地质科技情报2018，Vol.37Issue(1)：69-73,5.DOI:10.19509/j.cnki.dzkq.2018.0109
塔中北坡顺南5井下奥陶统锶同位素曲线及地层划分
Strontium Isotopic Curve of the Lower Ordovician and the Chronostratigraphic Division of Well Shunnan-5 on Northern Slope of Middle Tarim Basin
摘要
Abstract
Studies on divisions of the Lower Ordovician strata are of great significance in deepening of sedi mentary-structural evolution analysis,and guiding Paleozoic oil and gas exploration on the northern slope of middle Tarim Basin.This paper sets up an evolution curve of the strontium isotopic composition corresponding to the depth of 45 unaltered marine carbonate samples collected from Well Shunnan 5 on this northern slope.The corve is compared with the strontium isotope evolution trend of the global early Ordovician seawater.The strata age is converted according to the Ordovician data-base of 87Sr/86Sr ratio established previously.This study has confirmed the boundary of Yingshan-Penglaiba Formation of Lower Ordovician using the analytic data of strontium isotope of the Well Shunnan 5.The study provides reference for deepening the research of Lower Ordovician stratigraphic division on the northern slope of middle Tarim Basin.关键词
锶同位素地层学/海相地层定年/顺南5井/下奥陶统/塔中北坡Key words
strontium isotope stratigraphy/dating marine sediments/Well Shunnan-5/Lower Ordovician/northern slope of middle Tarim Basin分类
天文与地球科学引用本文复制引用
马庆佑,蒋华山..塔中北坡顺南5井下奥陶统锶同位素曲线及地层划分[J].地质科技情报,2018,37(1):69-73,5.基金项目
国家科技重大专项“塔里木盆地海相黑色泥页岩地层沉积特征及其页岩气潜力研究”(2017ZX05036-001-003) （2017ZX05036-001-003）
