龙门山雁门坝地区下、中泥盆统界线的腕足动物序列

doi:10.3863/j.issn.1000-2634.1988.02.02

西南石油大学学报(自然科学版) ›› 1988, Vol. 10 ›› Issue (2): 11-21.DOI: 10.3863/j.issn.1000-2634.1988.02.02

龙门山雁门坝地区下、中泥盆统界线的腕足动物序列

邓涛

(石油勘探系)

收稿日期:1987-10-09 修回日期:1900-01-01 出版日期:1988-04-20 发布日期:1988-04-20

BRACHIOPOD SEQUENCE AROUND THE LOWER-MIDDLE DEVONIAN BOUNDARY FROM YANMENBA OF LONGMEN, SICHUAN

DENG Tao

(Department of Geological Exploration)

Received:1987-10-09 Revised:1900-01-01 Online:1988-04-20 Published:1988-04-20

摘要/Abstract

摘要： 本文在龙门山雁门坝泥盆系剖面下中统交界区划分出4个腕足化石带。依据现代终层学原则，将下中统界线确定在甘溪组顶部，以Xenospiriferfongi的首次出现为标志，此界线与国际界线层型相当。文中提出了在无指定化石带地区确定年代地层单位界线的方法。论证该段剖面沉积环境属泥质浅海陆栩。描述4个腕足动物新种。

关键词: 四川省, 雁门坝地区, 泥盆纪, 腕足动物序列, 地层分区

Abstract:

Four brachiopod zones are divided in the member of section at Yanmenba of Mt. Longmen .According to the principle of modern stratigraphy, the Lower-Middle Devonian boundary is drawn in the Euryspirifer yanme-nbaensis-Xenospirifer fongi Zone at the top of the Ganxi Formation, and the first appearance of Xenospirijer fungi is regarded as a sign. This boundary corresponds to the international bounbary-stratotype .A method is put forward to define a boundary between chronostratigraphic is units in a region without indicated fossil zones. It is proved that the sedimentary environment is a muddy shelf in the section member. Four new bracniopod species are described.

Key words: Sichuan, Mt longmen, Lower-middle Devonian, Brachiopod sequence

邓涛. 龙门山雁门坝地区下、中泥盆统界线的腕足动物序列[J]. 西南石油大学学报(自然科学版), 1988, 10(2): 11-21.

DENG Tao. BRACHIOPOD SEQUENCE AROUND THE LOWER-MIDDLE DEVONIAN BOUNDARY FROM YANMENBA OF LONGMEN, SICHUAN [J]. 西南石油大学学报(自然科学版), 1988, 10(2): 11-21.

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龙门山雁门坝地区下、中泥盆统界线的腕足动物序列

BRACHIOPOD SEQUENCE AROUND THE LOWER-MIDDLE DEVONIAN BOUNDARY FROM YANMENBA OF LONGMEN, SICHUAN

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