Results 61 to 70 of about 18,181 (272)

SALINE DEPOSITS AND ALKALINE MAGMAT1SM:A GENETIC MODEL [PDF]

Journal of Sciences, Islamic Republic of Iran, 1990
The temporal-spatial coincidence of saline deposits with rifting and alkaline magmatism has now become a commonly accepted fact. The congruency of these three phenomena implies logically, their trilateral genetic interrelation.
doaj  

The development of magmatism along the Cameroon Volcanic Line: evidence from seismicity and seismic anisotropy [PDF]

, 2014
The Cameroon Volcanic Line (CVL) straddles the continent-ocean boundary in West Africa but exhibits no clear age progression. This renders it difficult to explain by traditional plume/plate motion hypotheses; thus, there remains no consensus on the ...
Bastow, I.D., Chambers, E.L., De Plaen, R.S.M., Gallacher, R.J., Keane, J., Keir, D.   +5 more
core   +1 more source

GEOCHRONOLOGY OF ALKALINE ROCKS FROM THE BURPALA MASSIF (NORTHERN PRIBAIKALYE): NEW U-Pb DATA

Геодинамика и тектонофизика
Geochronological studies have been made on the main types of rocks from the Burpala alkaline massif and two gabbro and gabbro-diorite dikes located nearby.
I. А. Izbrodin, А. G. Doroshkevich, А. V. Malyutina, D. V. Semenova, Т. А. Radomskaya, М. N. Kruk, I. R. Prokopyev, А. Е. Starikova, М. О. Rampilov   +8 more
doaj   +1 more source

Paleomagnetism, rock magnetism and geochemical aspects of early Cretaceous basalts of the Paraná Magmatic Province, from Misiones, Argentina [PDF]

, 2006
The basalts of the Posadas Formation were extruded during the huge continental volcanism that affected the Parana Basin in the Lower Cretaceous. We have carried out a paleomagnetic and rock-magnetic study on samples collected along a basalt outcrop ...
Lagorio, Silvia Leonor, Mena, Mabel, Orgeira, Maria Julia   +2 more
core   +1 more source

AGE OF THE AMNUNAKTA MONZOGABBRO-MONZODIORITE MASSIF IN THE SOUTHERN FRAMING OF THE SIBERIAN CRATON

Геодинамика и тектонофизика, 2020
The first geochronological data have been obtained for Amnunakta massif composed of monzogabbro-monzodiorite and located in the southeastern part of the Selenga-Stanovoy superterrane.
I. V. Buchko, A. A. Rodionov, E. B. Salnikova   +2 more
doaj   +1 more source

First evidence of lamprophyric magmatism within the Subbetic Zone (Southern Spain) [PDF]

, 2010
Two drillings carried out at Cerro Prieto (Province of Málaga), together with additional geophysical data, revealed the existence of an igneous body formed of rock-types previously unknown in the Subbetic zone.
Beccaluva, Luigi, Bianchini, Gianluca, Díaz de Federico, Antonio, Díaz Puga, Miguel Ángel, Galindo Zaldívar, Jesús, Puga, Encarnación, Wijbrans, Jan, Álvarez Valero, Antonio Miguel   +7 more
core   +9 more sources

Slab‐Mantle Interaction During Subduction Initiation: Constraints From Trace Element and Sr‐Nd‐Pb Isotope Systematics of Boninite and Other Magmas and Metamorphic Sole in the Oman Ophiolite

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Late Cretaceous Oman ophiolite includes a series of volcanic rocks generated during the transition from spreading ridge to protoarc associated with subduction initiation. We analyzed major and trace elements and Sr, Nd, and Pb isotope compositions of lavas and dikes of the protoarc stage, especially boninites. We also analyzed amphibolites
Tsuyoshi Ishikawa, Kazuya Nagaishi, Kyoko Kanayama, Keitaro Kitamura, Shigeyuki Wakaki, Yuki Kusano, Susumu Umino   +6 more
wiley   +1 more source

The evolution of Neoproterozoic magmatism in Southernmost Brazil: shoshonitic, high-K tholeiitic and silica-saturated, sodic alkaline volcanism in post-collisional basins

Anais da Academia Brasileira de Ciências, 2006
The Neoproterozoic shoshonitic and mildly alkaline bimodal volcanism of Southernmost Brazil is represented by rock assemblages associated to sedimentary successions, deposited in strike-slip basins formed at the post-collisional stages of the Brasilian ...
Sommer Carlos A., Lima Evandro F., Nardi Lauro V. S., Liz Joaquim D., Waichel Breno L.   +4 more
doaj  

Miocene Alkaline Basaltic Magmatism in Northeastern Tibetan Plateau: Implications for Mantle Evolution and Plateau Outward Growth

Geochemistry, Geophysics, Geosystems
The widespread Cenozoic alkaline magmatism within and around the Tibetan Plateau offers a prime opportunity to probe the nature of the mantle at the depths where basalt magmas originate.
Yue Che, Dong Liu, Zhidan Zhao, Yaoling Niu, Fang‐Zhen Teng, Donald J. DePaolo, Xuehui Yu, Di‐Cheng Zhu, Ningyuan Qi, Xuanxue Mo   +9 more
doaj   +1 more source

The Borrachudos Granitic Suite: Paleo- to Mesoproterozoic A-type Magmatism in the Southeastern São Francisco Craton (SE Brazil) [PDF]

Anais da Academia Brasileira de Ciências
The Borrachudos Granitic Suite (BGS) comprises an acid magmatism that occurred in the west edge of Araçuaí orogen (Late Neoproterozoic), southeastern Brazil.
IVO ANTONIO DUSSIN, MARIO LUIZ S.C. CHAVES, TANIA MARA DUSSIN, PHILLIPPE ROSSI, JACQUES CHARVET   +4 more
doaj   +1 more source