Magmatic switch-on and switch-off along the South China continental margin since the Permian: Transition from an Andean-type to a Western Pacific-type plate boundary
Magmatic switch-on and switch-off along the South China continental margin since the Permian: Transition from an Andean-type to a Western Pacific-type plate boundary
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二叠纪以来华南大陆边缘岩浆的开启与关闭：安第斯型板块边界向西太平洋型板块边界的转变
DOI：
10.1016/j.tecto.2012.02.011
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发表时间：
2012-04
期刊：
影响因子：
2.9
通讯作者：
Li, Wu-Xian
中科院分区：
文献类型：
--
作者：
Li, Zheng-Xiang;Li, Xian-Hua;Chung, Sun-Lin;Lo, Ching-Hua;Xu, Xisheng;Li, Wu-Xian
台湾东部大南坳片岩的碎屑锆石物源数据与其原岩沉积于华南大陆边缘的时间（约150 Ma或之后不久）相一致，而不是如先前所认为的具有外来起源和更古老。的缺席。200 Ma的锆石与造山带和岩浆前缘迁移到华南中部后，由于板块俯冲作用，该地区存在岩浆空区的观点一致。缺乏来自中国南方内陆的投入（即，缺乏1100- 750 Ma和470- 420 Ma的人口），以及一些片岩单元的未成熟性质，表明它们来自附近的沿海地区。另一方面，它们显示出占优势的190- 150 Ma岩浆锆石人口，这表明存在丰富的岩浆岩的年龄沿着沿海地区。这沿着我们新发现的。浙东等地180 Ma I型花岗岩。190- 180 Ma的岩浆岩最近报告的沿海地区，使我们提出一个新的大陆弧开始后，约。沿着沿海地区，在一个岩浆空区后，由于平板俯冲。这个新开始的弧可能持续到大约。90 Ma，以台湾东部的I型花岗质岩石为代表。板块回滚可能导致弧系统在90 Ma后向太平洋撤退，约100 Ma。60- 17 Ma的双峰式岩浆活动标志着南海开启前和开启期间的陆缘伸展。东亚大陆边缘是由280- 90 Ma的安第斯型板块边缘向90 Ma后的西太平洋型板块边缘转化的。
Detrital zircon provenance data for the Tananao schist in eastern Taiwan is consistent with its protolith being deposited on the South China continental margin at around, or soon after, 150Ma, rather than being of an exotic origin and much older as previously suggested. The absence of ca. 200Ma zircons agrees with the presence of a magmatic gap in the region after the orogenic and magmatic front migrated to central South China, due to a flat-slab subduction. The characteristic lack of input from interior South China (i.e., the lack of 1100–750Ma and 470–420Ma populations), and the immature nature of some of the schist units, suggest that they were sourced from the nearby coastal regions. On the other hand, they exhibit a dominant 190–150Ma magmatic zircon population, suggesting the presence of abundant magmatic rocks of that age along the coastal regions. This, along with our newly discovered ca. 180Ma I-type granites from eastern Zhejiang and other ca. 190–180Ma magmatic rocks recently reported from the coastal regions, led us to propose that a new continental arc was initiated after ca. 190Ma along the coastal region after a magmatic gap due to flat-slab subduction. This newly initiated arc likely persisted until ca. 90Ma, and is represented by the I-type granitic rocks in eastern Taiwan. Slab roll-back likely caused the arc system to retreat towards the Pacific Ocean after 90Ma, and ca. 60–17Ma bimodal magmatism adjacent to the South China Sea signifies continental margin extension in the lead-up to, and during, the opening of the South China Sea. We thus argue that the continental margin of East Asia was transformed from an Andean-type plate margin at 280–90Ma, to the present-day Western Pacific-type plate margin soon after 90Ma.
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DOI：
--
发表时间：
2000
期刊：
--
影响因子：
--
作者：
Fan Chun
通讯作者：
Fan Chun
台湾火成岩省：吕宋岛和琉球俯冲系统叠加的大陆裂谷的后果
DOI：
10.1016/0743-9547(94)00040-l
发表时间：
1995
期刊：
Journal of Southeast Asian Earth Sciences
影响因子：
--
作者：
["Sun‐Lin Chung
通讯作者：
["Sun‐Lin Chung
DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
W. Gang
通讯作者：
W. Gang
影响因子：
2.9
作者：
T. Yui;L. Heaman;C. Lan
通讯作者：
T. Yui;L. Heaman;C. Lan
影响因子：
5.3
作者：
M. Faure;J. Charvet
通讯作者：
M. Faure;J. Charvet