Tectonic Uplift Destabilizes Subsea Gas Hydrate: A Model Example From Hikurangi Margin, New Zealand

被引：35

作者：

Burton, Zachary F. M. ^{[1
,2
]}

Kroeger, Karsten F. ^{[3
]}

Scheirer, Allegra Hosford ^{[1
]}

Seol, Yongkoo ^{[2
]}

Burgreen-Chan, Blair ^{[4
]}

Graham, Stephan A. ^{[1
]}

机构：

[1] Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA

[2] US DOE, Natl Energy Technol Lab, Morgantown, WV 26505 USA

[3] GNS Sci, Lower Hutt, New Zealand

[4] Conoco Phillips, Houston, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2020年 / 47卷 / 07期

关键词：

BOTTOM-SIMULATING REFLECTORS; CONDUCTIVE HEAT-FLOW; METHANE HYDRATE; EAST-COAST; MASSIVE DISSOCIATION; PLATE CONVERGENCE; FLUID-FLOW; SEA-BED; CARBON; EVOLUTION;

D O I：

10.1029/2020GL087150

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Rising ocean temperatures and falling sea level are commonly cited as mechanisms of marine gas hydrate destabilization. More recently, uplift-both isostatic and tectonic-has been invoked. However, the effect of tectonic shortening and uplift on gas hydrate stability zone extent has not been validated via integrated computational modeling. Here, modeling along the Hikurangi margin of New Zealand illustrates the mechanism of tectonic uplift as a driver of gas hydrate destabilization. We simulate how tectonic uplift and shortening affect the presence and decrease the extent of a gas hydrate stability zone. We suggest that resultant gas hydrate destabilization in the marine realm may impact the global carbon cycle and oceanic chemistry over geologic time.

引用

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