西秦岭早三叠世深水碳酸盐岩沉积演化模式

通过对西秦岭东部早三叠世深水碳酸盐岩层序的研究,将其划分为下层段的碳酸盐缓坡型静海细粒沉积和上层段的碳酸盐陡坡型半深海-深海沉积。文中重点对上层段进行了剖析,共综合出5种相组合,它们在垂向上构成4個向上变薄变细的巨旋回,每一个巨旋回代表一次张裂断陷事件后沿断崖陡坡向盆地堆积的沉积柱,记录了西秦岭海槽在早三叠世逐渐裂解的全过程。     

ICHNOFACIES IN LATE PALEOZOIC DEEP-WATER SLOPE SEDIMENT OF JUNGGAR BASIN AND ITS ENVIRONMENTAL ANALYSIS

This paper mainly discusses 15 kinds of ichnogenus found for the first time in the study area from the water depth distribution, body size of trace fossils and the relationship between sedimentary environment and deep-water ichnofacies, based on the summarizing of the sedimentary character of deep-water slope environment in the study area. According to the relationship between the type of turbidite and the combination of trace fossils, 15 kinds of ichnogenus are divided into two types, transition type Zoophycos ichnofacies and deep-water type Nereites ichnofacies. The former is mainly distributed in the transitional area between proximal to distal area of turbidite and the latter in the distal area.     

准噶尔盆地晚古生代深水斜坡沉积中的遗迹相及其环境分析

本文在概述研究区的深水斜坡(包括半远洋)环境沉积特征的基础上,重点从遗迹化石的水深分布、形体大小和深水遗迹相与沉积环境的关系三个方面对首次发现的15种遗迹属进行了讨论.根据浊积岩类型与遗迹化石组合间的关系,将15种遗迹属划分为过渡型“Zoophycos”遗迹相和深水型“Nereites”遗迹相,前者主要分布于浊积岩的近源—远源区之间的过渡区,后者则分布于远源区.     

西秦岭北带泥盆系中的遗迹化石及其环境意义

本文首先从各种沉积特征扼要讨论了舒家坝组属巨厚的浊积岩系,并对作者在该层系中首次发现的20个遗迹属进行了系统报道,指出其中14个属是在我国泥盆系中首次发现。这些遗迹属大都系典型的深水型分子。它们均可划归入“Nereites”遗迹相内,结合遗迹分子的形态特征和行为习性,重点对舒家坝组属半深海-深海环境进行了详细的论证,从而为本组沉积环境的判识增添了新的依据。