Results 1 to 10 of about 191 (175)

Chromitite layers indicate the existence of large, long-lived, and entirely molten magma chambers [PDF]

Scientific Reports, 2022
The classical paradigm of the ‘big magma tank’ chambers in which the melt differentiates, is replenished, and occasionally feeds the overlying volcanos has recently been challenged on various grounds.
Rais Latypov, Sofya Chistyakova, Stephen J. Barnes, Belinda Godel, Gary W. Delaney, Paul W. Cleary, Viktor J. Radermacher, Ian Campbell, Kudakwashe Jakata   +8 more
doaj   +2 more sources

Investigation of Petrological Characteristics of The Upper Mantle in Hadji-Abad Ophiolitic Complex (South of Iran): Based on Mineral Chemistry [PDF]

Journal of Sciences, Islamic Republic of Iran, 2021
The mantle peridotites of the Hadji-Abad ultramafic complex in Hormozgan province, show some petrological evolutions of the upper mantle of southern Iran. The complex includes harzburgite, lherzolite, dunite and chromitite.
Mojtaba SoltaniNezhad, Hamid Ahmadipour, Abbas Moradian, Azam Zahedi, Kazuo Nakashima   +4 more
doaj   +1 more source

the origin of Abgarm ultramafic complex (South of Kerman province) [PDF]

پترولوژی, 2020
Abgarm ultramafic complex in the south of Kerman province is a part of Esfandagheh- Haji Abad ophiolite which is located in the northern edge of Zagros thrust. The complex contains harzburgites, lherzolites, dunites, and chromitites.
Raziyeh Alipour, Hesam Moeinzadeh, Hamid Ahmadipour   +2 more
doaj   +1 more source

Post-magmatic processes recorded in bimodal chromitites of the East Chalkidiki meta-ultramafic bodies, Gomati and Nea Roda, Northern Greece

Frontiers in Earth Science, 2022
The meta-ultramafic bodies of Gomati and Nea Roda are situated in the Serbomacedonian Massif. They demonstrate bimodal character in terms of chromitite chemistry with both Cr- and Al-rich chromitites outcropping in proximity, with no obvious tectonic ...
Alkiviadis Sideridis, Basilios Tsikouras, Pavlos Tsitsanis, Petros Koutsovitis, Federica Zaccarini, Christoph Hauzenberger, Harilaos Tsikos, Konstantin Hatzipanagiotou   +7 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

The Tornio layered intrusion - a recently discovered intrusion with chromitite horizons in Northern Finland [PDF]

Bulletin of the Geological Society of Finland, 1982
In the 1960's chromite boulders were found in the area between the Kemi chromium mine and the town of Tornio. In 1979 after many years of prospecting a layered intrusion with thin chromitite layers was found northeast of the town of Tornio.
K. Söderholm, O. Inkinen
doaj   +1 more source

Multistage origin of dunite in the Purang ophiolite, southern Tibet, documented by composition, exsolution and Li isotope characteristics of constituent minerals [PDF]

European Journal of Mineralogy, 2020
The Purang ophiolite, which crops out over an area of about 650 km2 in the western Yarlung–Zangbo suture zone, consists chiefly of mantle peridotite, pyroxenite and gabbro.
F. Xiong, F. Xiong, J. Yang, H.-P. Schertl, H.-P. Schertl, Z. Liu, X. Xu   +6 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

Exotic accessory minerals in layered chromities of the Campo Formoso complex (Brazil)

Geologica Acta, 2006
The Campo Formoso stratiform intrusive complex, in Bahia State, Brazil, considered to be of Paleoproterozoic age, consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide.
F. ZACCARINI, G. GARUTI, R. MARTIN
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