中国大陆岩石圈壳幔韧性剪切带系统蔡学林.pdfVIP

15 3 (();) V o .15 N o .3 2008 5 Earth Sci ence Fronti ers (Chi na U niversit y of Geosciences, Beijing;Peking U niversit y ) M ay 2008 蔡学林, 　曹家敏, 　朱介寿, 　程先琼 , 6 10059 Cai X ue in, 　Cao Jiamin, 　Zhu Jieshou, 　Cheng X ianqiong Cheng du Uni v ersi ty of Tech no logy , Cheng d u 6 10059, Chi na Cai Xuelin, Cao Jiamin, ZhuJieshou, et al.The system of crust-mantle ductile shear zones in China continental lithosphere. Earth Science Frontiers , 2008, 15(3):036-054 bstract:T he str uctura ana y ses o f many seismic so unding prof i es indicate that there are tw o f au t sy stem s in China continenta itho sphe re, w hich are diff erent obvio us y and cor re a tive c o se y :o ne is the sha ow f au t sy stem composed o f ducti e-britt e shear zones main y in surf ace cru st, and the o ther is deep f au t system main- y co mpo sed of cru st-mant e ducti e shea r zo ne s, w hich cuts the M oho.Based o n the char acte ristic o f seismic w av e ve o city a nd the resu t o f petro o gy and geo chemistry of deep str ucture, w e divide the sy stem o f cru st- mant e ducti e shear zo ne s in China continenta itho sphere into three c asses a nd f ive ty pe s:(1)tr ench subduc- tion zo ne s in mar gina sea o f co ntinenta itho sphere;(2)co ision suture be ts in continenta ithospher e;(3) compressive ducti e shea r zones for cru st-mant e;(4 )ex pa nded ducti e shear zo nes fo r c ru st-mant e;(5 ) strike-s ip ducti e shear zo nes fo r cru st-mant e.T hen w e construct a mo de o f tecto nic def orma tion o f China continenta ithosphere, w hich ex pands f rom the surf ace to the deep and fro m the cru st-mant e transitio n zo ne to the upper and midd e cru sts.A s the cru st-mant e duc ti e shear zone is bo th a channe fo r inor ganic