宋家北沟新近—第四纪三门组古环境演化  

DISCUSSION ON THE MAGNETIC SUSEPTIBILITY AND OSTRACODA FOSSIL FROM THE NEOGENE TO QUATERNARY IN SONGJIABEIGOU WEINAN COUNTY SHAANXI PROVINCE

作　　者：王焯[1] 李勇[2] 王曦[1] 

机构地区：[1]中国地质大学(北京)地球科学学院,北京100083 [2]长安大学资源学院,陕西西安710054

出　　处：《新疆地质》2010年第2期209-213,共5页Xinjiang Geology

摘　　要：在对陕西渭南宋家北沟露头剖面实测基础上,通过对35个样点的初始磁化率和频率磁化率测试、介形类化石分类及对化石表面纹饰特征描述等,整合前人在同一剖面研究的古地磁、孢粉、盐度等资料,从多角度探讨宋家北沟新近—第四纪三门组的古环境演化,梳整了三门组下段至上段气候由温暖湿热到寒冷干燥等古环境演变的概况.In this paper, measured outcrop section in Songjiabeigou Weinan in Shaanxi Province, based on 35 samples by the initial magnetic susceptibility and frequency susceptibility testing, classification of ostracodes and characterization of fossil surface, integrated predecessors in the same section of the ancient magnetic, pollen, salt, etc...from warm and moist to cold and drying during Neogene / Quaternary, Explored the environmental evolution of the Songjiabeigou section.

关 键 词：三门组 初始磁化率 频率磁化率 环境演化 

分 类 号：Q911[天文地球—古生物学与地层学]