论冰川与泥石流堆积体的宏观展布、磨光面、平行擦痕等遗迹的差异性——兼答王乃昂教授“蒙山‘冰川遗迹’辨识中的逻辑谬误分析”  

Discussion on the differences of macroscopic distribution,polished surface,parallel scratches and other remains between glacier and debris flow accumulation——A response to Prof.WANG Nai'ang et al.“The logical fallacies on identification of the‘glacial relics’in Mengshan Mountain”

作　　者：王照波[1,2,3,4] 田晓明 赵向阳 李宝杰 WANG Zhaobo;TIAN Xiaoming;ZHAO Xiangyang;LI Baojie(Key Laboratory of Gold Mineralization Process and Resource Utilization of the Ministry of Land and Resources,Jinan,250013;Management Office of the Yimeng National Geological Park,Linyi,Shandong,273304;Pingyi Bureau of Natural Resources and Planning,Pingyi,Shandong,273304;Shandong Compass Mineral Exploration Co.,Ltd,Linyi,Shandong,276006)

机构地区：[1]国土资源部金矿成矿过程与资源利用重点实验室,济南250013 [2]沂蒙山世界地质公园管理局,山东临沂273304 [3]平邑县自然资源和规划局,山东平邑273304 [4]山东指南针矿产勘查有限公司,山东临沂276006

出　　处：《地质论评》2020年第6期1589-1600,共12页Geological Review

基　　金：自然资源部金矿成矿过程与资源利用重点实验室开放课题“山东金伯利的侵位年代研究”(编号:201403);山东指南针矿产勘查有限公司“东亚冷槽追索计划”(编号:20180101)联合资助。

摘　　要：本文在对比分析了冰川堆积与泥石流堆积过程差异的基础上,发现两类堆积体在平面与剖面上都存在明确的专属性差别。冰川冰碛在平面上形成专属性的垄槽序列,剖面上显示为混杂状无层理堆积特征。泥石流形成堆积扇,扇面上呈放射状垄岗堆积,剖面上表现为阵次韵律序列。据此对蒙山拦马墙冰碛垄、瑶池冰碛垄进行了调查研究与分析,认为拦马墙冰碛垄属于冰川凹岸堆积,瑶池冰碛垄属于冰川对称堆积。此外经调查发现,王乃昂等(2020)《逻辑》一文图2d所示"泥石流底泥层"实为一蜂类废弃的泥质巢穴。"平行特征"擦痕为泥石流成因的解释属于《逻辑》一文对于引文的误读。综合研究认为,蒙山冰川遗迹无论从清荣古冰斗的外形特征、平坦指数(F=1.87),瑶池、拦马冰碛垄的平面展布特征、砾石垄的堆积特征、兰溪U谷特征及深宽比(0.24~0.27),U谷岩壁上"微小擦痕"构成的磨光面及磨光面上产出的"平行特征"的擦痕等,都显示拦马墙冰碛垄与兰溪U谷为冰川作用的结果。This study finds that there are definitely unique differences in plane and profile between the glacier and debris flow accumulation bodies based on a comparative analysis of their accumulation process.The glacial moraine formed aunique ridge—groove sequence in plane,and the features of section were mixed and without beddings.However,the debris flow formed a radial ridge—groove deposition fan and showed rhythmic sequences in the profile.Based on the investigation of Lanmaqiang and Yaochi moraine ridges in Mengshan Mountains,the Lanmaqiang moraine ridge belonged to the glacial concave bank accumulation,whereas the Yaochi moraine ridge was glacial symmetrical accumulation.In addition,the"debris flow bottom mud layer"shown in figure 2 d of the paper(Wang Nai’ang et al.,2020&)is actually a discarded honeycomb built by mud bees,and the"parallel feature"scratch caused by debris flow is a misunderstanding about the quotation.Through comprehensive study,the Lanmaqiang moraine ridge and the Lanxi U-shaped valley are formed by glaciation on the basis of the appearance features of Qingrong ancient cirque,the flat index(F=1.87),the plane distribution of the Yaochi and Lanmaqiang ridge,the accumulation characteristics of gravel ridges,the Lanxi U-shaped valley characteristics and the ratio of depth to width(0.24~0.27),the polished surfaces on the wallrock of the U-shaped valley consisting of"tiny scratch"and"parallel feature"scratches,etc.

关 键 词：冰川堆积 泥石流堆积 磨光面 擦痕 全新世 蒙山 

分 类 号：P642.23[天文地球—工程地质学] P343.6[天文地球—地质矿产勘探]