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Geology, geochronology, and geochemistry of the siruyidie’er prospect, Taxkorgan: A possible Miocene porphyry Mo ± Cu deposit in the Central Pamir

Published on Feb 1, 2019in Ore Geology Reviews 3.99
· DOI :10.1016/j.oregeorev.2019.01.009
Ruihua Li (PKU: Peking University), Hegen Ouyang (CAS: Chinese Academy of Sciences)+ 1 AuthorsYongfeng Zhu16
Estimated H-index: 16
(PKU: Peking University)
Abstract The Pamir and Tibetan plateaus, which have a similar terrane structure and evolutionary history since the Phanerozoic, are both host abundant Eocene to Miocene intrusions, however, unlike the Tibetan plateau, coeval porphyry deposits appear to be devoid in the Pamir plateau. In this study, we first report a potentially economic Cu-bearing sulfide mineralization at Siruyidie’er prospect in the Central Pamir. The Siruyidie’er prospect is characterized by the development of 14 breccia pipes in the north block and of Cu-bearing sulfide veins in the south block. Field evidence indicates that the brecciation and mineralization are intimately related to the intrusion of granite porphyry. Zircon U-Pb dating of the granite porphyry yields an age of 13.74 ± 0.21 Ma. This age overlaps with the hydrothermal muscovite 40 Ar/ 39 Ar data of 13.68 ± 0.17 Ma, which confirms the hydrothermal activity and mineralization at Siruyidie’er prospect are induced by the granite porphyry. The granite porphyries are shoshonitic in composition and have high K 2 O (6.03–6.46 wt%; K 2 O/Na 2 O = 1.70–1.92), Ba (2983–3316 ppm), LREE (317–363 ppm) and Sr (331–378 ppm), and low MgO (0.54–0.63 wt%), Cr (6.73–8.28 ppm) and Y (7.88–9.91 ppm) contents. The rocks are LREE-enriched ((La/Yb) N  = 53–66) and display weakly negative Eu (Eu/Eu *  = 0.79–0.87), positive LILES (Ba, Rb, and K) and negative HFSEs (Th, U, Nb, Ta, Ti, and Y) anomalies. They have enriched Hf isotopic compositions with ɛ Hf (t) values ranging from –8.78 to −5.01. The combined major and trace elements and Hf isotopic characteristics of the granite porphyries suggest that the primitive magmas were produced by high extent partial melting of an ancient crust source, possibly a thickened lower crust in the garnet stability field. A comparison of the granite porphyries at Siruyidie’er prospect with Eocene to Miocene ore-forming granitic porphyries of the Tibetan plateau reveals that the granite porphyries have lower water contents and originated from a continental crust rather than a depleted mantle source. Based on geological, compositional, and age data, we propose that the Siruyidie’er prospect has a potential to form porphyry Mo ± Cu deposit. This study provides the first direct evidence for the possible presence of porphyry Mo ± Cu deposit in the Pamir plateau.
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Published on Jan 1, 2018in Earth and Planetary Science Letters 4.58
W. D. Li97
Estimated H-index: 97
(CAS: Chinese Academy of Sciences),
Yun Chen18
Estimated H-index: 18
(CAS: Chinese Academy of Sciences)
+ 4 AuthorsBihong Fu4
Estimated H-index: 4
(CAS: Chinese Academy of Sciences)
Abstract The Pamir has experienced more intense deformation and shortening than Tibet, although it has a similar history of terrane accretion. Subduction as a primary way to accommodate lithospheric shortening beneath the Pamir has induced the intermediate-depth seismicity, which is rare in Tibet. Here we construct a 3D S-wave velocity model of the lithosphere beneath the Pamir by surface wave tomography using data of the TIPAGE (Tien Shan–Pamir Geodynamic program) and other seismic networks in ...
6 Citations Source Cite
Published on Jan 1, 2018in Earth and Planetary Science Letters 4.58
James B. Chapman9
Estimated H-index: 9
(UA: University of Arizona),
Shane Scoggin1
Estimated H-index: 1
(UA: University of Arizona)
+ 5 AuthorsMustafo Gadoev8
Estimated H-index: 8
(Tajik Academy of Sciences)
Abstract New geochronologic, geochemical, and isotopic data for Mesozoic to Cenozoic igneous rocks and detrital minerals from the Pamir Mountains help to distinguish major regional magmatic episodes and constrain the tectonic evolution of the Pamir orogenic system. After final accretion of the Central and South Pamir terranes during the Late Triassic to Early Jurassic, the Pamir was largely amagmatic until the emplacement of the intermediate ( SiO 2 > 60 wt. % ), calc-alkaline, and isotopically ...
9 Citations Source Cite
Published on Jan 1, 2018in Tectonophysics 2.69
Chuan-Lin Zhang3
Estimated H-index: 3
(Hohai University),
Haibo Zou28
Estimated H-index: 28
(AU: Auburn University)
+ 1 AuthorsXiang-Yan Chen1
Estimated H-index: 1
(AU: Auburn University)
Abstract The Pamir Plateau at the western end of the India–Asia collision zone underwent long-term terrane drifting, accretion and collision between early Paleozoic and Mesozoic. However, the detailed evolution of this plateau, in particular, the timing of the Proto- and Palaeo-Tethys ocean subduction and closure, remains enigmatic. Here we report new field observations and zircon U-Pb ages and Hf isotopic compositions of the representative rocks from the so-called Precambrian basement in the no...
6 Citations Source Cite
Published on May 1, 2017in Earth and Planetary Science Letters 4.58
Ellen Kooijman10
Estimated H-index: 10
(Swedish Museum of Natural History),
Matthijs A. Smit12
Estimated H-index: 12
(UBC: University of British Columbia)
+ 1 AuthorsAndrew R.C. Kylander-Clark21
Estimated H-index: 21
(UCSB: University of California, Santa Barbara)
Abstract Crustal foundering is an important mechanism in the differentiation and recycling of continental crust. Nevertheless, little is known about the dynamics of the lower crust, the temporal scale of foundering and its role in the dynamics of active margins and orogens. This particularly applies to active settings where the lower crust is typically still buried and direct access is not possible. Crustal xenoliths derived from mantle depth in the Pamir provide a unique exception to this. The ...
10 Citations Source Cite
Published on Apr 1, 2017in Lithos 3.86
Pablo Lara1
Estimated H-index: 1
(Macquarie University),
Pedro Oyhantçabal15
Estimated H-index: 15
Kelsie A. Dadd10
Estimated H-index: 10
(Macquarie University)
Abstract Post-collisional, granitic magmatism with high-barium-strontium (HiBaSr) content and shoshonitic affinity has been recently recognized both in the southern section of the Dom Feliciano Belt of Uruguay and its cratonic foreland. This group of granitic rocks has a distinctive age, mineralogy, chemistry and field characteristics. New zircon U–Pb LA-ICP-MS data for three of the plutons confirm their Late Neoproterozoic age; 634 ± 7.3 (Sierra de los Caracoles), 604 ± 3.0 Ma (Cortez Blanco) a...
15 Citations Source Cite
Published on Jan 1, 2017in Ore Geology Reviews 3.99
Zhen-Ju Zhou6
Estimated H-index: 6
(PKU: Peking University),
Hao-Shu Tang10
Estimated H-index: 10
(CAS: Chinese Academy of Sciences)
+ 1 AuthorsZheng-Le Chen1
Estimated H-index: 1
Abstract The large Zankan iron deposit is hosted in the pre-Devonian Bulunkuole metamorphic complex within the Taxkorgan terrane, West Kunlun Orogen, southwestern China. The deposit is unique for its mineral association of magnetite, pyrite and anhydrite in variable proportions, forming disseminations, banded and massive ores. Magnetite grains from the ores show variable contents of many elements, such as Mg (182–1167 ppm), Al (198–2691 ppm), Ti (898–1677 ppm), V (112–8468 ppm), Mn (821–4695 ppm...
9 Citations Source Cite
Published on Feb 1, 2016in Lithos 3.86
Zhiming Yang18
Estimated H-index: 18
(JCU: James Cook University),
Zengqian Hou26
Estimated H-index: 26
+ 5 AuthorsBo Xu4
Estimated H-index: 4
Abstract Jiru is a poorly studied Cu deposit located in the west segment of the Gangdese porphyry Cu belt (GPCB), 200 km west of Lhasa. The deposit consists of both collisional- and postcollisional-stage porphyry-type Cu systems, which are genetically associated with the early Eocene granitoid batholith and the Miocene Jiru porphyry stock, respectively. In this study, we present zircon U–Pb LA-ICP-MS dates and Hf isotopes, whole rock geochemical and Pb isotope geochemical data for the main intru...
12 Citations Source Cite
Published on Feb 1, 2016in Earth and Planetary Science Letters 4.58
Sofia-Katerina Kufner4
Estimated H-index: 4
Bernd Schurr19
Estimated H-index: 19
+ 8 AuthorsFrederik Tilmann29
Estimated H-index: 29
Abstract Subduction of buoyant continental lithosphere is one of the least understood plate-tectonic processes. Yet under the Pamir–Hindu Kush, at the northwestern margin of the India–Asia collision zone, unusual deep earthquakes and seismic velocity anomalies suggest subduction of Asian and Indian lithosphere. Here, we report new precise earthquake hypocenters, detailed tomographic images and earthquake source mechanisms, which allow distinguishing a narrow sliver of Indian lithosphere beneath ...
64 Citations Source Cite
Published on Oct 1, 2015in Ore Geology Reviews 3.99
Jeremy P. Richards37
Estimated H-index: 37
(U of A: University of Alberta)
Abstract This paper reviews the tectonic, magmatic, and metallogenic history of the Tethyan orogen from the Carpathians to Indochina. Focus is placed on the formation of porphyry Cu ± Mo ± Au deposits, as being the most characteristic mineral deposit type formed during both subduction and collisional processes in this region. Relatively little is known about the history of the Paleotethys ocean, which opened and closed between Gondwana and Eurasia in the Paleozoic, and few ore deposits are prese...
81 Citations Source Cite
Published on Sep 1, 2015in Economic Geology 3.29
Zengqian Hou3
Estimated H-index: 3
(NU: Northwestern University),
Lianfeng Duan2
Estimated H-index: 2
+ 8 AuthorsZhidan Zhao41
Estimated H-index: 41
(China University of Geosciences)
Magmatic-hydrothermal ore deposits in collisional orogens are new targets for modern mineral exploration, yet it is unclear why they preferentially occur in some specific tectonic environments within these orogenic belts. We integrate geologic and geochemical data (especially zircon U-Pb dating and Lu-Hf isotope data) for Mesozoic-Cenozoic magmatic rocks and associated ore deposits in the Lhasa terrane, a highly endowed tectonic unit within the Himalayan-Tibetan orogen, and provide the first exa...
80 Citations Source Cite
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