Chapter 19: Structural unroofing of the central Panamint Mountains, Death Valley region, southeastern California

Kip Hodges, L. W. McKenna, M. B. Harding

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Greenschist and amphibolite facies metamorphic rocks within the core of the Panamint Mountains of southeastern California were brought to the surface largely by movement on diachronous systems of west-dipping normal faults. Much of the unroofing can be attributed to displacement along the low-angle Harrisburg detachment, which placed weakly to unmetamorphosed upper Precambrian-Paleozoic strata on upper Precambrian metasedimentary rocks in Miocene time, prior to 10.6 ± 0.9 Ma intrusion of the Little Chief quartz monzonite porphyry. The Eastern Panamint normal fault system (late Miocene) initiated at a moderate angle (40 to 60°), juxtaposing amphibolite facies(?) Precambrian crystalline basement and upper Precambrian-Paleozoic sedimentary rocks. Range-scale anticlinal folding of the Harrisburg detachment and eastward tilting of the Eastern Panamint fault system are attributed to reverse-drag flexure induced by movement on the west-dipping Amargosa fault system (late Miocene?), which is exposed in the Black Mountains to the east of Death Valley and is inferred to dip beneath the Panamint Mountains. The low-angle Emigrant detachment (late Miocene to early Pliocene) incised the Harrisburg footwall and acted as the growth fault for the Neogene Nova Basin, which is dominated by material eroded from the metamorphic core.

Original languageEnglish (US)
Pages (from-to)377-390
Number of pages14
JournalMemoir of the Geological Society of America
Volume176
Issue number1
DOIs
StatePublished - 1990
Externally publishedYes

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unroofing
Precambrian
Miocene
valley
mountain
amphibolite facies
normal fault
Paleozoic
growth fault
monzonite
flexure
metasedimentary rock
greenschist facies
footwall
porphyry
metamorphic rock
drag
Neogene
folding
sedimentary rock

ASJC Scopus subject areas

  • Geology

Cite this

Chapter 19 : Structural unroofing of the central Panamint Mountains, Death Valley region, southeastern California. / Hodges, Kip; McKenna, L. W.; Harding, M. B.

In: Memoir of the Geological Society of America, Vol. 176, No. 1, 1990, p. 377-390.

Research output: Contribution to journalArticle

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