| 武夷山南段前寒武纪浅变质岩系的划分与时代 |
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| 引用本文： | 张利民.武夷山南段前寒武纪浅变质岩系的划分与时代[J].地层学杂志,1996,20(1):16-22. |
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| 作者姓名： | 张利民 |
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| 摘 要： | 武夷山南段前寒武纪地层分布较广。从下至上分为楼子坝群、丁屋岭组、南岩组和黄连组。过去因缺乏可靠的微古植物化石证据和同位素地质年龄资料,对其时代归属分歧颇大。为此,作者对该区的前寒武系进行了系统的微古植物取样、分析,参考最近的Nd同位素模式年龄资料,认为:楼子坝群为前震旦系,大致相当于蓟县系与青白口系;丁屋岭组为下震旦统;南岩组和黄连组为上震旦统;江西东南部的"下寒武统炭质板岩"应归入老虎塘组,属上震旦统。
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| 关 键 词： | 前寒武系 地层划分 地质时代 武夷山 |
The Precambrian slightly metamorphosed rock system in the south part of Wuyi Mountain and its age |
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| Abstract: | The precambrian strata in Southwest Fujian are ascendingly divided into Louziba Group, Dingwuling, Nanyuan and Huanglian Formations. There have been quite defferent opinions on the age of these stratigraphical units in the past because of lacking reliable agedetermining microfossils of plant and isotopic data. Based on systematic microfossil sampling and its discrimination in recent years, the present author regards the Louziba Group to be pre-Sinian. Moreover, according to the recent Nd isotopic data, it can be furtherly considered to be the ranging between the Jixianian and Qingbaikouan Periods. Besides, in terms of the microfossil plant assemblages, the Dingwuling Formation is put at the Lower Sinian, the Nanyuan and Huanglian Formations belong to the Upper Sinian. In Southeast Jiangxi, there exists a set of Precambrian strata. Some scholars doubted te existence of Sinian strata in the past because of lacking reliable Sinian fossils in this region, but the present author has dispelled this kind of doubt by collecting a lot of Sinian microplant fossils in this region during the past few years, and the so-called "Early Cambrian carbonaceous slate" should be, in fact, of Upper Sinian age. |
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| Keywords: | Precambrian strata stratigraphic division geological age Wuyi Mountain |
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