Results 61 to 70 of about 370 (183)

The Cristalino IOCG deposit: an example of multi-stage events of hydrothermal alteration and copper mineralization

Brazilian Journal of Geology, 2019
The Cristalino deposit is located 40 km east of Sossego mine, Carajás. The orebody lies along a NW-SE-striking shear zone and is mainly hosted by the Neoarchean bi-modal volcanics of the Grão Pará Group.
Gustavo Souza Craveiro, Roberto Perez Xavier, Raimundo Netuno Nobre Villas   +2 more
doaj   +1 more source

Characteristics and geological significance of geochronologic results from the Bayan Obo deposit, Inner Mongolia

地质科技通报
Objective The Bayan Obo deposit in Inner Mongolia is a rare superlarge REE-Nb-Fe polymetallic deposit worldwide. There are still controversies on the timing of REE mineralization in the deposit due to the complex geological evolution in the region ...
Biao CHEN, Xiaoqi JIA, Wei WEI, Hailong JIN   +3 more
doaj   +1 more source

Lamprophyres of the Peshchernoe gold deposit, their geological position, material composition, and metasomatic alterations (Northern Urals)

Записки Горного института
The article presents the first data on biotite-hornblende lamprophyres discovered at the Peshchernoe gold deposit. We consider the geological position of lamprophyre dikes in the deposit structure and the relationship of these rocks with tectonically ...
Dmitrii V. Kuznetsov, Sergei Yu. Stepanov, Andrei V. Butnyakov, Viktoriya S. Igosheva   +3 more
doaj  

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

Crystals
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, Siyi Zhao, Yi Zhao, Zisheng Wang   +3 more
doaj   +1 more source

Geochemical, O-H-Sr Isotopic, and Thermodynamic Insights into the Metasomatic and Metamorphic Evolution of the Saxothuringian Crust: The Case of the Kowadło Ultramafic Suite (SW Poland) [PDF]

Lithosphere
The Orlica-Śnieżnik Dome in the Bohemian Massif represents a key window into the tectonic and geochemical evolution of the Saxothuringian continental crust, exemplified by the stratified Kowadło ultramafic suite.
Mohamed M. Hamdy, Basem A. Zoheir, Thomas C. Meisel, Hamed Gamaleldien, El Saeed R. Lasheen, Tamer S. Abu-Alam   +5 more
doaj   +1 more source

Near vein metasomatism along propylitic veins in the Baksa Gneiss Complex, Pannonian Basin, Hungary

Geologia Croatica, 2010
In many parts of the metapelitic (gneiss, mica schist) rock section of the Baksa Complex, significant wall-rock alteration is observable along the Ca-Al silicate veins, which show a di → ep ± czo →sp → ab ± kfs → chl → adu → prh → py → cal mineral ...
Krisztian Fintor, Tivadar M. Tóth, Félix Schubert   +2 more
doaj   +1 more source

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

International 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, Jaehyung Yu, Lei Wang, Trung Hieu Pham, Jin-Young Lee   +4 more
doaj   +1 more source

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

Yankuang 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, LI Li, ZHANG Chang-qing   +2 more
doaj  

ALKALIC-METASOMATISM AND REDISTRIBUTION OF U, TH AND REE IN THE HYDROTHERMALLY ALTERED GRANITE OF GABAL ABU HARBA, NORTH EASTERN DESERT, EGYPT [PDF]

, 2013
ABDEL AZEEM RASHWAN, Mahmoud H. Shalaby, MOHAMED ROZ, Mohamed A. Wetait, Amr Abdel Hamid   +4 more
openalex   +1 more source

Hydrothermal Metasomatism and Gold Mineralization of Porphyritic Granite in the Dongping Deposit, North Hebei, China: Evidence from Zircon Dating [PDF]

, 2018
Wei Hao, Jiuhua Xu, Guorui Zhang, Xihui Cheng, Haixia Chu, Chunjing Bian, Zeyang Zhang   +6 more
openalex   +1 more source