Results 81 to 90 of about 2,212 (216)

Diorites as an intermediate in gold-producing fluid-magmatic granite-doleritic complexes

, 2007
On the example of the Kedrovskiy deposit of North Transbaikalia, conditions of gold-producing fluid-magmatic granite-dolerite complex's making are concretized.
Kucherenko, I. V.
core  

Lower crustal melting and the role of open-system processes in the genesis of syn-orogenic quartz diorite-granite-leucogranite associations: constraints from Sr-Nd-O isotopes from the Bandombaai Complex, Namibia

, 2003
The Bandombaai Complex (southern Kaoko Belt, Namibia) consists of three main intrusive rock types including metaluminous hornblende- and sphene-bearing quartz diorites, allanite-bearing granodiorites and granites, and peraluminous garnet- and muscovite ...
Hoffer, Edgar, Jung, Stefan, Masberg, Peter, Hoernes, Stephan, Schaltegger, Urs, van de Flierdt, Tina, Friedrichsen, Hans   +6 more
core   +1 more source

Geological Position of Rare-Metal Pegmatites of the Laghman Granitoid Complex, Afghanistan

Russian Journal of Earth Sciences
Rare-metal pegmatites containing industrial concentrations of lithium, tantalum, niobium, cesium, beryllium, and tin are becoming increasingly important as raw material objects for the production of electrical equipment, batteries, and electronics.
Evdokimov A. N., Yosufzai Ataullah
doaj   +1 more source

Paleostrukture of East Orenburg region

RUDN Journal of Engineering Research, 2018
The article states new views on structural features of East Orenburg Oblast. Results of long-term research of geological party of Mineral Deposits and their Investigation Department in RUDN formed the basis of writing the article. Unlike the predecessors
Victor V Diakonov, Alexander E Kotelnikov, Natalya V Zhorzh   +2 more
doaj   +1 more source

⁴⁰Ar/³⁹Ar age of gold-arsenic ores Vorontsovskoe gold deposit (the Northern Urals)

Литосфера, 2017
The subject of the study is gold-arsenic ores of the Vorontsovo gold deposit, belonging to the Carlin (Nevadian) type of mineralization. The deposit belongs to the large deposits class, it is localized near Auerbakh granitoid massif (diorites, quartz ...
V. Murzin Valery, A. Naumov Evgeny, Yu. Rovnushkin Mikhail, B. Azovskova Oksana   +3 more
doaj   +1 more source

Petrogenesis of the Early Paleozoic Dioritic–Granitic Magmatism in the Eastern North Qilian Orogen, NW China: Implications for Tethyan Tectonic Evolution [PDF]

Lithosphere
The North Qilian Orogen witnessed the opening, subduction, and closure of the Proto-Tethys Qilian Ocean and the post-subduction of multiple exhumation events from Late Neoproterozoic to Early Paleozoic.
Fei Xue, Fan Yang, Weidong Ren, M. Santosh, Zesheng Qian, Yin Huang, Zijian Tan   +6 more
doaj   +1 more source

Annotated record of the detailed examination of Mn deposits observed Mid-Atlantic Ridge at 45°N

, 1969
Diorites, associated with basalts, basalt breccias, and serpentinized peridotites, occur in situ on the faulted scarps of two seamounts from the western High Fractured Plateau of the Mid-Atlantic Ridge at 45 ...
Fabrizio Aumento (6886475), Aumento, Fabrizio   +1 more
core   +1 more source

Iron Isotopes Constrain the Metal Sources of Skarn Deposits: A Case Study from the Han-Xing Fe Deposit, China

, 2020
Magmatic fluids and leaching of rocks are regarded as the two sources of magmatic hydrothermal deposits, but their relative contributions to the metals in the deposits are still unclear.
Hongfu Zhang, Chunming Han, Bin Zhu, M. Santosh, Pengfei Zhang, Yongsheng He, Benxun Su   +6 more
core   +1 more source

Petrogenesis and tectonic implications of Early Paleozoic granitoids in the Baoshan deposit, Guangxi, South China

Frontiers in Earth Science
The Early Paleozoic tectonic setting and geological processes of the South China Block have long been a subject of debate. This study presented zircon U-Pb geochronology and Hf isotope, and whole-rock geochemical analyses for the Early Paleozoic ...
Puliang Lyu, Fang Liu, Ling Chen, Zhiguang Song, Wenen Ma, Yanlin Hou, Yanlin Hou   +6 more
doaj   +1 more source

Zircon U-Pb, geochemical and isotopic constraints on the age and origin of A- and I-type granites and gabbro-diorites from NW Iran

, 2020
The continental crust of NW Iran is intruded by Late Cretaceous I-type granites and gabbro-diorites as well as Paleocene A-type granites. SIMS and LA-ICPMS U-Pb analyses of zircons yield ages of 100-92 Ma (Late Cretaceous) for I-type granites and gabbro ...
Pourmohsen, Mehrdad, Ghorbani, Ghasem, O'Reilly, S. Y., Karsli, Orhan, Stern, Robert J., Moghadam, Hadi Shafaii, Griffin, William L., O'Reilly, S.Y., Karslı, Orhan, Chiaradia, Massimo, Li, Qiu-Li, Moghadam, HADY   +11 more
core   +1 more source