Results 71 to 80 of about 253 (188)

Crustal Architecture of the Paleo‐Pacific Rift Margin of East Antarctica: Evidence From U‐Pb Ages and O‐Hf Isotope Compositions of Ross Orogen Granitoids

Geochemistry, Geophysics, Geosystems
Granitic batholiths of the ∼500 Ma Ross Orogen in Antarctica are voluminous in scale, reflecting prolific magmatism along the active early Paleozoic convergent margin of Gondwana.
John W. Goodge, C. Mark Fanning, Christopher M. Fisher, Jeffrey D. Vervoort   +3 more
doaj   +1 more source

A preserved early Ediacaran magmatic arc at the northernmost portion of the Transversal Zone central subprovince of the Borborema Province, Northeastern South America

Brazilian Journal of Geology
: Magmatic arcs are an essential part of crust-forming events in planet Earth evolution. The aim of this work was to describe an early Ediacaran magmatic arc (ca.
Benjamim Bley de Brito Neves, Edilton José dos Santos, Reinhardt Adolfo Fuck, Lauro César Montefalco Lira Santos   +3 more
doaj   +1 more source

Petrogenesis of the Late Ordovician Penggongmiao biotite monzogranite in southern Hunan, south China: constraints from geochronology, geochemistry, and Sr–Nd–Hf isotopes

Frontiers in Earth Science
The Penggongmiao complex pluton, located in the Nanling metallogenic belt of South China, provides a critical record of Early Paleozoic (Caledonian) magmatism, but the genesis and mineralization potential of the biotite monzogranite of the pluton have ...
Chenghua Shi, Zhibiao Zhu, Xinyu Zhou, Jiabin Chen   +3 more
doaj   +1 more source

1.90-1.88Ga arc magmatism of central Fennoscandia: geochemistry, U-Pb geochronology, Sm-Nd and Lu-Hf isotope systematics of plutonic-volcanic rocks from southern Finland

Geologica Acta, 2016
The earliest Svecofennian magmatism in southern Finland has been dated at 1.90-1.88Ga. As an example of this, the Orijärvi (ca. 1.89Ga) and Enklinge (ca.
J. KARA, M. VÄISÄNEN, Å. JOHANSSON, Y. LAHAYE, H. O'BRIEN, O. EKLUND   +5 more
doaj  

Petrogenesis and Tectonic Evolution of Cenozoic Magmatism in the Southernmost Northern Andes: Insights From Zircon Petrochronology

Geochemistry, Geophysics, Geosystems
This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma.
J. Iglesias, C. Witt, L. C. Sandoval Espinel, M. Zattin, M. Poujol, O. Bruguier, O. Poma, M. J. Hernández, O. Averbuch, M. Seyler, D. Bosch, F. Chanier, S. Ventalon, C. Liorzou, V. Bosse   +14 more
doaj   +1 more source

Hybridization between I-type and S-type granites in the ordovician famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina

Geologica Acta, 2018
In the Tafí del Valle region, in northwestern Argentina, several intrusive bodies of lower Paleozoic age were emplaced in the metasedimentary Puncoviscana Formation, belonging to the Sierras Pampeanas. Four intrusive bodies outcrop in the study area: La
J.P. LÓPEZ, L.I. BELLOS, J. DÍAZ-ALVARADO, A. CASTRO   +3 more
doaj  

The Roles of Transcrustal Magma- and Fluid-Conducting Faults in the Formation of Mineral Deposits

Geosciences
In this article, we consider the roles of transcrustal magma- and fluid-conducting faults (TCMFCFs) in the formation of mineral deposits, showing the importance of deep sources of heat and hydrothermal solutions in the genesis and history of deposit ...
Farida Issatayeva, Auez Abetov, Gulzada Umirova, Aigerim Abdullina, Zhanibek Mustafin, Oleksii Karpenko   +5 more
doaj   +1 more source

SHRIMP U-Pb Geochronology of the Socorro Batholith and implications for the Neoproterozoic evolution in SE Brazil

Brazilian Journal of Geology
: The Socorro Batholith is one of the most expressive granite manifestations associated with the Neoproterozoic evolution in SE Brazil, occupying large areas (~1,200 km 2 ) in the southern portion of the Socorro-Guaxupé Nappe.
Bárbara Bueno Toledo, Valdecir de Assis Janasi, Luiz Gustavo Ribeiro da Silva   +2 more
doaj   +1 more source

The Exotic Igneous Clasts Attributed to the Cuman Cordillera: Insights into the Makeup of a Cadomian/Pan-African Basement Covered by the Moldavides of the Eastern Carpathians, Romania

Geosciences
The Eastern Carpathians are thrust to the east and north over their Eastern European foreland, tectonically covering it over an area several hundred kilometers across. Information about the nature of the underthrust part of the Carpathian foreland can be
Sarolta Lőrincz, Marian Munteanu, Ştefan Marincea, Relu Dumitru Roban, Valentina Maria Cetean, George Dincă, Mihaela Melinte-Dobrinescu   +6 more
doaj   +1 more source

Interplay between oceanic subduction and continental collision in building continental crust. [PDF]

Nat Commun, 2022
Zhu DC, Wang Q, Weinberg RF, Cawood PA, Chung SL, Zheng YF, Zhao Z, Hou ZQ, Mo XX.   +8 more
europepmc   +1 more source