Temporospatial variation in the late Mesozoic volcanism in southeast China
Temporospatial variation in the late Mesozoic volcanism in southeast China
复制标题
中国东南部晚中生代火山活动的时空变化
DOI：
10.5194/se-10-2089-2019
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发表时间：
2019-11
期刊：
影响因子：
3.4
通讯作者：
Liu Ling
中科院分区：
文献类型：
--
作者：
Li Xianghui;Li Yongxiang;Wang Jingyu;Zhang Chaokai;Wang Yin;Liu Ling
抽象的。东亚(或中国)的岩浆活动(包括火山作用)可为俯冲作用提供关键线索和年龄限制。
古太平洋板块的动力学过程。尽管许多绝对的
喷出岩的同位素年龄已在20世纪80年代至21世纪初公布，
大的不确定性和大的误差阻碍了东南(东南)中国的岩浆活动
被很好地理解。在这项研究中，我们研究了锆石
晚期喷出岩的地质年代学及其时空变化
中国东南部中生代火山作用。我们报告了锆石U-Pb年龄为
石杭构造带新的48个喷发岩样。与.一起
过去十年公布的数据显示，来自中国的291个岩石样本的年龄
编制了∼40个岩石地层单位，潜在地
记录了一个相对完整的历史和空间分布
中国东南部晚中生代火山作用。结果表明，挤出物
岩石横跨∼95 MYR(17782 Ma)，但主要
∼70 myr(160-90 Ma)，其内火山活动早期
早白垩世(145-125年 Ma)是最密集和分布最广的
喷发。我们认为这些年龄代表了
中国东南部燕山期火山作用。在空间上，年龄地理格局
喷出岩表明，最古老和最年轻的年龄群都存在
在沿海岩浆弧(浙江东部和福建)，最
强烈而广泛的年龄群(145-125 Ma)发生在弧后或裂谷盆地(江西东部、浙江中部和广东北部)，这意味着
晚中生代火山活动向西北方向迁移，随后
向东南方向撤退。这种火山迁移模式可能意味着
古太平洋板块向西北俯冲和回滚俯冲
直到白垩纪中期的阿普提安(∼125 Ma)才开始。
Abstract. The magmatism (including volcanism) in East Asia (or China) could provide key clues and age constraints for the subduction and
dynamical process of the Paleo-Pacific Plate. Although many absolute
isotope ages of extrusive rocks have been published in the 1980s–2000s,
large uncertainties and large errors prevent the magmatism in southeast (SE) China from
being well understood. In this study, we investigate the zircon
geochronology of extrusive rocks and temporospatial variations in the late
Mesozoic volcanism in SE China. We reported zircon U–Pb ages of
new 48 extrusive rock samples in the Shi-Hang tectonic belt. Together with
the published data in the past decade, ages of 291 rock samples from
∼40 lithostratigraphic units were compiled, potentially
documenting a relatively complete history and spatial distribution of the
late Mesozoic volcanism in SE China. The results show that the extrusive
rocks spanned ∼95 Myr (177–82 Ma), but dominantly
∼70 Myr (160–90 Ma), within which the volcanism in the early
Early Cretaceous (145–125 Ma) was the most intensive and widespread
eruption. We propose that these ages represent the intervals of the
Yanshanian volcanism in SE China. Spatially, the age geographic pattern of
extrusive rocks shows that both the oldest and youngest age clusters occur
in the coastal magmatic arc (eastern Zhejiang and Fujian), and the most
intensive and widespread age group (145–125 Ma) occurs in a back arc or rifting basin (eastern Jiangxi, central Zhejiang, and northern Guangdong), implying
that the late Mesozoic volcanism migrated northwest and subsequently
retreated southeast. This volcanic migration pattern may imply that the
Paleo-Pacific Plate subducted northwestward and the roll-back subduction did
not begin until the Aptian ( ∼125 Ma) of the mid-Cretaceous.
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影响因子：
3.5
作者：
Bo Zhang;F. Guo;Xiaobing Zhang;Yangming Wu;Guoqing Wang;Liang Zhao
通讯作者：
Bo Zhang;F. Guo;Xiaobing Zhang;Yangming Wu;Guoqing Wang;Liang Zhao
影响因子：
3.5
作者：
Ji-Heng Zhang;Jin-Hui Yang;Jing-Yuan Chen;Fu-Yuan Wu;S. Wilde
通讯作者：
Ji-Heng Zhang;Jin-Hui Yang;Jing-Yuan Chen;Fu-Yuan Wu;S. Wilde
影响因子：
6.1
作者：
Yuejun Wang;W. Fan;Guowei Zhang;Yanhua Zhang
通讯作者：
Yuejun Wang;W. Fan;Guowei Zhang;Yanhua Zhang
影响因子：
5.8
作者：
A. Draut;P. Clift
通讯作者：
A. Draut;P. Clift
影响因子：
1.5
作者：
Fu-Yuan Wu;Jin-Hui Yang;C. Lo;S. Wilde;Dejun Sun;B. Jahn
通讯作者：
Fu-Yuan Wu;Jin-Hui Yang;C. Lo;S. Wilde;Dejun Sun;B. Jahn