文章基本信息

标题：Geological characteristics and metallogenic age of Tengshan'ao Sn deposit in Dayishan of South Hunan and its prospecting significance
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作者：Zunzun Zhang ; Yongyun Ning ; Youyue Lu 等
期刊名称：Solid Earth Sciences
印刷版ISSN：2451-912X
电子版ISSN：2451-912X
出版年度：2021
卷号：6
期号：1
页码：37-49
DOI：10.1016/j.sesci.2021.01.002
语种：English
出版社：Elsevier
摘要：The Tengshan’ao Sn deposit, located at the Dayishan ore field, Nanling Range, is one of the recently explored deposits in this region. In this study, LA-MC-ICP-MS cassiterite UePb and muscovite 40Ar-39Ar isotopic dating analyses for altered granite-type Sn ores yielded ages of 156.7 ± 4.3 Ma and 151.1 ± 1.5 Ma, respectively. These ages are consistent to the LA-MC-ICP-MS zircon UePb age of the fine-grained two?mica monzogranite (158.2 ± 1.6 Ma), indicating a coeval magmatism and mineralization for the Late Jurassic Tengshan’ao Sn deposit. It is further demonstrated that the formation of this deposit is related to the Early Yanshanian (160-150 Ma) large-scale diagenesis and mineralization in Nanling Range. It is suggested that the late-stage fine-grained two-mica (muscovite) granite has an indicative significance for searching the altered granite type Sn polymetallic mineralization.
关键词：Cassiterite UePb dating;Muscovite 40Ar-39Ar dating;Zircon U-Pb dating;Altered granite type;Tengshan’ao;Dayishan