LARGE IGNEOUS PROVINCES;
SKAERGAARD LIQUID LINE;
EAST GREENLAND;
STILLWATER COMPLEX;
VOLCANIC COMPLEX;
CENTRAL ANDES;
EMPLACEMENT;
INTRUSION;
CRYSTALLIZATION;
PLUTON;
D O I:
10.1126/sciadv.abq0394
中图分类号:
O [数理科学和化学];
P [天文学、地球科学];
Q [生物科学];
N [自然科学总论];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
The vertical growth rate of basaltic magma chambers remains largely unknown with available estimates being highly uncertain. Here, we propose a novel approach to address this issue using the classical Skaergaard intrusion that started crystallizing from all margins inward only after it had been completely filled with magma. Our numerical simulations indicate that to keep the growing Skaergaard magma chamber completely molten, the vertical growth rate must have been on the order of several hundreds to a few thousands of meters per year, corresponding to volumetric flow rates of tens to hundreds of cubic kilometers per year. These rates are several orders of magnitude higher than current estimates and were likely achieved by rapid subsidence of the floor rocks along faults. We propose that the Skaergaard is a plutonic equivalent of supereruptions or intrusions that grow via catastrophically rapid magma emplacement into the crust, producing totally molten magma chambers in a matter of a few months to dozens of years.
机构:
Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USAUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
Barboni, Melanie
Annen, Catherine
论文数: 0引用数: 0
h-index: 0
机构:
Univ Bristol, Sch Earth Sci, Bristol BS8 1TH, Avon, EnglandUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
Annen, Catherine
Schoene, Blair
论文数: 0引用数: 0
h-index: 0
机构:
Princeton Univ, Dept Geosci, Princeton, NJ 08544 USAUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
机构:
Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USAUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
Barboni, Melanie
Annen, Catherine
论文数: 0引用数: 0
h-index: 0
机构:
Univ Bristol, Sch Earth Sci, Bristol BS8 1TH, Avon, EnglandUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
Annen, Catherine
Schoene, Blair
论文数: 0引用数: 0
h-index: 0
机构:
Princeton Univ, Dept Geosci, Princeton, NJ 08544 USAUniv Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA