This paper briefly summarizes an officially ratified Global Standard Stratotype-section and Point （GSSP） and a proposed GSSP for global stages of the Cambrian System. The Luoyixi section near Luoyixi town, Guzhang, ...This paper briefly summarizes an officially ratified Global Standard Stratotype-section and Point （GSSP） and a proposed GSSP for global stages of the Cambrian System. The Luoyixi section near Luoyixi town, Guzhang, northwestern Hunan is ratified as the boundary stratotype for the base of the global Guzhangian Stage, which is the upmost stage of an unnamed series termed provisionally as Cambrian Series 3. The GSSP position lies 121.3 m above the base of the Huaqiao Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Lejopyge leavigata.The Duibian B section at Duibian village, Jiangshan, western Zhejiang, is proposed as the boundary stratotype for the base of the proposed global Jiangshanian Stage that is the second stage of the Furongian Series. The proposed GSSP position lies 108.12 m above the base of the Huayansi Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalius. This horizon is also with the first appearance of the cosmopolitan polymerid trilobite lrvingella angustilimbata.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
The International Commission on Stratigraphy and the IUGS Executive Committee have recently approved a Global Standard Stratotype-section and Point(GSSP)defining the base of the second stage of the Furongian Series,Ca...The International Commission on Stratigraphy and the IUGS Executive Committee have recently approved a Global Standard Stratotype-section and Point(GSSP)defining the base of the second stage of the Furongian Series,Cambrian System.This stage is named the Jiangshanian Stage,after Jiangshan City,western Zhejiang Province,China,where the GSSP is located.The GSSP is exposed in a natural outcrop near Duibian Village.It is defined at the base of a limestone(wackestone)layer 108.12 m above the base of the Huayansi Formation in the Duibian B section,coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalis(base of the A.orientalis Zone).The GSSP is at a position of 28°48.977´N latitude and 118º36.887´E longitude.Secondary global markers at or near the base of the stage include the first appearance of the cosmopolitan polymerid trilobite Irvingella angustilimbata,which coincides with the FAD of the primary marker in the stratotype section,and near the end of a large positive carbon isotopic excursion(SPICE excursion).Faunal turnovers close to the base of the Jiangshanian Stage have been recognized as being at the base of the Iverian Stage in Australia,the Gonggrian Stage in Korea,and the Agnostotes orientalis–Irvingella perfecta Zone in Siberia,and near the base of the Aksayan Stage in Kazakhstan,the Sunwaptan Stage in Laurentia,and the Parabolina brevispina Zone in Baltica.展开更多
In this work a simulated B-L model at Large Hadrons Collider is presented using Monte Carlo si- mulation software. B-L model is one of the scenarios proposed to add an extension of the standard models. B-L model predi...In this work a simulated B-L model at Large Hadrons Collider is presented using Monte Carlo si- mulation software. B-L model is one of the scenarios proposed to add an extension of the standard models. B-L model predicts the existence of three new particles at the LHC. They are a new neutral massive gauge boson, three heavy neutrinos and a heavy Higgs boson.展开更多
基金supported by the Ministry of Science and Technology of China (2006FY120300)the State Key Laboratory of Palaeobiology and Stratigraphy (20091103)funded by the National Natural Science Foundation of China (40072003, 40023002, 40332018, 40672023, 40602002)
文摘This paper briefly summarizes an officially ratified Global Standard Stratotype-section and Point （GSSP） and a proposed GSSP for global stages of the Cambrian System. The Luoyixi section near Luoyixi town, Guzhang, northwestern Hunan is ratified as the boundary stratotype for the base of the global Guzhangian Stage, which is the upmost stage of an unnamed series termed provisionally as Cambrian Series 3. The GSSP position lies 121.3 m above the base of the Huaqiao Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Lejopyge leavigata.The Duibian B section at Duibian village, Jiangshan, western Zhejiang, is proposed as the boundary stratotype for the base of the proposed global Jiangshanian Stage that is the second stage of the Furongian Series. The proposed GSSP position lies 108.12 m above the base of the Huayansi Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalius. This horizon is also with the first appearance of the cosmopolitan polymerid trilobite lrvingella angustilimbata.
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.
基金supported in part by grants from the State Key Laboratory on Palaeobiology and Stratigraphy,(2009110320121101)+2 种基金the Ministry of Science and Technology of China(2006FY120300)the National Natural Science Foundation of China(41290260,41221001)the National Commission on Stratigraphy of China to Peng.
文摘The International Commission on Stratigraphy and the IUGS Executive Committee have recently approved a Global Standard Stratotype-section and Point(GSSP)defining the base of the second stage of the Furongian Series,Cambrian System.This stage is named the Jiangshanian Stage,after Jiangshan City,western Zhejiang Province,China,where the GSSP is located.The GSSP is exposed in a natural outcrop near Duibian Village.It is defined at the base of a limestone(wackestone)layer 108.12 m above the base of the Huayansi Formation in the Duibian B section,coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalis(base of the A.orientalis Zone).The GSSP is at a position of 28°48.977´N latitude and 118º36.887´E longitude.Secondary global markers at or near the base of the stage include the first appearance of the cosmopolitan polymerid trilobite Irvingella angustilimbata,which coincides with the FAD of the primary marker in the stratotype section,and near the end of a large positive carbon isotopic excursion(SPICE excursion).Faunal turnovers close to the base of the Jiangshanian Stage have been recognized as being at the base of the Iverian Stage in Australia,the Gonggrian Stage in Korea,and the Agnostotes orientalis–Irvingella perfecta Zone in Siberia,and near the base of the Aksayan Stage in Kazakhstan,the Sunwaptan Stage in Laurentia,and the Parabolina brevispina Zone in Baltica.
文摘In this work a simulated B-L model at Large Hadrons Collider is presented using Monte Carlo si- mulation software. B-L model is one of the scenarios proposed to add an extension of the standard models. B-L model predicts the existence of three new particles at the LHC. They are a new neutral massive gauge boson, three heavy neutrinos and a heavy Higgs boson.
