CAJ | 학술논문

　　阿尔泰南缘发育大量火山岩及硫化物-Fe 多金属矿床。从东向西,成矿元素组合依次为 Pb-Zn、Fe-Pb-Zn和Cu-Zn。本文对阿尔泰南缘东部的萨吾斯矿床的火成岩做了主微量元素、Sr-Nd和锆石Hf-O同位素及闪锌矿的Pb同位素组成测定。对比了阿尔泰南缘东部、中部和西部5个铁-硫化物矿床的Pb和Sr-Nd同位素。康布铁堡组流纹岩来自于多旋回风化-剥蚀-搬运-再沉积碎屑物质的重熔,富集Zn,表现出碎屑物质的微量元素特征,导致萨吾斯和可可塔勒 Pb-Zn 矿床的高207Pb/204Pb、208Pb/204Pb 及低206Pb/204Pb、εNd(t)。康布铁堡组下亚组中基性火山喷发为蒙库Fe矿的初始富集奠定了基础。中部的克兰盆地形成于洋陆过渡弧或属弧间盆地,康布铁堡组中下段中基性火山岩和上段流纹岩分别为Fe和Zn的富集奠定了基础,碳酸盐岩则造成了Pb的富集,从而形成铁木尔特Fe-Pb-Zn矿床。铁木尔特和蒙库矿床的206Pb/204Pb比值最高且变化大,反映了大洋岛弧火山岩的特征。在西部,阿舍勒组富镁英安岩来自流体交代的地幔楔,导致了阿舍勒矿床Cu的富集,赋矿岩石的εNd(t)值高,(87Sr/86Sr)i和矿石Pb同位素比值低。
　　아이태남연발육대량화산암급류화물-Fe 다금속광상。종동향서,성광원소조합의차위 Pb-Zn、Fe-Pb-Zn화Cu-Zn。본문대아이태남연동부적살오사광상적화성암주료주미량원소、Sr-Nd화고석Hf-O동위소급섬자광적Pb동위소조성측정。대비료아이태남연동부、중부화서부5개철-류화물광상적Pb화Sr-Nd동위소。강포철보조류문암래자우다선회풍화-박식-반운-재침적쇄설물질적중용,부집Zn,표현출쇄설물질적미량원소특정,도치살오사화가가탑륵 Pb-Zn 광상적고207Pb/204Pb、208Pb/204Pb 급저206Pb/204Pb、εNd(t)。강포철보조하아조중기성화산분발위몽고Fe광적초시부집전정료기출。중부적극란분지형성우양륙과도호혹속호간분지,강포철보조중하단중기성화산암화상단류문암분별위Fe화Zn적부집전정료기출,탄산염암칙조성료Pb적부집,종이형성철목이특Fe-Pb-Zn광상。철목이특화몽고광상적206Pb/204Pb비치최고차변화대,반영료대양도호화산암적특정。재서부,아사륵조부미영안암래자류체교대적지만설,도치료아사륵광상Cu적부집,부광암석적εNd(t)치고,(87Sr/86Sr)i화광석Pb동위소비치저。
Voluminous volcanic rocks and numerous sulfide-Fe deposits occur in the southern Chinese Altay Mountains. From the east to the west, metallogenetic associations vary from Pb-Zn through Fe-Pb-Zn to Cu-Zn. This study performed major and trace element, Sr-Nd and zircon Hf-O and sphalerite Pb isotopic analyses of volcanic rocks and ore minerals of the Sawusi Zn-Pb deposit in the east of the southern Chinese Altay. Sulfide Pb and volcanic-rock Sr-Nd isotopic compositions of five representative Fe-sulfide deposits from the east, middle and west of the southern Chinese Altay are compared. Rhyolites of the Early Devonian Kangbutiebao Formation were derived from detrital materials. The latter experienced poly-cycled weathering, erosion, transportation and re-deposition from the Gondwana land through the Tuva-Mongol or from the Caledonian province to the Chinese Altay, which itself was compressed and uplifted at~400 Ma, and finally delivered to the then trench on the south after erosion from top of the Chinese Altay Mountains. These poly-cycled detrital materials are rich in Zn, possess arc or continental trace element characteristics, and caused high 207Pb/204Pb, 208Pb/204Pb and low 206Pb/204Pb,εNd(t) in the Sawusi and Keketale Pb-Zn deposits in the east of the southern Chinese Altay. The intermediate-basic volcanic eruption resulted in initial enrichment of Fe for the Mengku deposit. The Kelan basin in the middle of the southern Chinese Altay was formed in the ocean continent transition arc or was an interarc basin. In the Kelan basin, intermediate-basic volcanic rock in the middle-lower section and rhyolite in the upper section respectively resulted in Fe and Zn mineralization, whereas Pb mineralization was related to carbonate. These rocks collectively contributed to the formation of the Tiemuerte Fe-Pb-Zn deposit. The Tiemuerte and Mengku deposits exhibit high and variable 206Pb/204Pb, a characteristic of intra-oceanic arc volcanic rocks. The host rock of the Ashele Cu deposit, the west of the southern Chinese Altay, exhibit high εNd(t) and low (87Sr/86Sr)i and Pb isotopic ratios. Mg-rich dacites as derived from the slab fluid-metasomatized mantle wedge resulted in Cu mineralization.