论文部分内容阅读
为了探讨马克兰增生楔自生碳酸盐岩与水合物的关系,对2007年流星号的M74/3航次资料进行了总结。结果显示,自生碳酸盐岩与水合物并非一一对应的关系。对于甲烷通量很大的海区,海底和浅表层沉积物中通常没有自生碳酸盐岩,但是可以存在水合物。对于甲烷通量较高的海区,如果海底或浅表层沉积物中存在少量且小块的自生碳酸盐岩,通常沉积物中存在水合物;如果海底或浅表层沉积物中存在大量且大块的自生碳酸盐岩,通常浅表层沉积物中没有水合物,但就目前的资料,尚不能确定其深部是否存在水合物。对于甲烷通量很弱的海区,沉积地层表现为纹层状结构,通常既没有自生碳酸盐岩,也没有水合物。
In order to investigate the relationship between spontaneous carbonates and hydrates in the Markland accretionary wedge, the M74 / 3 voyage data of the 2007 meteorite were summarized. The results show that the authigenic carbonates and hydrates are not one to one correspondence. For sea areas with large methane fluxes, there is usually no authigenic carbonates in seabed and superficial sediments, but hydrates may be present. For areas with high methane fluxes, hydrates are usually present in sediments if small and small in-place carbonates are present in the seabed or superficial sediments; if large and large deposits are present in the seabed or superficial sediments Of the spontaneous carbonate rocks, usually with no hydrates in the superficial sediments, but as far as is available, it is not yet known if hydrates are present in deep parts. For the sea area with weak methane flux, the sedimentary strata show a laminar structure, usually with no authigenic carbonates and no hydrates.