论漳州盆地的成因-是差异侵蚀盆地而非断陷盆地

Discussion on Genesis of the Zhangzhou Basin——a Diffrencially Erosioned Basin Rather Than a Fault-Depressed Basin

依据漳州盆地及其外围诸多小盆地之盆地边界大多数与在盆地占位的花岗闪长岩体边界一致,且沉积层薄,山足面大,盆周高度主要受酸性—中酸性火山岩或超浅成酸性岩体控制,并缺乏控制盆地形成之正断层的直接地质证据,进而依据岩性差异剥蚀率,论证了漳州盆地为差异侵蚀成因,而不是断陷盆地。对该类盆地成因类型的确定,对该地区地震监测有重要意义。

Writer found that the bottom boundaries of the Zhangzhou basin and more than 10 small basins nearby were mostly in accord with the boundary lines of the granodiorite occuping these basins,the sedimentary strata of these basins were very thin, the piedmont denudation surface were quite large; the higher landform around these basins were mainly acid, intermediate-acid volcanic rocks or ultra hypahyssial intrusive rocks,there were no direct geological evidenes of normal faults on the boundaries of these basins. So, further according to the different denudation rates of different rocks, it is considered that the Zhangzhou basin was formed by erosion and not belongs to the so-called tectono-fault basin. The ascertation of the genesis for this type of basins has an important significance for the seismic detection.