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龙门山一小金河断裂带以西,属于松潘—甘孜地槽褶皱系的川西地区,古生物混生现象十分普遍,长期以来,给地层对比及地质历史的解释带来很大的混乱。近年,随着板块学说的传播,一些学者,用板块活动的机制对此加以解释,归因于混杂岩,进而视混杂岩为板块缝合线的一种等同物。这种混杂岩,在川西地区分布特别广泛,吸引着广大地质工作者的兴趣。1979年,张之孟、金蒙率先报导了金沙江边乡城、得荣地区的混杂岩,并将其划分为蛇绿混杂岩和泥砾混杂岩两类;最近,又有郝子文和李小壮等的文章问世。有关混杂岩的资料益丰,观察日深,但对混杂岩的解说与涵义,却有不同的理解。笔者检视了有关资料后认为,所谓混杂岩,并非一般含义上的岩石实体,而是一种特
To the west of the Longmenshan-Xiaojinhe fault zone, belongs to the western Sichuan basin of the Songpan-Garzê Gully fold system. Paleontological bioconjugation is widespread. For a long time, it has brought great confusion to stratigraphic correlation and interpretation of geological history. In recent years, with the spread of plate theory, some scholars have used the mechanism of plate activity to explain this. They are attributed to the melanges and then the mélanges as an equivalent of plate sutures. This kind of melange has been widely distributed in western Sichuan and has attracted the interest of the majority of geological workers. In 1979, Zhang Zhimeng and Jin Meng took the lead in reporting the melanges in the township of Xiangtan in the Jinsha River and in the De Rong area, and classifying them into ophiolitic mélanges and boulder mélanges. Recently, there were articles by Hao Ziwen and Li Xiao Zhuang come out. The information on melanges YICON, observed deep, but the commentary and meaning of melange have different understandings. After examining the relevant information, the author thinks that the so-called melange is not a rock entity in the general sense but a special