sr Mica

open access: yesGeostandards and Geoanalytical Research, Volume 50, Issue 3, Page 601-624, September 2026.
Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts   +5 more
wiley   +1 more source

A new occurrence of samuelsonite in the Buranga Pegmatite, Rwanda [PDF]

open access: yesBulletin of the Geological Society of Finland, 1992
A new occurrence of the rare mineral species, samuelsonite, is reported from the Buranga pegmatite, Rwanda, in close association with gatumbaite and burangaite, as aggregates of bladed crystals imbedded in trolleite and in bertossaite.
A.-M. Fransolet   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy