摘要
中国的晚新生代火山并不罕见,它们主要分布在东北-华北、东南沿海、台湾北端以及昆仑山区和云南省腾冲县境内.前二区为大陆板内火山,以喷出碱性系列为主.台湾北端是中国唯一的酸性火山岩区.昆仑山和腾冲火山则为陆-陆碰撞型板缘火山,以喷出钙碱系列为主,但昆仑山区以南既有碱钙系列,又有碱性系列.五大连池和白头山等板内火山虽然年青附近却不存在高温水热活动;西藏南部存在板缘高温水热活动,却没有任何近代火山.这一现象表明,地表火山未必是西藏地下存在高温水热资源的必要条件,壳内局部熔融也许是藏南高温水热活动的可几热背景.
The late-Cenozoic volcanoes are not uncommon, and mainly scattered over the northeast and north China, southeastern coastal provinces, northern tip of Taiwan, Kunlun mountainous district and the Tengchong of western Yunnan province. The former two are continental in-traplate volcanoes, and extruded mainly the lava of alkaline series. The volcanoes in northern Taiwan is the unique acidic volcanic area of China. The last two are the interplate volcanoes resulted from collision-convergence between two continental plates, and extruded mainly the calc-alkalinc .series, but the alkalicalcic and alkaline series were also present in the south of Kunlun volcanic zone. Although very young, the Wudalianchi and Baitoushan volcanoes in the northeast China are lack of any high-temperature hydrothermal manifestation. Quite the contrary, high-temperature hydrothermal systems are wide-spread over the southern Tibet despite the lacking of the late-Cenozoic volcano. This implies that volcano is not the necessary condition for producing a subsurficial high-temperature hydrothermal resources. The partial re-melting within the crust may be the probable thermal background for the high-temperature hydrothermal activities in the southern Tibet.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第3期329-335,共7页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
晚新生代
火山
高温水热系统
Late-Cenozoic volcano, Intraplate volcano, Interplate volcano, High-tem-perature hydothermal system, Partial melting within the crust, Thermal background.
