Munazzam Ali Mahar

Munazzam Ali Mahar
University of Texas at El Paso | UTEP · Department of Geological Sciences

PhD (University of Texas at El Paso)

About

30
Publications
11,277
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
74
Citations
Introduction
Munazzam Ali Mahar currently works at the Department of Geological Sciences, University of Texas at El Paso. Munazzam Ali does research in Petrology, Isotope Geochemistry and Geochronology to understand the tectonothermal and magmatic evolution of magmatic belts.

Publications

Publications (30)
Article
Origin of post collision plutonism is critical to understand the tectonothermal evolution of the over thickened continental crust in collision zones. This has proven difficult to reconcile with the conventional whole rock geochemical and field based studies alone. We report in-situ study of zircon U–Pb, Hf and O isotopes from five samples of the Ba...
Article
The timing and origin of partial melting in collision belts is crucial to understand the thermotectonic evolution and the relationship between HT metamorphism and magmatism in over-thickened crust. In the present study, we used the in-situ isotopic (Hf, O and U–Pb) record of zircons to investigate the timing and origin of migmatitic gneisses expose...
Article
We present the whole-rock geochemistry, LA-ICP-MS zircon-apatite U–Pb ages and zircon Hf isotope composition of the granodioritic plutons at the southwestern boundary of Chihuahua with the states of Sinaloa and Sonora. These granodiorites are exposed in the north and south of the Rio El Fuerte in southwest Chihuahua and northern Sinaloa. The magmat...
Article
New studies of forearc tonalite-trond¬hjemite plutons in southern Alaska provide further support for an Early Cretaceous intra-oceanic ridge subduction along the northern Cordilleran margin. The geological setting together with the timing and geochem¬istry of the plutons strongly suggest the ori¬gin of these plutons can be related to a ridge subduc...
Article
We present whole-rock geochemistry, LA-ICP-MS zircon U-Pb ages and Hf isotopic compositions of subsurface lithologies in the northwestern corner of Mesa Central, Mexico. Zircon U-Pb ages identify five magmatic events: (1) ca. 162 Ma Nazas volcano-sedimentary province; (2) 88-61 Ma early stage Laramide age magmatism; (3) 57-48 Ma late stage Laramide...
Article
Full-text available
Kohistan, an intra-oceanic arc, formed due to the India-Asia collision-related tectonics. The arc is comprised of mafic-ultramafic and crustal lithologies. Chilas Complex, one of the major mafic-ultramafic body that lies at the base of the Kohistan arc, is dominantly composed of massive gabbronorites with local ultramafic-mafic intrusive bodies. Th...
Article
Full-text available
Apatite is significant phosphate-bearing accessory mineral that is omnipresent in most granitic rocks. In this study, we present geochemical characteristics of magmatic apatites from the Luming and Lower Yangtze granitic belts of NE and eastern China to explore their potential in petrogenesis, mineralization and tectonic evolution of granites. The...
Article
Full-text available
Mansehra Granite (MG) is massive and sheared which contains light-gray to jet-black schistosed and light-gray micaceous quartzite restites. The later possess relatively higher quartz as compared with mica contents whereas the former has predominant quartz and feldspar. Enclosure of apatite and zircon in micas and absence of sillimanite in schistose...
Conference Paper
Full-text available
Timing and origin of basement underneath northern Libya is not well-understood and inferred as the northern boundary of Saharan Metacraton. In this work, we present the unprecedented LA-ICP-MS zircon U-geochronology and zircon Hf isotope composition from the igno-metamorphic basement underneath the Sirte basin. The analyzed igneous rocks are from t...
Article
Precise timing and constraints for magma source(s) are critical to understand the post-subduction tectonomagmatic evolution of the world's largest Cenozoic Silicic Large Igneous Province in western Mexico. We provide in-situ zircon U-Pb ages and Hf isotope compositions of rhyolitic ignimbrites exposed in the Palmarejo and Guazapares at the northwes...
Chapter
Full-text available
The Red Sea Coast in the southernmost part of Egypt is characterized with an early geological history of erosion and sediment transportation through a remarkably long and wide paleo-channel. Several alluvial deposits rich in economic heavy minerals have been identified along the coastal strip lying between Ras Banas and the Sudaniese border. Accumu...
Conference Paper
Full-text available
Precise timing and characterization of magma sources are critical to better understand the tectonomagmatic and geodynamicevolution of southwestern margin of Laurentia. This work provides LA–MC–ICP–MS U–Pb geochronology and LA–MC–ICP–MS time-constrained zircon Hf isotope composition on five samples from two stages of the Red Bluff Granitic Suite (RB...
Conference Paper
The Sierra Madre Occidental of Mexico is the largest SLIP (silicic large igneous province) in the world, and contains large amounts of mineral resources. The timing and origin of epithermal precious metal mineralization in one region in western Chihuahua is the purpose of the present report. High resolution airborne magnetometry combined with remot...
Conference Paper
The northwestern part of Mesa Central is a region of intense mineral exploration; however, deposits are buried by Oligocene-Quaternary basalts and Quaternary sediments. Samples of the subsurface units can only be acquired via diamond core drilling. This work aims to improve the currently utilized stratigraphic column at the deposit and allow for co...
Article
Full-text available
The southeast shoulder of the Rio Grande Rift is located in southeastern New Mexico and west Texas in US and northern Chihuahua in Mexico. Noted mineral resources in the region are enriched in rare earth elements increasing the interest of research. These resources are related to tertiary volcanism. The magmas of this volcanism have similar composi...
Conference Paper
Full-text available
In the present work, we provided the zircon U–Pb ages and Hf isotope composition of the post-Laramidic ignimbrites exposed in the Palmarejo and Guazapares Ag-Au epithermal mineralization districts in western Chihuahua, Mexico. Three ignimbrite samples from Guerra Al Tirano and one sample from Guadalupe Norte dome in the Palmarejo district yielded w...
Conference Paper
Full-text available
Zircon U–Pb ages and Hf-O isotopic composition provided the important constraints for the timing and origin of caldera related alkaline magmatism at the western and eastern part of the southern Rio Grande Rift (RGR) that is, Sierra Candelaria in northern Chihuahua and Quitman Mountain in west Texas, respectively. Zircons from syenite samples collec...
Conference Paper
Full-text available
We present the zircon-apatite U–Pb ages and zircon Hf isotope composition of the granite batholith exposed at the western boundary of Chihuahua. Granidiorite samples were analyzed from both, north and south of the Rio El Fuerte and Sinforosa Lineament. Based on previous studies, the WWN-EES trending Sinforosa Lineament is proposed as the manifestat...
Article
Here we present the LA-ICP-MS U–Pb ages and Hf isotopic record of detrital zircons from the active alluvial fans at the west coast of the Red Sea. The Ras Manazal alluvial fan (primarily composed of zircon, magnetite with some rutile, ilmenite and monazite) yielded a relatively restricted age population ranges from 765 to 666 Ma. These ages and pre...
Article
In this study geochemistry of Nagar Parkar intrusives has been discussed in detail with particular reference to uranium. The uranium content of southern and eastern plutons is relatively higher as compared to the northern part of the complex. It has been a general tendency that the uranium concentration in pink granites is more pronounced. Negative...
Article
Full-text available
U and Th data revealed that the granites of both the suits may be considered as a moderate source for the small scale uranium deposit. Negative disequilibrium in the Nagar Parkar granites and the higher U-content in the wide and extensive zones of kaolin in the low lying inter-plutonic areas suggest mobility of uranium from the system. Higher U and...

Questions

Questions (15)
Question
Does anyone has the location map and name of all the drill-holes ( drilled in 80s) in Sirte Basin?
I am working on tectnomagmatic evolution of northern extremity of Sahara Metacraton.
Location maps, cross sections basement maps would be very helpful.
Sincerest Regards,
Munazzam Ali
Question
What we know about the Sahara metacraton (north central Africa) so far? How it relates with the Arabian Nubian Shield and other surrounding lithotectonic units in time and space? I am looking for updated information, discussion, prevailing ideas about tectonomagmatic evolution of Sahara Meta craton.
Question
The regions mentioned above record A-type magmatism with similar radiogenic isotopic composition. But, overall they are interpreted to be emplaced in the regional Grenvillean Convergence. If it was a convergence, then how the mantle-related magma origin can be justified. An extensional setting within the convergence zone? Was there a slab break off? collapse, or roll back of descending slab at 1.1 Ga. Otherwise, how one can justify the alkaline A type magmatism, lamprophyres and syenites within the overthickened crust which show limited zircon inheritance of older crust and Hf isotopic composition is radiogenic?
Question
A REE pattern as observed in an intra oceanic tonalite (plagiogranite) such that flatter and low HREE, similar to the primitive mantle with no Eu anomaly. Under what conditions such REE pattern can be achieved? The Hf-O isotope composition of these TTG rocks strongly suggests depleted mantle. Can such a REE pattern be achieved by shallow partial melting of amphibolite underplate?
Suggestions?
Question
Can anyone provide the list of geo(thermo)chronology labs in Germany?
Best,
Ali
Question
Semail ophiolite in Oman obducted on southeastern margin of Arabian plate is more or less at the boundary between the Arabian, Eurasian and Indian plate. I want to know if the obduction and post obduction history of ophiolite can be related to regional tectonic frame work of this region. whether the obduction itself is resulted by tectonic uplift, exhumation of Zagros orogeny? or what else? ideas and data? suggestions?

Network

Cited By

Projects

Projects (4)
Project
The Franklin Mountains of west Texas are an important record of Post-Grenvillian magmatism (~1.1 Ga) in southwestern Laurentia. They expose the Red Bluff Granite Suite, a suite of less-evolved quartz syenite to differentiated leucogranites that are possibly related to coeval basaltic magmas. These rocks are characterized by bi-modal intrusive and volcanic rocks, that are classified as a metaluminous, within-plate, A-type granitic suite which intruded the Proterozoic shelf and emplaced at ~1.1 Ga. In this project, we are using whole-rock major, trace and rare earth element data and zircon U-Pb and Hf isotope compositions of spatially-related granitic and basaltic rocks emplaced within the Red Bluff Granite Suite. This, coupled with previous U-Pb-Hf data, and regional geochemical evolution will provide more robust constraints to understand the timing and magma sources with implications for the geodynamic evolution of the post-Grenvillian Southwestern Laurentian front.
Project
The project is based on zircon U-Pb geochronology, Hf isotopes composition, mineralogy and geochemistry of igno-metamorphic basement underneath Sirte Basin Libya. We have already acquired U-Pb and Hf isotopic data and currently writing the manuscript.