槽区岩相古地理与板块沉积学

SEDIMENTARY FACIES AND PALAEOGEOGRAPHY OF GEOSYNCLINAL AREAS AND PLATE-TECTONIC SEDIMENTOLOGY

摘要:

槽区岩相古地理是大陆边缘地质中一项有待探索的综合研究领域,也是“八五”期间岩相古地理工作面临的新课题。由于槽区的自身特征决定了我们不能直接将台区岩相古地理工作的理论、实践和编图方法移植到槽区岩相古地理的研究中,因此,必须从槽区沉积地质特征探索其岩相古地理工作的理论与方法。下面是笔者等近年来在新疆北部泥盆纪活动大陆边缘进行槽区岩相古地理工作的点滴体会,意在抛砖引玉。

Abstract:

Exemplified by the Devonian strata in northern Xinjiang, the present paper discusses the characteristics of sedimentary facies and palaeogeography of geosynclinal areas according to the strati-graphic, sedimentary, palaeontological and structural characteristics and sedimentary facies and palaeogeographic mapping. The theory and method of plate-tectonic sedimentology are thought to be a useful tool for the study of sedimentary facies and palaeogeography. Plate-tectonic sedimentology comprises plate tectonics, sedimentology and stratigraphy. Based on the regional stratigraphic analysis and backed by the global changes, it focuses mainly on geological characteristics, formation, development and evolution of the continental margin deposits by means of integrating exegenic processes with endogenic volcanism, intraplate processes with periplate processes and event sedimentation with normal sedimentation. Its philosophical thought is that the present is the key to the past, and that the past is the key to the past and that the past is the key to the present as well as that the celestial body is the key to the earth, and that the earth is the key to the celestial body. Its technical line is regional stratigraphic analysis→sedimentary dynamic analysis→facies dynamic analysis→sequence stratigraphic analysis→palaeogeographic analysis.