, Balochistan Region. Ophiolites are exposed in different localities in Pakistan, from the Karakoram–Himalaya thrust to Lasbela district at the south (e.g., Zaigahm 1991). The dunite/harzburgite component may represent the highest parts of a depleted upper mantle shell, about 16 km thick, from which a basaltic partial melt (approx. Abstract: The ophiolite is exposed near Nal village (Khuzdar district) of Balochistan, Pakistan which represents the northern part of Bela ophiolite. These ophiolites were obducted onto the Indian continental margin around the Late Cretaceous, prior to the main collision between the Indian and Eurasian plates. (2004) Tethyan ophiolites along the western margin of the Indian plate, Pakistan. The ophiolite obduction on the West Indian continental margin was preceded by alkaline (WPB) type volcanism which is represented by the Porali basalts, the Bibai lavas and the Deccan basalts. [10] F. Allemann, “Time of emplacement of the Zhob Valley ophiolites and Bela ophiolites, Baluchistan (preliminary report)”, Geodynamics of Pakistan. The Bela Ophiolite (BO) is the largest (~450km) and most complete ophiolite in Pakistan, striking NS. The Zhob ophiolite is exposed in northwestern Pakistan and is part of the suture zone marked by the Bela, Muslim Bagh and Waziristan ophiolite complexes (Şengor, 1987; Fig. The Lasbela-Khuzdar region contains the largest ophiolitic complex in Pakistan. Ahmed, Z. An integrated geophysical and the geological investigations for the Bela Ophiolites of Southern Axial-belt of Baloachistan, have been carried out to evaluate the tectonic phases and the mineral potentials associated with the ophiolites. which laterall" emplace o! [10] A. Gansser, “Reconnaissance visit to the ophiolites in Baluchistan and the Himalaya”, Geodynamics of Pakistan… Bela ophiolite, Khuzdar District, Balochistan Region, Pakistan iRegional Level TypesBela ophiolite- not defined -Khuzdar DistrictDistrictBalochistan RegionRegionPakistanCountry. The Nal ophiolites are scattered outcrops and erected in an elongated N-S trend which is relatively thin (in E-W direction) as compared to Bela ophiolites. The lava flows belong to a spilite-keratophyre-basaltic andesite suite of tholeiites enriched in Fe, TiO2 and other trace elements. The ophiolite suite is probably generated by axial plate accretion at oceanic ridges, and by diffuse slow spreading in marginal basins behind and within island arc complexes. [9] M.I. Geological Survey of Pakistan… Keywords: Ophiolite; Pakistan; Muslim Bagh 1. An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea level and often emplaced onto continental crustal rocks. se ime!ts# mafic e$tr%si&e a! OPHIOLITE The characteristic assemblage of rocks which form at sprea i!g ri ges is calle a! This document give a brief acount about ophiolites of Pakistan. A comparison of the stratigraphic and structural features of the Bela Ophiolites with modern oceanic environments reveals that these ophiolites probably originated in a large oceanic fracture zone (leaky transform). The ophiolite geology comprises various lithological units including basalt–chert and hyaloclastite mudstone units. 190-206, 2014. This document give a brief acount about ophiolites of Pakistan. Genesis of Economic Minerals from the Zhob Valley Ophiolites, Balochistan, Pakistan (2017-19). The Bela Ophiolites consist of a 3–5-km-thick sequence of basaltic pillow lava, inter-flow sedimentary rocks (chert, argillite, limestone) and diabase-gabbro sills. %ltramafic rocks' These se(%e!ces are commo!l" re&elale i! 1a). ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Tectonic setting of the Bela Ophiolites, southern Pakistan. However, due to their relative enrichment in certain elements (e.g., Fe, Ti, Hf, Th and Ta, etc. 1998 ). The Muslim Bagh ophiolitic complex Balochistan, Pakistan is comprised of an upper and lower nappe and represents one of a number of ophiolites in this region which mark the boundary between the Indian and Eurasian plates. Muslim Bagh Ophiolite Oceanic Plagiogranites 1 1 Petrogenesis of plagiogranites in the Muslim Bagh Ophiolite, 2 Pakistan: implications for the generation of Archean continental 3 crust 4 5 Category: original article 6 7 Daniel Coxa,b*, Andrew C. Kerrb, Alan R. Hastiea, M. Ishaq Kakarc 8 9 a School of Geography, Earth and Environmental Sciences, University of Birmingham, This ancestral fracture zone was destroyed when transform movement gave way to oblique convergence, culminating in the ophiolite obduction in Paleocene-Early Eocene time. Bela ophiolite (BO), the largest ophiolite in Pakistan, is important to our understanding of the western margin of the Indian plate, particularly the collisional history of Indian and Eurasian plates. The lava flows, although similar to the E-type MORB, differ in details such as La/Ta ratio ranges (9.62–18.04 for the Bela lavas versus 10–15 for the MORB). The Zhob ophiolite is divided into Ali Khanzai, Omzha, and Naweoba blocks. The Muslim Bagh Ophiolite, in Balochistan, Pakistan is a relatively intact ophiolite consisting of thick mantle peridotites, with a mantle-crust transition zone which passes into layered ultramafic–mafic cumulates and a less well-developed sheeted dyke complex with no … The BO is linked with Alpine-Himalayan Mesozoic Ophiolite Belt, which stretches from European Alps to Asia. These ophiolites sit on subduction zone accretionary complexes (subduction complexes) and have no association with a passive continental margin. co!ti!e!tal lithosphere. Bela ophiolite, Khuzdar District. The ophiolite is oriented north-south and exposed between Karachi and Khuzdar. In Pakistan, the Zhob Valley ophiolites consist of the Muslim Bagh, Khanozai and Zhob ophiolites. known occurrence of ophiolites in Pakistan and is documented as Zhob valley ophiolite belt. areas characteri)e b" accretio!ar" tecto!ics# s%ch as the wester! Introduction studies of ophiolites have subsequently challenged this view. Zaigham, Mayyer Alam. ), they may represent more fractionated late melts. Bela Ophiolite: The Bela Ophiolite is the largest outcrop of oceanic lithospheres in Pakistan. Ophiolite in north-western Pakistan (Kakar et al., 2012). Oral presentation in the Session, T27.04- " Ophiolites and suture zones of the Tethysides", (code: A32IGC43LF), 32nd International Geological Congress, Florence, Italy. The Bela Ophiolite is the largest ophiolite body in western Pakistan, along the western boundary of the Indian plate. Here, we present new whole-rock data from plagiogranitic dyke-like bodies and lenses from the lower and middle sections of the sheeted dyke complex of the Cretaceous Muslim Bagh Ophiolite, northwestern Pakistan. … The age of the ophiolites, as indicated by pelagic microfauna, is Aptian-early Maestrichtian. 202, Pp. The basalt–chert and hyaloclastite mudstone units consist of thick lava and pelagic sediments. Muslim Bagh Ophiolite Oceanic Plagiogranites 4 petrogenesis. This page is currently not sponsored. by jawad299 in Types > Research, ophiolites, and bela ophiolites Good to Great: Why Some Companies Make the Leap...And Others Don't, The Life-Changing Magic of Tidying Up: The Japanese Art of Decluttering and Organizing, MONEY Master the Game: 7 Simple Steps to Financial Freedom, Getting Things Done: The Art of Stress-free Productivity, Shoe Dog: A Memoir by the Creator of Nike, Battlefield of the Mind: Winning the Battle in Your Mind, The Positive Shift: Mastering Mindset to Improve Happiness, Health, and Longevity, I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer, 100% found this document useful (3 votes), 100% found this document useful, Mark this document as useful, 0% found this document not useful, Mark this document as not useful. However, it is located in a remote location and has not been extensively studied. presentation on ophiolites by hafiz shahid hussain yousafzai Ahmed, Z. Mapped the Bela Ophiolite and divided it … Northwest of Karachi, the Bela ophiolite zone is the southernmost exposure in a string of three major ophiolitic occurrences in the Axial fold-thrust belt, which extends generally south and southwest from northern Pakistan to the Arabian Sea. The ophiolite is about 10 to 60 Km wide and 300 Km long. OPHIOLITES OF PAKISTAN. Bela Ophiolite could be tectonically subdivided into two units: the lower unit and the upper unit. For example, no detailed geological map for this area exists. Copyright © 2021 Elsevier B.V. or its licensors or contributors. Ophiolites of Pakistan were developed on Neotethys ocean floor prior to the India-Eurasia collision, during Late Cretaceous times. Petrology, Geochemistry and Tectonic Setting of Zhob Ophiolites, Northwestern Pakistan (2018-20 MS/M.Phil Geology and Petrology of the Rocks of Omzha Block, Zhob Ophiolites, northern Balochistan, Pakistan (2018-20). By continuing you agree to the use of cookies. We investigate the composition of these plagiogranitic lenses and dykes in the sheeted dyke complex to determine their . We then discuss the implications of these results for the generation of Archean NW India and Pakistan.Although evidence for the existence of any active IOIA system during the Late Cretaceous and Paleocene in Tibet is lacking, IOIA rocks of this age are reported from the Muslim Bagh and Bela ophiolites in Pakistan and the Spongtang Massif in NW India. It is among the least studied ophiolites in this region because of its remote location. (2001) Geological features of the ophiolites along the Yanbu ophiolites sequence. This is based on lithotectonic features such as the common occurrence of debris of foliated serpentinite and serpentinite-carbonate-breccia-bearing rocks in the ophiolite sequence and on geodynamic considerations. 42. We use cookies to help provide and enhance our service and tailor content and ads. The Bela Ophiolites consist of a 3–5-km-thick sequence of basaltic pillow lava, inter-flow sedimentary rocks (chert, argillite, limestone) and diabase-gabbro sills. Debris of serpentinite (up to kilometer-sized blocks), serpentinite-carbonate breccia, and less commonly of basalt, gabbro, peridotite, pelagic limestone and their metamorphic equivalents occur throughout the ophiolite sequence and may form extensive horizons. The diabase-gabbro sills are similar to the associated lava flows. , Pakistan.
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