1研究背景2022年6月10日在四川阿坝藏族羌族州马尔康市发生M_(S) 6.0震群,其中6月10日00时03分09秒发生M_(S) 5.8(M_(L) 6.3)地震,相隔1 h 25 min 25 s发生M_(S) 6.0(M_(L) 6.5)地震,又相隔1 h 58 min 26 s发生M_(S) 5.2(M_(L) 5.6)地...1研究背景2022年6月10日在四川阿坝藏族羌族州马尔康市发生M_(S) 6.0震群,其中6月10日00时03分09秒发生M_(S) 5.8(M_(L) 6.3)地震,相隔1 h 25 min 25 s发生M_(S) 6.0(M_(L) 6.5)地震,又相隔1 h 58 min 26 s发生M_(S) 5.2(M_(L) 5.6)地震。由此可见,在3.5小时内连续发生3次5级以上地震,多次震级相近地震的间隔时间相当短,给震群中每次较强地震发生后的趋势研判增加了难度。展开更多
Conodonts and fusulinids are the two most widely used biotic groups for subdividing and correlating Bashkirian and Moscovian strata. The definition of the base of the Global Moscovian Stage is undecided because there ...Conodonts and fusulinids are the two most widely used biotic groups for subdividing and correlating Bashkirian and Moscovian strata. The definition of the base of the Global Moscovian Stage is undecided because there are many disagreements among existing boundary definition proposals,each of which has disadvantages. Declinognathodus donetzianus is easily recognized but somewhat limited in its paleogeographic distribution. Idiognathoides postsulcatus is slightly more widespread, but it is less easily identified and its occurrences may be diachronous from region to region. Diplognathodus ellesmerensis is easily recognized and even more widespread, but it is usually rare and its ancestry is not adequately known. The Naqing Section of South Guizhou, South China contains diverse conodont evolutionary lineages among different taxa, including Idiognathoides, Idiognathodus, Diplognathodus,Neognathodus, Gondolella and Mesogondolella. There are numerous transitional forms in almost every lineage of the Naqing section, which shows that the prospects for South China to play a critical role in determining the basal Moscovian Stage definition are good.展开更多
文摘1研究背景2022年6月10日在四川阿坝藏族羌族州马尔康市发生M_(S) 6.0震群,其中6月10日00时03分09秒发生M_(S) 5.8(M_(L) 6.3)地震,相隔1 h 25 min 25 s发生M_(S) 6.0(M_(L) 6.5)地震,又相隔1 h 58 min 26 s发生M_(S) 5.2(M_(L) 5.6)地震。由此可见,在3.5小时内连续发生3次5级以上地震,多次震级相近地震的间隔时间相当短,给震群中每次较强地震发生后的趋势研判增加了难度。
基金supported by the Ministry of Science and Technology of China (2006FY120300-8)the Chinese Academy of Sciences (KZCX2-YW-122, KZCX2-YW-Q050603)National Natural Science Foundation of China (NSFC), and the CAS/SAFEA International Partnership Program for Creative Research Teams
文摘Conodonts and fusulinids are the two most widely used biotic groups for subdividing and correlating Bashkirian and Moscovian strata. The definition of the base of the Global Moscovian Stage is undecided because there are many disagreements among existing boundary definition proposals,each of which has disadvantages. Declinognathodus donetzianus is easily recognized but somewhat limited in its paleogeographic distribution. Idiognathoides postsulcatus is slightly more widespread, but it is less easily identified and its occurrences may be diachronous from region to region. Diplognathodus ellesmerensis is easily recognized and even more widespread, but it is usually rare and its ancestry is not adequately known. The Naqing Section of South Guizhou, South China contains diverse conodont evolutionary lineages among different taxa, including Idiognathoides, Idiognathodus, Diplognathodus,Neognathodus, Gondolella and Mesogondolella. There are numerous transitional forms in almost every lineage of the Naqing section, which shows that the prospects for South China to play a critical role in determining the basal Moscovian Stage definition are good.
