硅质岩沉积地球化学研究现状

Progress on Studying Sedimentary Geochemistry of Siliceous Rocks

硅质岩是造山带中分布最为广泛的岩石类型之一，硅质岩沉积环境的确定对深海沉积作用、大陆边缘地质学及大地构造格架的厘定具有重要意义。目前，在硅质岩沉积地球化学研究方面有以下主要进展：①硅质岩沉积地球化学研究；②与蛇绿岩有关的硅质岩沉积地球化学研究；③物质来源研究；④古氧化还原条件研究；

Siliceous rocks are a rock type so widely distributed in orogenic belt that the determination of its sedimentary environments is of important signicant to the study of deepsea deposition, continental margin geology and tectonic framework. At present, progress on studying sedimentary geochemistry of siliceous rocks may be mainly showed five aspects as follows: ①sedimentary geochemistry researching for modern ocean siliceous rocks; ②sedimentary geochemistry of siliceous rocks associated on the ophiolite; ③source areas of siliceous rocks; ④palao oxidiingreduction condition of siliceous rocks; ⑤discrimination of tectonic settings of siliceous rocks.