Field Excursion Introduction for IGCP 679 1&amp;lt;sup&amp;gt;st&amp;lt;/sup&amp;gt; International Symposium: Progress in Cretaceous Geology in Shandong Province, China

Kemin Xu,Xiuzhang Li,Fuzhong Zhang,Youping Wang,Xueqiang Zhu,Zhenguo Ning,Gang Li,Jie Qin

doi:10.4236/ojg.2019.910085

Abstract

The non-marine Cretaceous sequences are well developed in the relict basins, i.e. the Luxi basin in the west, and the Jiaolai basin in the east of Shandong Province. The Lower Cretaceous Santai Formation (140 - 136 Ma) in the Luxi basin contains aeolian dune deposits, which were formed under the control by westerly. The Cretaceous strata of the Jiaolai basin are divided into three groups: i.e. in ascending order, the Laiyang, Qingshan and Wangshi groups. New SHRIMP zircon U-Pb radiometric dating data demonstrated six Cretaceous volcanism episodes. The lower part of the Wangshi Group should be assigned to the upper Lower Cretaceous. An Ir anomaly recovered in the lower Jiaozhou Formation suggests that the Cretaceous/Palaeogene boundary would be in the interval between 537.3 - 537.4 m in the borehole JK1. At last the detailed information about the pre-symposium field excursion was introduced.

Highlights

The study of Cretaceous geology in Shandong began in the early 1920s
The non-marine Cretaceous sequences are well developed in the relict basins, i.e. the Luxi basin in the west, and the Jiaolai basin in the east of Shandong Province
The Cretaceous strata of the Jiaolai basin are divided into three groups: i.e. in ascending order, the Laiyang, Qingshan and Wangshi groups

Summary

Introduction

The study of Cretaceous geology in Shandong began in the early 1920s. Since palaeontologists begun to find in the Cretaceous strata abundant fossils, like megaplants, bivalves, gastropods, ostrocods, clam shrimps, insects, fish and dinosaurs. The Cretaceous is divided into the Santai Formation, the Laiyang, Qingshan and Wangshi groups. Shandong Province has become a hot research area because of its extremely special geotectonic position. We would like to summarise new progress in Cretaceous research in Shandong Province, and to introduce the pre-symposium field excursion

Geological Setting

New Results

Pre-Symposium Field Excursion