新元古代雪球事件與環(huán)境突變的研究進(jìn)展報(bào)告

沈延安

摘要：“雪球地球”事件是地球歷史上最極端的氣候事件，針對(duì)這一時(shí)期海洋氧化環(huán)境、極端氣候事件、以及生命演化過(guò)程進(jìn)行研究，深入探討它們之間的相互聯(lián)系和相互影響，是當(dāng)今地球科學(xué)最基礎(chǔ)和最前沿的領(lǐng)域。華南的新元古代地層連續(xù)、出露廣泛、化石豐富，并由碳酸鹽巖和細(xì)碎屑巖為主的沉積序列構(gòu)成，是解決這一時(shí)期全球年代地層和環(huán)境演化的關(guān)鍵地區(qū)。我們計(jì)劃運(yùn)用多硫同位素、Fe同位素和團(tuán)簇同位素等方法來(lái)研究這一事件。深入探討這一時(shí)期極端氣候變化、大氣和海洋環(huán)境轉(zhuǎn)化、以及生命演化之間的相互作用關(guān)系。

關(guān)鍵詞：新元古代；雪球事件；華南

Neoproterozoic “Snowball Earth” Events and Environmental Changes： A progress report

Abstract：Neoproterozoic “Snowball Earth” is one of the most extreme climatic changes over geological history. To understand redox chemistry evolution， abrupt climatic changes， and their interaction with life evolution is a fundamental and cutting edge question in geosciences. In South China， continuous deposition of the Neoproterozoic carbonates and siliciclastic rocks rich in fossil record were preserved， and therefore it is a key area to study Neoproterozoic environmental evolution. We will apply multiple S-isotope， Fe isotope and clumped isotope to study Neoproterozoic climatic changes， evolution of ocean and atmospheric chemistry and their influences on life evolution.

Keywords：Neoproterozoic；snowball-Earth；south China

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