Results 71 to 80 of about 2,647 (217)

Microscale Hyperspectral Mapping of a Kilometer of Mantle Rocks: Insights Into Low‐Temperature Serpentinization Systems From the Oman Drilling Program Cores

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Characterizing products of water‐rock interactions in low‐temperature serpentinization of ultramafic rock is key to reconstructing fluid alteration histories of the crust and identifying subsurface habitable environments. We analyzed terrestrial peridotites from the Samail ophiolite using visible to near‐infrared (VNIR‐SWIR) microimaging ...
Lucia Mandon, Bethany L. Ehlmann, Rebecca N. Greenberger, Eric T. Ellison, Lisa E. Mayhew, Alexis S. Templeton   +5 more
wiley   +1 more source

Vanadium Isotopic Compositions of the High‐3He/4He Baffin Island Lavas

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The isotopic composition of vanadium (V) in hotspot lavas provides new insight into the source of deep mantle heterogeneities. We measured V isotopic compositions in Paleogene Baffin Island lavas, which erupted above the Iceland plume head, to constrain the mantle plume source. These lavas have V isotopic compositions that are lighter (−0.96 ± 
Jonas Kaare‐Rasmussen, Forrest Horton, Maureen Auro, Andy W. Heard, Sune G. Nielsen   +4 more
wiley   +1 more source

Garnets from the Camafuca-Camazambo kimberlite (Angola)

Anais da Academia Brasileira de Ciências, 2006
This work presents a geochemical study of a set of garnets, selected by their colors, from the Camafuca-Camazambo kimberlite, located on northeast Angola. Mantle-derived garnets were classified according to the scheme proposed by Grütter et al.
Correia Eugénio A., Laiginhas Fernando A.T.P.   +1 more
doaj  

Thermochemical Controls on the X, 410, and 660 Discontinuities in the Central Mediterranean

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract The mantle beneath the Central Mediterranean is thermally and compositionally heterogeneous, as indicated by fragmented and locally stagnant slabs in tomographic images and HIMU‐like anorogenic magmatism. Mantle discontinuities are sensitive to both temperature and composition, and thus provide a way to quantify these heterogeneities.
Luciana Bonatto, Stephen Monna, Caterina Montuori, Claudia Piromallo, Vernon Cormier   +4 more
wiley   +1 more source

Petrography and mineral chemistry of wehrlites in contact zone of gabbro intrusions and mantle peridotites of the Naein ophiolite

Journal of Economic Geology, 2014
Introduction Geological background Ophiolites have played a major role in our understanding of Earth’s processes ranging from seafloor spreading, melt evolution and magma transport in oceanic spreading centers, and hydrothermal alteration and ...
Farhad Ghaseminejad, Ghodrat Torabi
doaj  

Effect of Fluorine on the Stability of Dense Hydrous Mg Silicates With Implications for the Deep Water Cycle

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Water is believed to be transported, at least locally, into the Earth's deep mantle via hydrous minerals. Fluorine not only tends to interact with water but also influences the stability of hydrous minerals. Thus, knowledge of its stability could be important in understanding the deep‐water cycle.
Takashi Yoshino, Yunfan Miao, Satheesh T. Saji, Daijo Ikuta, Nozomi Kondo, Takayuki Ishii, Xuejing He, Tsutomu Ota, Takuya Kunihiro   +8 more
wiley   +1 more source

Dunite channels within a harzburgite layer from the Horoman peridotite complex, Japan: Possible pathway for magmas

, 2019
Two discordant dunite channels in a polished slab were collected from a harzburgite layer in the Horoman orogenic lherzolite massif, Hokkaido, Japan. The dunite channels show extreme grain-size variations, and include very large olivine megacrysts up to ...
David Green (14737870), Yoshikawa, M (15678371), Niida, K (15713231)   +2 more
core  

ELDİVAN OFİYOLİTİ'NE (ÇANKIRI) AİT HARZBURJİTİK TEKTONİTLERİN MİNERALOJİK, PETROGRAFİK VE JEOKİMYASAL ÖZELLİKLERİ

Bulletin of the Mineral Research and Exploration, 2011
Eldivan Ofiyoliti, İzmir-Ankara-Erzincan kuşağının merkezi bölümünde, Şabanözü, Eldivan ve Korgun ilçeleri arasında yer alır. Ofiyoliti oluşturan birimler alttan üste doğru, volkanik-sedimanter seri, metamorfik seri, tektonitler, kümülatlar ve levha ...
Tijen ÜNER, Üner ÇAKIR
doaj  

Studies on genesis of chromite and PGE in Naein ophiolite melange

Journal of Economic Geology, 2012
Nain ophiolite melange is located 140 Km east of Isfahan. Based on the geological studies, this area belongs to Mesozoic ophiolite of Urumieh – Dokhtar zone, west of central Iran. Country rocks are pridotite and serpentinized pridotite.
Reza Shamsipour Dehkordi, Maryan Sadeghi, Zohreh Gholami Fesharaki   +2 more
doaj   +1 more source

Mineral chemistry and geothemobarometry of mantle harzburgites in the Eastern Metamorphic Complex of Khoy ophiolite -NW Iran

Journal of Economic Geology, 2017
Introduction Khoy ophiolite at the global scale is in the middle part of the Alp-Himalaya orogenic belt and it is extended over 3900 Km2 which indicates remnant Neotethys oceanic lithosphere in the Mesozoic era (Kananian et al., 2010). In this paper, in
Morovvat Faridazad
doaj   +1 more source