Petrogenesis of Triassic post-collisional syenite plutons in the Sino-Korean craton: an example from North Korea
Petrogenesis of Triassic post-collisional syenite plutons in the Sino-Korean craton: an example from North Korea
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中朝克拉通三叠纪碰撞后正长岩体的岩石成因：以朝鲜为例
DOI：
10.1017/s0016756808005037
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发表时间：
2008-06
影响因子：
2.3
通讯作者：
Peng Peng
中科院分区：
文献类型：
--
作者：
YB Zhang;HF Zhang;Jinghui GUo;Mingguo Zhai;Peng Peng
摘要 朝鲜境内沿韩国边界分布有十多个三叠纪正长岩体。 Tokdal 杂岩是其中之一，但其独特之处在于它在单斜辉石/角闪石/黑云母/含霞石正长岩主体中掺入了早期辉石岩堆积物。从黑云母正长岩样品中获得的 SHRIMP U-Pb 锆石年龄为 224 ± 4 Ma。辉石岩中的单斜辉石呈带状分布，要么有金云母和磷灰石包裹体，要么有钛铁矿和磁铁矿溶出，可能是在活跃大陆边缘弧环境中高压结晶，然后上升和减压的结果。辉石岩和正长岩富含轻质 REE 和 LILE，但 HFSE 严重贫化，87Sr/86Srt 值为 ~0.7115，ϵNdt 值为 -14 至 -20 (t = 224 Ma)。托克达尔杂岩可能起源于丰富的岩石圈地幔，并在分化过程中经历了幼年物质的同化。这表明中朝克拉通碰撞后岩浆作用的延伸。该杂岩体与中朝克拉通内许多其他三叠纪岩体共同构成了克拉通北缘、南缘和东缘的三个正长岩带，可能导致了其在东亚的最终形态。
Abstract More than ten Triassic syenite plutons are revealed to be distributed in North Korea along the boundary to South Korea. The Tokdal Complex is one of these but is unique in its incorporation of early pyroxenite cumulate in the clinopyroxene/amphibole/biotite/nepheline-bearing syenite main body. A SHRIMP U–Pb zircon age of 224 ± 4 Ma was obtained from a biotite syenite sample. Clinopyroxene in pyroxenite is zoned, with either phlogopite and apatite inclusion or ilmenite and magnetite exsolution, and may have resulted from crystallization at high pressure in an active continental margin arc environment followed by ascent and decompression. The pyroxenite and syenite are enriched in light REE and LILE, but strongly depleted in HFSE, with 87Sr/86Srt values of ~0.7115 and ϵNdt values of −14 to −20 (t = 224 Ma). The Tokdal Complex could have originated from an enriched lithospheric mantle and undergone assimilation of juvenile materials during differentiation. It indicates an extension of post-collisional magmatism in the Sino-Korean craton. This complex along with many other Triassic plutons in the Sino-Korean craton together constitute three syenite belts along the northern, southern and eastern margins of the craton, possibly resulting in its final configuration in eastern Asia.
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影响因子：
3.9
作者：
FREY, FA;GREEN, DH;ROY, SD
通讯作者：
ROY, SD
影响因子：
3.8
作者：
Kwang-Sik Lee;H. Chang;Kye‐Hun Park
通讯作者：
Kwang-Sik Lee;H. Chang;Kye‐Hun Park
影响因子：
--
作者：
P. Buseck;G. Nord;D. Veblen
通讯作者：
P. Buseck;G. Nord;D. Veblen
DOI：
--
发表时间：
2009
期刊：
Geology of Anhui
影响因子：
--
作者：
LI Cong-wen
通讯作者：
LI Cong-wen
DOI：
10.1111/j.1755-6724.2000.tb00493.x
发表时间：
2000-12
期刊：
Acta Geologica Sinica ‐ English Edition
影响因子：
--
作者：
Yan Guohan;Xu Baoliang;Mu Baolei;Wang Guan-yu;Chang Zhaoshan;Chen Ting-li;Zhao Yongchao;W. Xiaofang;Zhang Renhu;Qiao Guangsheng;Chu Zhuyin
通讯作者：
Yan Guohan;Xu Baoliang;Mu Baolei;Wang Guan-yu;Chang Zhaoshan;Chen Ting-li;Zhao Yongchao;W. Xiaofang;Zhang Renhu;Qiao Guangsheng;Chu Zhuyin