Friday blog post – Arctic Volcanism

This summer 15 students participated in our “Arctic tectonics, volcanism and climate” course hosted by UNIS at Svalbard and arranged by NOR-R-AM and DEEP. As part of their assessment the students wrote a blog post in groups. Each Friday, in the five weeks to come, we will post one blog for you to read and enjoy.

Arctic Volcanism

by Thomas Birchall (UNIS), Paul Heckmann (UiT), Cheng-Cheng Wang (UiB).

Three major magmatic events: the Sibirian Traps, the High Arctic Large Igneous Province (HALIP) and the North Atlantic Igneous Province (NAIP) in the Arctic region are introduced in the following. These events are classified as large igneous provinces (LIBs), periods during Earth’s history when large volumes of magma (> 0.1 million km3) have been produced and erupted over a wide area in a relative short period of time (c. 1-5 Myr), driving by large mantle-derived thermal and material fluxes into the shallow crust, independent of regional plate tectonics prior to emplacement (Coffin & Eldholm, 1994; Svensen, et al., 2009). The LIBs presented here are mainly discussed in terms of their timing, composition, geochemistry, origin and formation as well as climatic related impacts. This essay also includes studies based on outcrops in Svalbard, where evidences of numerous Arctic volcanic events and their effects can be traced and correlated (Fig. 1).

Fig. 1 Localities of main igneous provinces classified as part of the HALIP ( from (Senger, et al., 2014), IBCAO v3 dataset by (Jakobsson, et al., 2012), Extent of magmatic provinces based on (Tegner, et al., 2011), (Shipilov & Karyakin, 2011), and (Nejbert, et al., 2011).

The rest of the blog is available at NOR-R-AMs web pages.

Published Oct. 5, 2018 1:13 PM - Last modified Oct. 5, 2018 1:37 PM