Insights into Polyphase Phanerozoic Tectonic Events in SE China: Integrated Isotopic Microanalysis of Detrital Zircon and Monazite
Insights into Polyphase Phanerozoic Tectonic Events in SE China: Integrated Isotopic Microanalysis of Detrital Zircon and Monazite
复制标题
洞察中国东南部多相显生宙构造事件：碎屑锆石和独居石的同位素微区综合分析
DOI：
10.2113/2020/8837978
复制
发表时间：
2020-06
期刊：
影响因子：
2.4
通讯作者：
Kai Lu
中科院分区：
文献类型：
--
作者：
Li-Guang Wu;Xian-Hua Li;Weihua Yao;Xiao-Xiao Ling;Kai Lu
Widespread Paleozoic and Mesozoic granites are characteristics of SE China, but the geodynamic mechanisms responsible for their emplacement are an issue of ongoing debate. To shed new light on this issue, we present an integrated geochronological and isotopic study of detrital zircon and monazite from Cambrian metasandstones and modern beach sands in the Yangjiang region, SE China. For the Cambrian metasandstone sample, detrital zircon displays a wide age range between 490 and 3000 Ma, while monazite grains record a single age peak of 235 Ma. The results suggest that a significant Triassic (235 Ma) metamorphic event is recorded by monazite but not zircon. For the beach sand sample, detrital zircon ages show six peaks at ca. 440, 240, 155, 135, 115, and 100 Ma, whereas detrital monazite yields a dominant age peak at 237 Ma and a very minor age peak at 435 Ma. Beach sand zircon displays features that are typical of a magmatic origin. Their Hf–O isotopes reveal two crustal reworking events during the early Paleozoic and Triassic, in addition to one juvenile crustal growth event during the Jurassic–Cretaceous. The beach sand monazite records intense Triassic igneous and metamorphic events with significant crustal reworking. Such early Paleozoic and Triassic geochemical signatures of detrital zircon and monazite suggest they were derived from granitoids and metamorphic rocks which formed in intraplate orogenies, i.e., the early Paleozoic Wuyi–Yunkai Orogeny and Triassic Indosinian Orogeny. The Jurassic–Cretaceous signature of detrital zircon may reflect multistage magmatism that was related to subduction of the Paleo-Pacific Plate beneath SE China.
登录
查看更多内容
影响因子：
3.5
作者：
D. Rubatto;I. Williams;I. Buick
通讯作者：
D. Rubatto;I. Williams;I. Buick
碰撞造山带大陆碰撞、俯冲、折返和山体塌陷过程中的岩浆作用和大陆净生长：一个视角
影响因子：
5.7
作者：
Song ShuGuang;Wang MengJue;Wang Cao;Niu YaoLing
通讯作者：
Niu YaoLing
影响因子：
5.3
作者：
STEIGER, RH;JAGER, E
通讯作者：
JAGER, E
影响因子：
2.3
作者：
J. Duchesne;J. Liégeois;Viorica Iancu;T. Berza;Dmitry I. Matukov-;M. Tatu;S. Sergeev
通讯作者：
J. Duchesne;J. Liégeois;Viorica Iancu;T. Berza;Dmitry I. Matukov-;M. Tatu;S. Sergeev
影响因子：
2.9
作者：
Zhongjie Zhang;J. Badal;Yinkang Li;Yun Chen;Li‐Qiang Yang;J. Teng
通讯作者：
Zhongjie Zhang;J. Badal;Yinkang Li;Yun Chen;Li‐Qiang Yang;J. Teng