Results 31 to 40 of about 690,278 (261)

A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]

, 2011
The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Amaral, Baldo, Castroviejo, Castroviejo, Cawood, Chew, Colombo C.G. Tassinari, Dalmayrac, Dalziel, Eurico Pereira, Fuck, Irvine, Jorge Acosta, Jose F. Rodrigues, Le Maitre, Ludwig, Megard, Palme, Pearce, Pedrosa-Soares, Ramos, Ramos, Ramos, Ricardo Castroviejo, Sato, Steiger   +25 more
core   +3 more sources

Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

Plant and Soil, 2018
Background and aimsUltramafic soils constitute an extreme environment for plants because of specific physico-chemical properties and the presence of Ni, Cr, and Co. We hypothesized that type of ultramafic parent rock depending on their origin affects the
A. Pędziwiatr, J. Kierczak, Jarosław Waroszewski, G. Ratié, C. Quantin, E. Ponzevera   +5 more
semanticscholar   +1 more source

Abiotic Methane Generation via CO2 Hydrogenation With Natural Chromitite Under Hydrothermal Conditions

Geochemistry, Geophysics, Geosystems, 2021
In modern continental serpentinization systems and ultramafic rock‐hosted sub‐seafloor hydrothermal systems, it is believed that chromitite plays an important role in abiotic hydrocarbon generation.
Hisahiro Ueda, Yohei Matsui, Yusuke Sawaki   +2 more
doaj   +1 more source

Petrogenetic Study on Ultramafic Rocks from Waturapa and Surrounding Areas, South Konawe Regency, Southeast Sulawesi Province

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2023
The petrogenesis study of ultramafic igneous rocks in the South Konawe Region has been carried out by several previous researchers, however, petrogenesis of ultramafic igneous rocks in the Waturapa Region has never been carried out in detail.
Hasria, Masri, Muhammad Arba Azzaman, Muhamad Jerniawan   +3 more
doaj   +1 more source

Origin of Fe‐Ca‐Metasomatism in Exhumed Mantle Rocks at the MARK Area (23°N, ODP Leg 153) and Implications on the Formation of Ultramafic‐Hosted Seafloor Massive Sulfide Deposits

Geochemistry, Geophysics, Geosystems, 2023
At Mid‐Ocean Ridges, hot, reduced, acidic, and metal‐rich fluids are responsible for the formation of ultramafic‐hosted seafloor massive sulfide deposits (UM‐SMSs), where mantle exhumation efficiently operates.
R. Coltat, M. Andreani, C. G. C. Patten, M. Godard, B. Debret, J. Escartin   +5 more
doaj   +1 more source

Precambrian basement rocks of Wadi-Khuda-Shut area, South Eastern Desert of Egypt: Geology and remote sensing analysis

Egyptian Journal of Remote Sensing and Space Sciences, 2021
Wadi Khuda-Wadi Shut area in the South Eastern Desert (SED) of Egypt is mainly made up of gneisses, ophiolitic serpentinites and intermediate schistose metavolcanics.
Mahmoud M. Shokry, Mohamed F. Sadek, Aly F. Osman, Baher A. El Kalioubi   +3 more
doaj   +1 more source

Influence of Petrogenesis on the Engineering Properties of Ultramafic Aggregates and on Their Suitability in Concrete

Applied Sciences, 2022
This study focuses on the use of petrology as a useful tool in construction applications (i.e., concrete). More specifically, this study investigates how the petrogenetic characteristics of ultramafic rocks derived from ophiolite complexes (Veria–Naousa,
Petros Petrounias, Panagiota P. Giannakopoulou, Aikaterini Rogkala, Alkiviadis Sideridis, Petros Koutsovitis, Paraskevi Lampropoulou, Nikolaos Koukouzas, Panagiotis Pomonis, Konstantin Hatzipanagiotou   +8 more
doaj   +1 more source

The Cogne magnetite deposit (Western Alps, Italy): a Jurassic seafloor ultramafic-hosted hydrothermal system? [PDF]

, 2017
The Cogne magnetite deposit (Western Alps, Italy) is the largest in a series of apatite and sulphide-free magnetite orebodies that are hosted in serpentinites belonging to western Alpine ophiolitic units.
Toffolo, Luca
core   +1 more source

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

Petrogenesis and tectonic significance of mafic–ultramafic rocks from Southwest Yunnan, China

Comptes Rendus. Géoscience, 2020
This study focuses on the mafic–ultramafic lavas of the Early Carboniferous outcrop in Mangxin, southwestern Yunnan, China. Picrites with 26–32 wt% MgO and a quenched texture are the most significant components of this rock association.
Shi, Qing, Fang, Nianqiao
doaj   +1 more source