Ibrahim Milushi

Polytechnic University of Tirana

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Jingsui Yang

Chinese Academy of Geological Sciences

Fahui Xiong

Ministry of Natural Resources

Weiwei Wu

Nanjing University

Yıldırım Dilek

Miami University

Tian Qiu

Beihang University

Dongyang Lian

Nanjing University

Paul T. Robinson

China University of Geosciences

Nezir Mekshiqi

China University of Geosciences

Zhongming Zhang

Qinghai University

Wenda Zhou

Zhejiang Institute of Mechanical and Electrical Engineering

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Chinese Academy of Geological Sciences

China University of Geosciences

Ministry of Natural Resources

China University of Geosciences (Beijing)

Chinese Academy of Sciences

Nanjing University

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

Czech Academy of Sciences, Institute of Geology

University of Bologna

University of Parma

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The earliest stage of mantle-melt evolution during subduction initiation: Evidence from the Neo-Tethyan Mirdita Ophiolite, Albania

Lithos (2022)

Weiwei Wu Jingsui Yang Jianping Zheng Dongyang Lian Ibrahim Milushi

Metasomatism

Chromitite

Ultramafic rock

Forearc

10.1016/j.lithos.2022.106937

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Citations (6)

An Overview of the Albanian Ophiolite and Related Ore Minerals

Acta Geologica Sinica - English Edition (2015)

Ibrahim Milushi

Iron ore

10.1111/1755-6724.12308_39

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Citations (10)

The Main Geological Features of the Bajgore-Kacandoll Area (Vardar Tectonic Unit), Kosovo

Journal of international environmental application and science (2013)

Blerim Meholli Ibrahim Milushi

Bajgora - Kacandoll area is part of the Vardar tectonic unit. Formations of mantle sequence, mainly hartzburgite and oceanic crust sequence represented of bazalto - radiolarite are widespread in the area. The last ones are dated as of Triassic age through radiolarians. Ultramaphics contain no chromite showings and even no accessory chromite grains, but they are characterized by an excellent banding. Metamorphic sole, which is evidenced for the first time in the area, is sandwiched between basalt - radiolarian at the floor and hartzburgite at the ceiling. Flysch of Upper Jurassic and lower-upper Cretaceous overlie the ophiolite formations of the Central Vardar subzone of the Vardari tectonic unit, while Upper Cretaceous flysch overlie ophiolite formations of the western subzone of the Vardar tectonic unit. For the first time in the region are recorded andesites - dacite formations of Miocene. In the area are identified two sections with different specifications.

Flysch

Sequence (biology)

Arenite

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Mineralogical and isotopic peculiarities of high-Cr chromitites: Implications for a mantle convection genesis of the Bulqiza ophiolite

Lithos (2021)

Fahui Xiong Basem Zoheir Richard Wirth Ibrahim Milushi Tian Qiu

Melt inclusions

Isochron dating

10.1016/j.lithos.2021.106305

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Diamonds Discovered from High–Cr Podiform Chromitites of Bulqiza, Eastern Mirdita Ophiolite, Albania

Acta Geologica Sinica - English Edition (2017)

Fahui Xiong Jingsui Yang Paul T. Robinson Yıldırım Dilek Ibrahim Milushi

Abstract Various combinations of diamond, moissanite, zircon, corundum, rutile and titanitehave been recovered from the Bulqiza chromitites. More than 10 grains of diamond have been recovered, most of which are pale yellow to reddish–orange to colorless. The grains are all 100–300 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. Their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm −1 and 1333 cm −1 , mostly at 1331.51 cm −1 or 1326.96 cm −1 . This investigation extends the occurrence of diamond and moissanite to the Bulqiza chromitites in the Eastern Mirdita Ophiolite. Integration of the mineralogical, petrological and geochemical data of the Bulqiza chromitites suggests their multi–stage formation. Magnesiochromite grains and perhaps small bodies of chromitite formed at various depths in the upper mantle, and encapsulated the ultra–high pressure, highly reduced and crustal minerals. Some oceanic crustal slabs containing the magnesiochromite and their inclusion were later trapped in suprasubduction zones, where they were modified by tholeiitic and boninitic arc magmas, thus changing the magnesiochromite compositions and depositing chromitite ores in melt channels.

Chromitite

Chromite

Rutile

10.1111/1755-6724.13111

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Citations (34)

Petrology of Cr‐rich Podiform Chromitites of Bulqiza, Eastern Ophiolitic Belt, Albania

Acta Geologica Sinica - English Edition (2015)

Fahui Xiong Jingsui Yang Paul T. Robinson Yıldırım Dilek Ibrahim Milushi

10.1111/1755-6724.12308_57

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Olivine Deposit of Çabrati, Tropoja Ultramaphic Massif, Albania

Journal of international environmental application and science (2012)

Nezir Mekshiqi Ibrahim Milushi Vesel Hoxha Zenel Trezhnjeva

Tropoja ultramafic massif, which is located in the northeast of Albania, hosts one of the largest olivine deposits in the whole alpine ophiolite belt. The main sources of the olivine are dunite of the massif, which are mainly intercalations of hartzburgite. The chemicial and mineralogical composition and the physical properties of olivine body are relatively uniform. The main component of the dunite is forsterite olivine (Mg 2 SiO 4 ), which consists of 48.24 % MgO, 38.36% SiO 2 and 7.65 % Fe 2 O 3 . The average swelling ratio and LOI are 1.18% and 0.95-3.74% respectively, which fit well with requirements of iron and steel industry, as well as with standards of modern refractory requirements. The reserves of the Cabrati olivine deposit are estimated around 150 million tons. This mineral can be exported to international markets, from the port of Durresi which is about 180 km far from the deposit or Shengjini port that is about 130 km far from the deposit.

Massif

Ultramafic rock

Forsterite

Source

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The Mirdita Ophiolite (Albania); a possible record of a right-lateral motion between Pelagonian and Appulian microplates

Avni Meshi Ibrahim Milushi Hoxha Ismail

Source

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Morpho‐structural Features and Structural Classification of Chromite Pods in the Tropoje‐Has Ophiolite Massif, Albania

Acta Geologica Sinica - English Edition (2016)

Ibrahim Milushi Nezir Mekshiqi

Massif

Chromite

10.1111/1755-6724.12992

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Carbon and nitrogen isotopes and mineral inclusions in diamonds from chromitites of the Mirdita ophiolite (Albania) demonstrate recycling of oceanic crust into the mantle

American Mineralogist (2019)

Weiwei Wu Jingsui Yang Richard Wirth Jianping Zheng Dongyang Lian

Geophysical investigations and laboratory experiments provide strong evidence for subduction of ancient oceanic crust, and geological and mineralogical observations suggest that subducted oceanic crust is recycled into the upper mantle. This model is supported by some direct petrologic and mineralogical evidence, principally the recovery of super-deep diamonds from kimberlites and the presence of crustal materials in ophiolitic chromitites and peridotites, but many details are still unclear. Here we report the discovery of ophiolite-hosted diamonds in the podiform chromitites of the Skenderbeu massif of the Mirdita ophiolite in the western part of Neo-Tethys. The diamonds are characterized by exceedingly light C isotopes (δ13CPDB ~ −25‰), which we interpret as evidence for subduction of organic carbon from Earth's surface. They are also characterized by an exceptionally large range in δ15Nair (−12.9‰ to +25.5‰), accompanied by a low N aggregation state. Materials sparsely included in diamonds include amorphous material, Ni-Mn-Co alloy, nanocrystals (20 × 2 nm) of calcium silicate with an orthorhombic perovskite structure (Ca-Pv), and fluids. The fluids coexisting with the alloy and Ca-Pv provide clear evidence that the diamonds are natural rather than synthetic. We suggest that the Skenderbeu diamonds nucleated and grew from a C-saturated, NiMnCo-rich melt derived from a subducted slab of ocean crust and lithosphere in the deep mantle, at least in the diamond stability field, perhaps near the top of the mantle transition zone. The subsequent rapid upward transport in channeled networks related to slab rollback during subduction initiation may explain the formation and preservation of Skenderbeu diamonds. The discovery of diamonds from the Mirdita ophiolite not only provides new evidence of diamonds in these settings but also provides a valuable opportunity to understand deep cycling of subducted oceanic crust and mantle composition.

Adakite

Peridotite

10.2138/am-2019-6751

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Citations (32)