当今沉积学研究热点讨论——第20届国际沉积学大会评述

第20届国际沉积学大会于2018年8月13日-17日在加拿大魁北克城召开。来自51个国家、930余名专家学者参加了本次会议。基于本届大会论文专题设置情况，指出目前沉积学研究热点主要包含人类世沉积学、湖泊沉积环境、深水沉积过程、“源-汇”系统、微生物岩沉积学及沉积过程模拟等多个主要方面。当前人类活动对地貌影响、沉积物收支平衡影响不容忽视；湖泊沉积砂体研究不仅具有油气勘探价值，而且对古气候研究具有重要意义；沉积深水重力流的流态特征、沉积机理及实地监测等研究取得较大进展；“源-汇”系统研究思想在盆地构造演化、源区母岩性质及沉积物分散样式等方面具有更加实际的指导意义；微生物岩沉积学研究进展包括微生物矿化作用、成岩作用及其对于古地理重建的意义等方面；沉积物风化过程及其在不同环境下搬运及沉积过程是目前沉积学物理、数值模拟的主要内容。就近年来国际沉积学会议热点以及国际重点地质研究计划的实施情况来看，认为深时沉积记录、过程-产物研究方法、多学科交叉渗透是未来若干年内沉积学的发展方向。我国当今沉积学研究以应用沉积学为主，除了重视现代实验分析技术，还应加强野外基本地质研究方法和沉积过程机理研究。在沉积学快速发展的黄金时期，应抓住难得的机遇，不断将我国沉积学研究推向国际先进水平。

Current Hot Topics of Sedimentology: Comment on the 20th International Sedimentological Congress

The 20th International Sedimentological Congress was held in Quebec City (Canada) from August 13th to 17th in 2018. 931 scholars from 51 countries attended this conference. According to the arrangement of sessions in the conference, the current hot topics contain Anthropocene sedimentology, lacustrine sedimentology, deep-water sedimentary process, “source-to-sink” system, microbialites and the simulation of sedimentary process et al. The anthropic influence on modern geomorphological characteristics cannot be unneglected. The study of lacustrine sandbodies is not only meaningful for petroleum exploration and development but also has great implications for paleoclimate. Flow characteristics, sedimentary process and situ monitoring of deep-water sediment gravity flows have made great achievements in recent years. “Source-to-sink” perspectives are instructive to tectonic evolution of sedimentary basin, the nature of parent rocks from provenance area and the sedimentary dispersal characteristics. The recent advancement of microbialites mainly consists of mineralization and diagenesis of microorganisms and their implications for the reconstruction of paleoclimate. The weathering of sedimentary rocks as well as subsequent transportation and sedimentation in different depositional environments have become the main research focus of physical and numerical simulation. According to hot topics of recent meetings of sedimentology and the implementation of major geological plans, deep-time depositional record, process-product study, multidisciplinary investigation will be development directions of sedimentary research in the following years. Current sedimentary research in our country still concentrates on applied sedimentology, we not only pay much attention to modern experimental and testing technology, but also to fundamental field work and mechanism of sedimentary process. During the golden age of the fast development of sedimentology, youth sedimentologists should not miss this rare opportunity to grow into the tower of strength of domestic sedimentology, and reach the word-class level as soon as possible in the future.d