Results 21 to 30 of about 46,759 (117)

K‐Rich Adakite‐Like Rocks in Central Tibet: Fractional Crystallization of a Hydrous, Alkaline Primitive Melt

Geophysical Research Letters, Volume 50, Issue 10, 28 May 2023., 2023
Abstract K‐rich adakite‐like rocks (KARs) in post‐collisional settings, such as in Tibet, have been widely linked with the melting of pre‐existing thickened crust. Here, we investigate geochemical data of the Late Eocene (38–34 Ma) volcanic rocks including KARs from the southern Qiangtang terrane (SQT) of central Tibet.
Wei Xu, Roberto F. Weinberg, Shi‐Hong Tian, Zeng‐Qian Hou, Zhu‐Sen Yang, Lu Chen, Feng Lai   +6 more
wiley   +1 more source

Geochronology and petrogenesis of granitoids and associated mafic enclaves from Ghohroud in the Urumieh–Dokhtar Magmatic Arc (Iran): Evidence for magma mixing during the closure of the Neotethyan Ocean

Geological Journal, Volume 57, Issue 8, Page 3313-3332, August 2022., 2022
A comprehensive dataset from petrographic characteristics to geochemical compositions of the mafic microgranular enclaves and granitoid host rocks from the Urumieh–Dokhtar Magmatic Arc (Iran) was presented. The new data provide significant insight into the evolution of magmatism in this area, which was tightly related to the Neotethyan closure.
Tayebeh Khaksar, Nematollah Rashidnejad‐Omran, Shuang‐Qing Li, Shu‐Guang Song, Ali Kananian, Fukun Chen, Su Li   +6 more
wiley   +1 more source

A window into an older orogenic cycle: P–T conditions and timing of the pre‐Alpine history of the Dora‐Maira Massif (Western Alps)

Journal of Metamorphic Geology, Volume 40, Issue 4, Page 789-821, May 2022., 2022
Abstract Deciphering the pre‐orogenic evolution of subducted continental basement is challenging due to pervasive reworking of crust during subduction and exhumation. Survival of such polycyclic basement may occur locally in low strain domains bounded by intensely overprinted rocks.
Francesco Nosenzo, Paola Manzotti, Marc Poujol, Michel Ballèvre, Jessica Langlade   +4 more
wiley   +1 more source

Supplemental material: Cogenetic origin of mafic microgranular enclaves in calc-alkaline granitoids: The Permian plutons in the northern North China Block

, 2017
Geosphere, April 2017, v. 13, p. 482-517, doi:10.1130/GES01407.1, Supplemental Table 3 - Hornblende compositions of the Permian granitoids and their mafic microgranular ...
Yue Zhao (186573), Shuan-Hong Zhang (619905)   +1 more
core   +3 more sources

Field Evidence of Magma Mixing from Concentric Zoning and Mafic Microgranular Enclaves in Bunam Stock, Korea

The Journal of the Petrological Society of Korea, 2016
Sang Koo Hwang
exaly   +3 more sources

Triaxial Compression Testing of Multicomponent Geomaterials from Quartz-Poor (Syenitic) Systems

GeoScience Engineering, 2017
This paper focuses on mafic microgranular enclaves enclosed in quartz-poor igneous rocks and their effect on strength properties of the rock massif. The study examines host rock–enclave multicomponent geomaterials from enclave-bearing syenitic rocks from
Krmíček Lukáš, Závacký Martin
doaj   +1 more source

Supplemental Material: Mafic microgranular enclaves (MMEs) trace the origin of post-collisional magmas

, 2023
<p>Rock analyses, sample photographs, sampling and analytical methods, additional Harker diagrams, and extended discussion for geochemical modeling. </p>
Antonio Castro, Daniel Gómez-Frutos
openaire   +1 more source

Zinc Contents of Mafic Micerals in Granitic Rocks, with Special Reference to Ore Chemistry [PDF]

, 2003
In order to know the reason why the Cu/Zn-Pb ratios of skarn-type deposits related with the ilmenite-series granitic rocks are markedly higher than those related with the magnetite-series, comparative mineralogical studies were carried out for the two ...
Inoue, Yoshinori, Tomiya, Hisashi, Kase, Katsuo   +2 more
core   +1 more source

Mafic mineral clots and microgranular enclaves in A-type Hiltaba Suite granites from the Gawler Craton, South Australia: Origins and implications

, 2023
The origins of mafic mineral clots and microgranular enclaves in Mesoproterozoic granites were investigated in a case study of felsic A-type Hiltaba Suite granites from the Gawler Craton, South Australia.
Kontonikas-Charos, A., Ciobanu, Cristiana L., Kontonikas-Charos, Alkiviadis, Cook, Nigel J., Ehrig, K., Ehrig, Kathy, Cook, N.J., Ciobanu, C.L.   +7 more
core   +1 more source

Sr and Nd isotopic investigations towards the origin of feldspar megacrysts in microgranular enclaves in two I-type plutons of the Lachlan Fold Belt, southeast Australia

, 2000
New Sr and Na isotopic cata are presented for several large feldspar crystals occurring in microgranular enclaves in the Swifts Creek and Bricle Track biutons, along with analyses of their host enclave grounamass and adjacent granitoid.
Maas, R., Dean, A. A., Nicholls, I. A., Waight, T. E.   +3 more
core   +1 more source