大兴安岭阿龙山地区流纹岩风化的地球化学特征  

GEOCHEMISTRY OF RHYOLITE WEATHERING OF ALONGSHAN, GREATER XING'AN MOUNTAINS

作　　者：马力[1] 郝立波[1] 潘军[1] 刘洪涛 段国政[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026 [2]辽宁省东北冶金地质勘查局,辽宁鞍山114002

出　　处：《吉林大学学报（地球科学版）》2003年第3期296-299,314,共5页Journal of Jilin University：Earth Science Edition

基　　金：中国地质调查局资助项目(20002010002106)

摘　　要：通过大兴安岭地区两个流纹岩风化剖面的研究发现,大兴安岭地区的岩石风化过程具有特殊性。风化过程分为两个阶段,即以化学风化为主导的基质风化阶段和以机械风化为主导的斑晶风化阶段,第二阶段显示出与正常风化剖面相反的风化趋势。低温和长冬使第二风化阶段延长,并呈现逆风化趋势。风化过程中Fe和Al始终处于流失状态。上述特征的产生是由原岩的结构及成分、气候因素和生态系统等多种因素作用的结果。The particularity of weathering processes of rock in Greater Xing'an Mountains was found by analyzing two weathering profile developed on ryolite. The weather progresses can be divided into two stages that are chemistry weathering of matrix and physical weathering of phenocryst. The weathering trend of second stage is contrary to the normal profiles. The low temperature and long winter prolong the weathering progress of second stage which trend of weathering is inversion. Fe and Al were leached from soil of profiles from beginning to end in weathering progress. The features result from multiple factor which include the construction and composition of parent rock , condition of climate, ecosytem, et al.

关 键 词：大兴安岭 阿龙山地区 流纹岩 化学风化 地球化学特征 

分 类 号：P588.141[天文地球—岩石学] P594.2[天文地球—地质学]