發(fā)布時(shí)間：2018-02-14 22:53

  本文關(guān)鍵詞： 回波強(qiáng)度 富鈷結(jié)殼 潛魚海山 底質(zhì)類型 海洋地質(zhì) 地球物理　出處：《地球科學(xué)》2016年04期 　論文類型：期刊論文

【摘要】：中、西太平洋海山區(qū)是富鈷結(jié)殼的重要富集區(qū),鈣質(zhì)遠(yuǎn)洋沉積、碳酸鹽巖沉積及重力作用引起的滑塌沉積是海山山頂和斜坡的主要沉積類型,它們的空間分布規(guī)律對于富鈷結(jié)殼的分布至關(guān)重要.在國內(nèi)首次利用EM122多波束回波強(qiáng)度資料對中太平洋潛魚海山進(jìn)行了底質(zhì)類型研究,對回波強(qiáng)度資料進(jìn)行處理和統(tǒng)計(jì)分類,并與淺地層剖面和地質(zhì)取樣結(jié)果對比,分析得出了4種底質(zhì)類型,即富鈷結(jié)殼、鈣質(zhì)遠(yuǎn)洋沉積、碳酸鹽巖基底及碎屑流沉積.這幾種底質(zhì)類型具有不同的回波強(qiáng)度特征,其中富鈷結(jié)殼區(qū)表現(xiàn)為均一的回波強(qiáng)度高值特征;鈣質(zhì)遠(yuǎn)洋沉積區(qū)表現(xiàn)為均一的回波強(qiáng)度低值特征,二者回波強(qiáng)度值相差約20dB.結(jié)果顯示潛魚海山山頂僅局部發(fā)育鈣質(zhì)遠(yuǎn)洋沉積,大部分為碳酸鹽巖基底出露區(qū),山頂邊緣及側(cè)翼山脊處為主要的富鈷結(jié)殼分布區(qū).此外,該海山存在3處較大規(guī)模的重力滑塌沉積區(qū),主要為碎屑流沉積.
[Abstract]:In the West Pacific seamounts area is an important area of cobalt rich crusts, calcareous pelagic carbonate deposits and gravity induced slump deposits are mainly sedimentary seamounts hill and slope type, spatial distribution of their distribution is crucial for cobalt rich crust. The use of EM122 multi beam echo intensity data of the Pacific submarine the fish were seamount sediment type research in China for the first time, processing and statistical classification of echo intensity data, and compared with the shallow profile and geological sampling results, analysis of the 4 sediment types, namely cobalt rich crusts, calcareous pelagic carbonate sedimentary basement and clastic flow. These types of sediment with the different characteristics of the echo intensity, the performance of the cobalt rich crust area as the echo intensity uniform high value performance characteristics; calcareous pelagic sedimentary area is homogeneous low echo intensity values, the two back The difference between the value of wave intensity about 20dB. showed that Carapidae seamount summit only partially calcareous pelagic sediments, mostly carbonate basement outcrop area, the top edge and flanking ridges for cobalt rich crusts mosthybridization. In addition, the existing 3 seamounts large-scale gravitational sliding deposition area, mainly for debris flow deposits.

【作者單位】： 廣州海洋地質(zhì)調(diào)查局國土資源部海底礦產(chǎn)資源重點(diǎn)實(shí)驗(yàn)室;
【基金】：國土資源部海底礦產(chǎn)資源重點(diǎn)實(shí)驗(yàn)室基金課題(No.KLMMR-2013-A-03) 國際海域資源調(diào)查與開發(fā)“十二五”專項(xiàng)課題(Nos.DY125-13-R-01,DY125-13-R-08,DY125-13-R-05,DY125-14-R-01)
【分類號(hào)】：P744
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本文編號(hào)：1511816