Ultramafic hypoxenoliths found in the alkali-rich porphyry in the Liuhe Village, Heqing, Yunnan, China, are of great significance in understanding the origin and evolution of the porphyry. This paper discusses the min...Ultramafic hypoxenoliths found in the alkali-rich porphyry in the Liuhe Village, Heqing, Yunnan, China, are of great significance in understanding the origin and evolution of the porphyry. This paper discusses the mineralogical features of the hypoxenoliths. It shows that the xenoliths are characterized by the upper mantle rocks modified to certain extent by the enriched mantle fluid metasomatism in the mantle environment, with the enriched mantle property of low-degree partial melting. This constitutes the important mineralogical evidence for the petrogenesis and mineralization of alkali-rich porphyry.展开更多
The North China area is characterized by rifting and rift trenches developed during the Proterozoic, including the Yanliao rift trench, which started forming at 1.8Ga, and the Wumishan Formation, which was deposited d...The North China area is characterized by rifting and rift trenches developed during the Proterozoic, including the Yanliao rift trench, which started forming at 1.8Ga, and the Wumishan Formation, which was deposited during the middle Mesoproterozoic （Cui et al., 2000; Wang et al., 1995）. The rift trough was formed last.展开更多
文摘Ultramafic hypoxenoliths found in the alkali-rich porphyry in the Liuhe Village, Heqing, Yunnan, China, are of great significance in understanding the origin and evolution of the porphyry. This paper discusses the mineralogical features of the hypoxenoliths. It shows that the xenoliths are characterized by the upper mantle rocks modified to certain extent by the enriched mantle fluid metasomatism in the mantle environment, with the enriched mantle property of low-degree partial melting. This constitutes the important mineralogical evidence for the petrogenesis and mineralization of alkali-rich porphyry.
文摘The North China area is characterized by rifting and rift trenches developed during the Proterozoic, including the Yanliao rift trench, which started forming at 1.8Ga, and the Wumishan Formation, which was deposited during the middle Mesoproterozoic （Cui et al., 2000; Wang et al., 1995）. The rift trough was formed last.
