扬子准地台南缘下古生界生油岩无定型干酪根中有机质超微化石的发现及其石油地质意义

THE DISCOVERY OF ORGANIC NANOFOSSILS IN AMORPHOUS KEROGEN OF LOWER PALEOZOIC SOURCE ROCKS, SOUTHERN MARGIN OF YANGTZE PARA-PLATFORM, AND ITS SIGNIFICANCE IN PETROLEUM GEOLOGY

邱蕴玉 奚可棠 吴笛

Qiu Yunyu Xi Ketang Wu Di

地质矿产部石油地质中心实验室

Central Laboratory of Petroleum Geology, Ministry of Geology and Mineral Resources

在横跨江南苏、浙、皖、赣、鄂、湘、黔七省的扬子准地台南缘,早古生代广海盆地相及其相邻的深水陆棚相沉积为一套黑色泥岩、黑色含硅泥岩及深灰-黑灰色含泥碳酸盐岩,累计厚度可达500-1000米;有机质十分丰富,泥岩有机碳平均为1-6%,最高可达20%;灰岩平均值为0.8%.

Under scanning electron microscope with an amplification of 5,000-10,000 X,organic nanofossils of marine primitive organisms have been discovered for the first time.They are found in the amorphous kerogen of Lower Paleozoic black claystones of deep water basinal facies and darkgrey impure carbonate rocks of deep water shelf facies at southern margin of Yangtze Para-platform.It is suggested that they belong to a new kind of organic nanofossil.This discovery not only provides direct information for deviding the types of source material and for characterizing its components in this highly mature area,filling up the blankness of such a kind of study,but also adds new data to the study of paleo-environment,paleo-geography and organic facies.This discovery changes the traditional concept,and reveals the actual aspect of source material.

https://doi.org/10.11781/sysydz198604362