摘要
火山活动是一种重要的地质现象，它的发生总是与构造运动相关联，构造运动有强有弱，持续时间有长有短，具有旋目性，火山活动同样也具有旋回性。大规模的火山喷发往往会对气候变化产生影响，而影响的程度取决于火山所处的位置和喷发的性质及程度。强烈的火山喷发将造成局部地区乃至全球气温下降，由此人们推测火山喷发多发生在冰期，然而统计资料表明，绝大多数火山喷发发生在间冰期，此时的构造运动也比较活跃，而在冰期时很少有火山喷发。至于火山喷发后在短时间内造成的降温与长时间的冰期不能相提并论。火山活动有旋回性，它影响的气候变化也具备有旋回性，这是构造气候旋回的一种表现形式。
Volcanic activities are always accompanied with a large scale of tectonic activities .The most explosive periods are almost consistent with most active periods of tectonicmovements. Meantime the tectonic-volcanic activities are related to a large areal orglobal climatic changes.After collision between india and Eurasia Plates, occurred during about in 45-10MaB. P., there were a large volume of intermediate-acidic rocks in Gangdisi,southern Tibet during the same period. The another upsurge of volcenic activities generated during about 37~ 35MaB.P. There are a large volume of volcanic rocks inTibetan Plateau and eastern continental rift are4 respectively , correlating with a largescale of tectonic movement in 37- 35MaB.P. It is not only style change of volcanicactivities at 0.73MaB. P. but also rapidly climatic change occurring at 0.8MaB. P.Volcanic activities stabed at 0.73MaB. P. in many areas, such as Ashikelo volcanic eruption and Datong volcanic eruptions etc. which started to enter the upsurges ofvolcanic activities , and about meantime several other volcanic eruptions were nearceased .In thes paper, the volcanic activities of QUaternary in China were correlated withglacial period / interglacial periods based on the data of volcaic rock ages. Theupsurges of volcanic activities of Quaternary in China including both Tibet andEastern continental rift system occurred during 1.50- 1.10MIB. p., 0.73- 0.20MaB. P.,0.12- 0.07MaB. P. and 0.01 - 0MaB. P. respectively . They were mainly correlated withthe four interglacial periods, respectively . In Quaternary , most of volcanic eruptionsgenerated during interglacial periods in China.1.50- 1.10MaB. P. belongs to Longgang volcanic astivity episode which is thefirst upsurge of volcanic eruptions in Quaternary in China, forming volcanic rocks distributed in Xiaoyizishan Mountain, Longgang, Jiashan, Anhui Province. BaitoushanMountain volcanic activity episode that duration is 0.73- 0.20MaB.P. correlated withanother inter-glacial Period too.
出处
《第四纪研究》
CAS
CSCD
北大核心
1998年第3期222-228,共7页
Quaternary Sciences
基金
国家自然科学基金!49894170
中国科学院重大项目
