Results 11 to 20 of about 971 (142)

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 importance of trace element analyses in detrital Cr‐spinel provenance studies: An example from the Upper Triassic of the Barents Shelf

Basin Research, Volume 33, Issue 2, Page 1017-1032, April 2021., 2021
Cr‐spinel from the Snadd and De Geerdalen formations are distinctly different from Cr‐spinel of the same depositional age to the east of the Uralian Orogen. Major element compositions of detrital Cr‐spinel in the Carnian Osipai Fm. north Siberia is consistent with Cr‐spinel from a large igneous province, while Snadd and De Geerdalen formation Cr‐spinel
Trond Svånå Harstad, Mai Britt Mørk E., Trond Slagstad   +2 more
wiley   +1 more source

Mineral chemistry and chromite mineralization in the Qaranaz-Alamkandi area, west Zanjan

Journal of Economic Geology, 2021
Introduction Malek Ghasemi and Karimzadeh Somarin (2005) reported that Chromite deposits in Iran occur in Paleozoic and Mesozoic ophiolite complexes in association with serpentinite and serpentinized peridotites and dunites (Ghazi et al., 2004; Shafaii ...
Parham Ahrabian Fard, Ghasem Nabatian, Mir Ali Asghar Mokhtari , Maryam Honarmand , Hossein Kouhestani   +4 more
doaj   +1 more source

CHROMITITE PROSPECTING USING LANDSAT TM AND ASTER REMOTE SENSING DATA [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Studying the ophiolite complexes using multispectral remote sensing satellite data are interesting because of high diversity of minerals and the source of podiform chromitites.
A. Beiranvand Pour, M. Hashim, M. Pournamdari   +2 more
doaj   +1 more source

Geology, geochemistry and tectonic setting of Pan-African serpentinites of Um Salim-Um Salatit area, Central Eastern Desert, Egypt

Egyptian Journal of Remote Sensing and Space Sciences, 2012
This research aims at integrating remote sensing data and field studies for lithological mapping of different rock units. Geological interpretation of Landsat ETM+ image and field studies revealed that the study area is mainly covered by ophiolitic ...
A.K.A. Salem, A.E. Khalil, T.M. Ramadan
doaj   +1 more source

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

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

Application of geological methods for prospecting of podiform chromite deposits in the Khoy ophiolite zone, Northwestern Iran

Journal of Economic Geology, 2019
Introduction Podiform chromite deposits are small magmatic chromite bodies formed in the lower section of an ophiolite complex. Podiform chromite mines have produced 57.4 percent of the world’s total chromite production.
Jaber Masoudi, Ali Imamalipour
doaj   +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