Results 11 to 20 of about 194 (169)

Genetic Link between Podiform Chromitites in the Mantle and Stratiform Chromitites in the Crust: A Hypothesis [PDF]

Minerals, 2021
No genetic link between the two main types of chromitite, stratiform and podiform chromitites, has ever been discussed. These two types of chromitite have very different geological contexts; the stratiform one is a member of layered intrusions, representing fossil magma chambers, in the crust, and the podiform one forms pod-like bodies, representing ...
openaire   +1 more source

Chromite Composition and Platinum-Group Element Distribution in the Proterozoic Chimalpahad Anorthosite Complex, South India: Implications for Magmatic Processes and Discrimination of Tectonic Setting

Lithosphere, 2022
The Proterozoic Chimalpahad Anorthosite Complex (CAC) is a deformed and dismembered complex in South India comprising of anorthosite-leucogabbro-gabbro-ultramafic rocks.
Tushar Meshram, Shraddha Nannaware, Satya Narayana Mahapatro, M. L. Dora, Srinivasa Baswani, Kirtikumar Randive   +5 more
doaj   +1 more source

Diamond and Other Exotic Mineral-Bearing Ophiolites on the Globe: A Key to Understand the Discovery of New Minerals and Formation of Ophiolitic Podiform Chromitite

Crystals, 2021
Ophiolite-hosted diamond from peridotites and podiform chromitites significantly differs from those of kimberlitic diamond and ultra-high pressure (UHP) metamorphic diamond in terms of occurrence, mineral inclusion, as well as carbon and nitrogen ...
Fei Liu, Dongyang Lian, Weiwei Wu, Jingsui Yang   +3 more
doaj   +1 more source

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

PLATINUM METAL MINERALIZATION OF THE SOUTH URALS MAGMATIC COMPLEXES: GEOLOGICAL AND GEODYNAMIC CHARACTERISTICS OF FORMATIONS, PROBLEMS OF THEIR GENESIS, AND PROSPECTS

Геодинамика и тектонофизика, 2021
In the South Urals, we have identified and investigated two platinum-bearing formations – ophiolite chromitebearing complexes, and the Khudolaz differentiated mafic-ultramafic complex with sulfide Cu-Ni mineralization.
I. R. Rakhimov, D. E. Saveliev, A. V. Vishnevskiy   +2 more
doaj   +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

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

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

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