Results 21 to 30 of about 2,269 (206)

Integrated geophysical methods for boulder delineation to improve mining

Geophysical Prospecting, Volume 71, Issue 7, Page 1226-1246, September 2023., 2023
Abstract Near‐surface boulders can pose serious challenges to opencast mining. They often introduce complexities, delays in drilling, blasting and excavation programmes, which subsequently decrease mining efficiency, increase mining risks and costs. The location of subsurface boulders and the identification of other geological features that may impact ...
Sikelela Gomo, Moyagabo K. Rapetsoa, Musa S. D. Manzi, Emmanuel Onyebueke, Jureya Dildar, Mpofana Sihoyiya, Ndamulelo Mutshafa, Wesley Harrison, Julie E. Bourdeau, Oleg Brovko, Ian James, Gordon R. J. Cooper, Stephanie Scheiber, Raymond J. Durrheim   +13 more
wiley   +1 more source

The Central Series of the Rum Igneous Complex, NW Scotland: the rises and falls of magma in a large mafic‐ultramafic volcano

Geology Today, Volume 39, Issue 4, Page 130-143, July/August 2023., 2023
The Central Series of the Paleocene mafic to ultramafic Rum complex is the youngest of the three main cumulate series that make up the layered igneous complex of this famed Scottish island. The Central Series lies along the Long Loch Fault and provides insights into the feeder system to the Rum intrusion at an erosion level of about two kilometres ...
Brian G.J. Upton, Valentin R. Troll, C. Henry Emeleus, Colin H. Donaldson   +3 more
wiley   +1 more source

The podiform chromitites in the Dagküplü and Kavak mines, Eskisehir ophiolite (NW-Turkey) : genetic implications of mineralogical and geochemical data [PDF]

, 2009
Mantle tectonites from Eskisehir (NW-Turkey) include high-Cr chromitites with limited variation of Cr#, ranging from 65 to 82. Mg# ratios are between 54 and 72 and chromite grains contain up to 3.71 wt% Fe2O3 and 0.30 wt% TiO2.
Garuti, G., Sadiklar, M.B., Tarkian, M., Thalhammer, O.A.R., Uysal, I., Zaccarini, F.   +5 more
core   +3 more sources

Formation and Evolution of Chromitites in the Hongshishan Complex, Beishan Orogenic Collage, NW China: Constraints from Mineralogical Compositions, Re‐Os Isotopes and Platinum‐Group Element Geochemistry

Acta Geologica Sinica - English Edition, Volume 97, Issue 3, Page 727-743, June 2023., 2023
Abstract The Hongshishan chromitite deposits are situated to the north of the Beishan orogenic collage, in the southern part of the Central Asian Orogenic Belt. This study describes the mineral chemistry, Re‐Os isotopes and platinum‐group elements geochemistry of the Hongshishan chromitites for the purpose of constraining the origin, evolution and ...
Zhaolin WANG, Jiayong YAN, Xiaoming ZHENG, Hejun TANG, Lulu YUAN, Zhen DENG, Tonghui FANG   +6 more
wiley   +1 more source

Chromite in the mantle section of the Oman Ophiolite: Implications for the tectonic evolution of the Oman Ophiolite [PDF]

, 2015
Chromite in the Oman ophiolite is located in the mantle section of the ophiolite sequence and forms abundant small podiformdeposits throughout the length of the ophiolite (Rollinson, 2005).The Oman ophiolite has an exposed mantle section of ca 10 000 km2,
Adetunji, Borisova, Boudier, Ceuleneer, Hanghøj, Matveev, Michibayashi, Nicolas, Pearce, Rollinson, Rollinson, Rollinson, Rollinson, Schiano, Whattam   +14 more
core   +1 more source

Polyphase tectonic reworking of serpentinites and chlorite‐tremolite‐talc rocks (SW Spain) from the subduction forearc to intracontinental emplacement

Journal of Metamorphic Geology, Volume 41, Issue 4, Page 491-523, May 2023., 2023
Abstract The petrostructural and geochronological study of a poorly known ultramafic unit from SW Spain (Badajoz–Córdoba belt) combined with previous structural data permits disclosure of a history of metasomatism, tectono‐metamorphism, reworking and isotopic resetting related to a poly‐orogenic evolution in different geodynamic scenarios.
Benito Ábalos, Pablo Puelles, José Ignacio Gil Ibarguchi   +2 more
wiley   +1 more source

The origin of Madagascar chromitites

Ore Geology Reviews, 2014
Abstract Precambrian rocks of Madagascar host numerous chromitite occurrences, ranging from centimeter-thick lenses and seams to orebodies containing millions of tons. Production of chromite concentrates and lumpy, coming from Bemanevika mine that was estimated to have a remaining life of 15 years ( Rahaga, 2009 ), establishes Madagascar as the world
G. Grieco, A. Merlini, M. Pedrotti, M. Moroni, R. Randrianja   +4 more
openaire   +1 more source

Petrogeochemical characteristics of chrome-bearing ultramafites in the Kurtushibinsky ophiolite belt (Western Sayan)

Литосфера, 2019
Research subject. The metamorphic ultramafites of the Kalninsky and Ergaksky massifs located in the northeastern part of Western Sayan (Russia) constitute the Kurtushibinsky ophiolite belt.
A. I. Chernyshov, A. N. Yurichev, A. V. Kicheeva   +2 more
doaj   +1 more source

MINERALOGY OF CHROMITITES OF MOUNT POKLONNAYA OF THE KARABASH MASSIF, SOUTH URALS [PDF]

Минералогия, 2022
Mineral composition of chromitites and host serpentinites from a quarry at Mt. Poklonnaya of the Karabash serpentinite massif is studied using optical and electron microscopy.
V.I. Popova, E.V. Belogub, M.A. Rassomakhin, V.A. Popov, P.V. Khvorov   +4 more
doaj   +1 more source

Mineralogical and geochemical features of chromitites of the Apshak area (South Kraka ultramafic massif, South Urals) [PDF]

Минералогия
Mineral composition of chromitites of the Apshak area in the northwestern part of the South Kraka massif (the largest representative of the Kraka group ophiolites), which is confined to the northern closure of the Zilair Synclinorium on the western slope
T.D. Shabutdinov, D.E. Saveliev, R.A. Gataullin   +2 more
doaj   +1 more source