古地理学报2017，Vol.19Issue(1)：161-174,14.DOI:10.7605/gdlxb.2017.01.013
陕西富平地区上奥陶统赵老峪组等深流沉积特征及影响因素
Characteristics and influencing factors of contour current deposits in the Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province
摘要
Abstract
The Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province developed contour current deposits.On the basis of the section measured in field survey,the smooth surface rock, rock thin sections and geochemical data,integrated with previous researches,the authors carried out de-tailed studies of the types of contourites,the contourite sequences and the influencing factors of contour current deposits.The results show that:(1 ) The contourites can be classified into two types,i.e.the cal-cilutitic contourite and the calcisiltitic contourite,and two types of contourite sequences were identified,a single contourite sequence and a calcisiltitic-calcilutitic contourite sequence; (2) As the temperature of contour current water mass gets lower and the salinity gets higher,the contour current strength becomes greater; (3) When the temperature of contour current water mass changes from high to low,then to high,and the salinity of the contour current water mass changes from low to high,then to low,the contou-rite sequences changes from fine to coarse and then to fine;(4) Larger palaeowater depth,drier and hot-ter paleoclimate,and lower paleosalinity were favorable for the development of contour current and contour current deposits.关键词
等深流/等深积岩/等深积岩层序/富平地区/上奥陶统/赵老峪组Key words
contour current/contourite/contourite sequence/Fuping area/Upper Ordovician/Zhaolaoyu Formation分类
天文与地球科学引用本文复制引用
黄伟,何幼斌,李华,刘朱睿鸷..陕西富平地区上奥陶统赵老峪组等深流沉积特征及影响因素[J].古地理学报,2017,19(1):161-174,14.基金项目
国家自然科学基金项目（批准号41472096）资助。［Funded by National Nature Science Foundation of China （Grant No．41472096）］ （）
