Wang CL(王春龙)1; Qin KZ(秦克章)1; Tang DM(唐冬梅)2; Zhou QF(周起凤)2; Shen MD(申茂德)3; Guo ZL(郭正林)3; Guo XJ(郭旭吉)4
Source Publicationactapetrologicasinica
AbstractLocated in the Koktokay pegmatitic ore cluster, eastern Altay, the Arskartor Be-Nb-Mo deposit is a large beryllium deposit, bearing gemstone and associated with Nb, Mo, and Ga mineralization. Rare-mental mineralization was developed both in granite and pegmatite, with sulfides like molybdenite and pyrite formed in the late stage, which is unique in Altai pegmatite province. A study of LA-ICP-MS zircon U-Pb dating combined with Hf isotope analysis on the muscovite-albite granite, beryllium-mineralized muscovite-albite granite and striped pegmatite is conducted, Re-Os dating of molybdenite from different zones of pegmatite is carried out as well. Weighted mean 2t6Pb/2HU ages of zircon are 219.2 +/- 2.9 Ma, 222.6 +/- 4.6 Ma and 218.2 +/- 3.9 Ma respectively, molybdenite Re-Os age is 218.6 +/- 1.3 Ma, indicate that the formation of granite followed by pegmatite, and a short evolution history of the graniticpegmatite system. The epsilon(Hf)(t) values are -0.72 similar to +1.33, -0.36 similar to +1.99 and -0.45 similar to +0.38, with t(DM)(c) values of 1298 similar to 1169Ma, 1279 similar to 1130 Ma and 1282 similar to 1229 Ma, respectively, implying that the source area for granite and pegmatite are similar and from the crustal material of Pre-Cambrian micro-continental blocks probably. The granite and pegmatite were formed by melting of thickened crust under an intra-plate tectonic setting during the post-orogenic stage. We infer the Arskartor pegmatite is LCT type from the association of mineralized elements, source material and tectonic setting. Characteristics of geology, geochemistry and geochronology imply that the muscovite-albite granite was the parent pluton for pegmatite.
Document Type期刊论文
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Wang CL,Qin KZ,Tang DM,et al. geochronologyandhfisotopeofzirconforthearskartorbenbmodepositinaltayanditsgeologicalimplications[J]. actapetrologicasinica,2015,31(8):2337.
APA 王春龙.,秦克章.,唐冬梅.,周起凤.,申茂德.,...&郭旭吉.(2015).geochronologyandhfisotopeofzirconforthearskartorbenbmodepositinaltayanditsgeologicalimplications.actapetrologicasinica,31(8),2337.
MLA 王春龙,et al."geochronologyandhfisotopeofzirconforthearskartorbenbmodepositinaltayanditsgeologicalimplications".actapetrologicasinica 31.8(2015):2337.
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