Results 51 to 60 of about 370 (183)

Raising the Roof of the World: Intra‐Crustal Asian Mantle Supports the Himalayan‐Tibetan Orogen

Tectonics, Volume 44, Issue 9, September 2025.
Abstract The Himalayan‐Tibetan orogen formed via the ongoing collision of India and Asia. Its colossal elevations stem from buoyant crustal roots that doubled in thickness during continental collision, widely believed to result from Indian crust under‐thrusting its Asian counterpart and Asian crustal thickening. However, a single crustal layer of up to
P. Sternai, S. Pilia, S. Ghelichkhan, P. Bouilhol, A. Menant, D. R. Davies, L. Ostorero, B. Vaes, R. Esposito, E. Garzanti, S. Cloetingh, T. Gerya   +11 more
wiley   +1 more source

Evidence for late impact‐induced metasomatism on the brachinite parent body recorded by a phosphate assemblage in NWA 7828

Meteoritics &Planetary Science, Volume 60, Issue 9, Page 2099-2113, September 2025.
Abstract Brachinites are a group of ultramafic achondritic meteorites thought to sample a planetesimal from the early inner solar system. They yield predominately ancient crystallization ages within 4 Ma of CAI formation, and while the formation mechanism for these samples is debated, they are widely thought to be partial melt residues from a ...
L. F. White, B. G. Rider‐Stokes, M. Anand, R. Tartèse, J. R. Darling, G. Degli Alessendrini, R. Greenwood, K. T. Tait   +7 more
wiley   +1 more source

Mineralogical and Gemological Characteristics and Color Genesis of Zibai Jade

Crystals
Zibai Jade is a recently identified hydrogrossular-dominant jade originating from Shaanxi Province, China. It constitutes a polymineralic aggregate composed predominantly of hydrogrossular, with minor proportions of vesuvianite, diopside, chlorite ...
Linhui Song, Mingyue He, Ziyun Zhang, Ling Yang   +3 more
doaj   +1 more source

A hydrothermal karst-hosted U-P deposit related to Pangea break-up: Itataia deposit, Borborema Province, Northeastern Brazil - a review

Journal of the Geological Survey of Brazil, 2018
The Itataia U-P deposit holds the second largest uranium reserve in Brazil. All of the uranium is contained within the microcrystalline structure of fluorapatite, which is the ore mineral of the collophanite bodies.
José Adilson D. Cavalcanti, Maria Dulcinea M.R. Bessa, Roberto Ventura Santos, Cesar U.V. Veríssimo, Clovis Vaz Parente   +4 more
doaj   +1 more source

A Gravity Study of the Crustal Structure Beneath the Young Amagmatic Rukwa‐Tanganyika Rift Zone

Tectonics, Volume 44, Issue 8, August 2025.
Abstract The Rukwa‐Tanganyika Rift Zone (RTRZ), experiencing multiphase rifting, forms the nonvolcanic southern part of the Western Branch of the East African Rift. We investigate the crustal structure beneath the RTRZ to understand how strain migrates beneath multiphase rifts.
Emmanuel A. Njinju, Estella A. Atekwana
wiley   +1 more source

ORIGIN OF CHOGHART IRON OXIDE DEPOSIT, BAFQ MINING DISTRICT, CENTRAL IRAN: NEW ISOTOPIC AND GEOCHEMICAL EVIDENCE [PDF]

Journal of Sciences, Islamic Republic of Iran, 2003
The origin of the Proterozoic Choghart iron oxide deposit in the Bafq mining district of Central Iran has been the subject of a long-standing dispute.
doaj  

Assessing the Validity of Negative High Field Strength-Element Anomalies as a Proxy for Archaean Subduction: Evidence from the Ben Strome Complex, NW Scotland

Geosciences, 2018
The relative depletion of high field strength elements (HFSE), such as Nb, Ta and Ti, on normalised trace-element plots is a geochemical proxy routinely used to fingerprint magmatic processes linked to Phanerozoic subduction.
George L. Guice, Iain McDonald, Hannah S. R. Hughes, Denis M. Schlatter, Kathryn M. Goodenough, John M. MacDonald, John W. Faithfull   +6 more
doaj   +1 more source

Convective Instability in Intraplate Oceanic Mantle Caused by Amphibolite-Derived Garnet-Pyroxenites—A Xenolith Perspective (Hyblean Plateau, Sicily)

Geosciences, 2020
Geochemical characteristics of middle ocean ridge basalts (MORBs) testify partial melting of spinel-peridotite mixed with a few amounts of garnet-pyroxenite.
Vittorio Scribano, Serafina Carbone
doaj   +1 more source

An atlas of apatite and merrillite in martian meteorites: REE Geochemistry and a new tool for shergottite classification

Meteoritics &Planetary Science, Volume 60, Issue 8, Page 1894-1920, August 2025.
Abstract The phosphates, apatite and merrillite, are accessory phases in all martian meteorites. Although apatite is commonly used to assess volatile content and speciation in martian meteorites, merrillite is at least twice as abundant in most samples, but poorly understood. Given that shergottites are divided into enriched, intermediate, and depleted
Tahnee Burke, Andrew G. Tomkins, Zsanett Pinter, Andrew D. Langendam, Laura A. Miller   +4 more
wiley   +1 more source

Characteristics of chlorites from the Haopinggou Ag–Au polymetallic deposit in the Xiong’ershan ore concentration area and its exploration implications

Dizhi lixue xuebao
Objective  The Haopinggou Ag-Au polymetallic deposit is a typical intermediate-sulfidation epithermal deposit in the Xiong'ershan ore concentration area. Ag-Pb-Zn mineralization mainly occurs in steeply dipping veins and breccia matrix.
LIU Songyan, ZHANG Da, YANG Mingjian, ZHANG Xinming, WEI Guodong, NIE Shengqiang, WANG Xuan, FENG Yanping, LI Wenjie, CHEN Guilan   +9 more
doaj   +1 more source