三江褶皱系上三叠统的类型及对比

SEDIMENTARY TYPES AND STRATIGRAPHICAL CORRELATION OF THE UPPER TRIASSIC OF THE SANJIANG FOLD SYSTEM

摘要: 三江褶皱系是中三叠世末主印支褶皱幕形成的一个早期印支褶皱系。由于产生了极其复杂的造山带结构,覆盖在该褶皱系之上的上三叠统就具有同样复杂的沉积性质。本文从剖面结构、岩石组合、生物化石、接触关系等几个方面对上三叠统进行了沉积类型划分和对比。

Abstract: The Sanjiang fold system is an Early Indosinian fold system formed in the principal Indosinian fold phase at the end of the Middle Triassic. Owing to the complex structure of the orogenic belt, its overlying Upper Triassic likewise has complex sedimentary features. In order to compile a geological map of the region where the Sanjiang fold system is distributed, study the Upper Triassic lithofacies and formations, sedimentology and paleogeography and predict the prospects of stratabound deposits, the author puts some ideas about the sedimentary types and stratigraphical correlation of the Upper Triassic from such respects as the structure of the section, rock associations, fossils and contact relationships.

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