中文摘要：

张夏组碳酸盐岩是龙门石窟主要造窟地层,水岩作用强烈.近年来酸雨进一步加剧了龙门石窟碳酸盐岩的 溶蚀.为了对龙门石窟的保护提供相关资料,需进一步探讨鲕粒灰岩的抗风化能力.为此,对东山石窟区所在张 夏组分层、取样,进行成分、微观结构分析,并通过室内酸雨溶蚀模拟实验来研究张夏组地层的溶蚀规律.研究表 明,龙门石窟张夏组各地层溶蚀差异较大,其单位面积溶蚀质量与钙镁比正相关;鲕粒灰岩风化后表面粗糙度与鲕 粒含量密切相关;研究区张夏组鲕粒成分主要为白云石,鲕粒灰岩的抗化学侵蚀能力比普通灰岩更强.通过对张 夏组地层岩性的分析及其溶蚀规律的研究,为龙门石窟的保护提供了基础科学资料.

英文摘要：

; The main parts of the Longmen Grottoes were hewn in carbonate rocks of the Zhangxia Formation （ Zhan-gxia Fm） ,in which water -rock interaction is intense. Acid rain has further aggravated the problem of dissolution of carbonate rocks over the years. Carbonate rocks were grouped and sampled,in order to analyze their compositions and microstructures and to study their dissolution in an erosion experiment simulating acid rain. This experiment has be done in order to determine the laws controlling dissolution of the carbonate rocks of Zhangxia Fm. Results of the simulation experiment show that the rates of dissolution are different for each layer of Zhangxia Fm. The dissolving quality per unit area correlated positively to the Ca / Mg molar ratio in the carbonate rocks. The surface roughnessof weathered oolitic limestone and ooides were closely related. Oolitic limestone is more resistant to chemical corro-sion than ordinary limestone in the area studied. The conclusion of this research could serve as a kind of basic in-formation for protection of the Longmen Grottoes.