Base- and precious-metal deposits in the Basin and Range of Southern California and Southern Nevada—Metallogenic implications of lead isotope studies

Church, Stanley E.; Cox, Dennis P.; Wooden, Joseph L.; Tingley, Joseph V.; Vaughn, R.B.

doi:10.1016/j.earscirev.2005.04.012

Cited by 8 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, sedex Pb-Zn and barite deposits are uncommon (Albers, 1983;Papke, 1984). In contrast, Cretaceous pluton-related replacement PbZn-Ag and skarn deposits are widespread in Cryogenian-Mississippian miogeoclinal rocks of southeastern California (Albers, 1983;Vikre, 2000;Church et al, 2005). The amount of transcurrent faulting in this zone makes it diffi cult to be specifi c about the facies and depositional setting of rocks that host the mineral deposits; however, it is signifi cant that the sedimentary and structural conditions were similar to those of other margin segments.…”

Section: Southeastern California and Southern Nevadamentioning

confidence: 74%

“…In southwestern and southern Nevada, MVT deposits are hosted in Mississippian platform carbonate rocks overlying a CryogenianDevonian shelf succession (Stewart, 1980;Vikre, 2001;Church et al, 2005). Along this miogeoclinal segment, the platform carbonate rocks display evidence for movement of basinal brines associated with formation of sedex and MVT deposits (Diehl et al, 2005).…”

Section: Southeastern California and Southern Nevadamentioning

confidence: 95%

See 1 more Smart Citation

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

2008

View full text Add to dashboard Cite

The U.S. and Canadian Cordilleran miogeocline evolved during several phases of Cryogenian-Devonian intracontinental rifting that formed the western margin of Laurentia. Recent fi eld and dating studies across central Idaho and northern Nevada result in identifi cation of two segments of the rift margin. Resulting interpretations of rift geometry in the northern U.S. Cordillera are compatible with interpretations of northweststriking asymmetric extensional segments subdivided by northeast-striking transform and transfer segments. The new interpretation permits integration of miogeoclinal segments along the length of the western North American Cordillera. For the U.S. Cordillera, miogeoclinal segments include the St. Mary-Moyie transform, eastern Washingtoneastern Idaho upper-plate margin, Snake River transfer, Nevada-Utah lower-plate margin, and Mina transfer. The rift is orthogonal to most older basement domains, but the location of the transform-transfer zones suggests control of them by basement domain boundaries. The zigzag geometry of reentrants and promontories along the rift is paralleled by salients and recesses in younger thrust belts and by segmentation of younger extensional domains. Likewise, transform-transfer zones localized subsequent transcurrent structures and igneous activity. Sediment-hosted mineral deposits trace the same zigzag geometry along the margin. Sedimentary exhalative (sedex) Zn-Pb-Ag ± Au and barite mineral deposits formed in continental-slope rocks during the Late Devonian-Mississippian and to a lesser degree, during the Cambrian-Early Ordovician. Such deposits formed during episodes of renewed extension along miogeoclinal segments. Carbonate-hosted Mississippi Valleytype (MVT) Zn-Pb deposits formed in structurally reactivated continental shelf rocks during the Late Devonian-Mississippian and Mesozoic due to reactivation of preexisting structures. The distribution and abundance of sedex and MVT deposits are controlled by the polarity and kinematics of the rift segment. Locally, discrete mineral belts parallel secondary structures such as rotated crustal blocks at depth that produced sedimentary subbasins and conduits for hydrothermal fl uids. Where the miogeocline was overprinted by Mesozoic and Cenozoic deformation and magmatism, igneous rock-related mineral deposits are common.

show abstract

Section: Southeastern California and Southern Nevadamentioning

confidence: 74%

Section: Southeastern California and Southern Nevadamentioning

confidence: 95%

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

2008

View full text Add to dashboard Cite

show abstract

“…Compaction was resisted in nodules and tubestones cemented by early diagenetic silica (Fraiser & Corsetti, 2003), as in other microfossiliferous Precambrian cherts (Knoll, 1985). The Noonday Formation was also locally affected by Mississippi Valley style lead-zinc mineralization from early Paleozoic migration of hydrothermal brines (Carlisle et al, 1954;Church et al, 2005). The Queen of Sheba Mine, 3 km southeast of the Galena Canyon outcrops examined for this study, is a replacement zone mainly of galena and chalcopyrite, 12 m thick and 123 m long, fed by faults and strata-concordant within a clearly defined sericitized and brecciated lower part of the Noonday Formation (Morton, 1965).…”

Section: Geological Backgroundmentioning

confidence: 99%

Early Ediacaran lichen from Death Valley, California, USA

Retallack

2022

JPS

View full text Add to dashboard Cite

Enigmatic tubestones from the basal Ediacaran Noonday Formation of southern California have been interpreted as fluid escape structures or as stromatolites in a “cap carbonate”, created by marine precipitation at the termination of Snowball Earth glaciation. However, doubts about this interpretation stem from permineralized organic structures within the tubes with hyphae and attached spheroidal cells, and thallus organization comparable with lichens. These “tubestones” are here named Ganarake scalaris gen. et sp. nov. The fungus was aseptate as in Mucoromycota and Glomeromycota, and the spheroidal photobiont has the size and isotopic composition of a chlorophyte alga. The tubes are most like modern window lichens (shallow subterranean lichens) and formed nabkhas (vegetation–stabilized dunes) of a loess plateau comparable in thickness and extent with the Chinese Loess Plateau of Gansu. Loess paleosols of three different kinds are recognized in the Noonday Formation from geochemical, petrographic, and granulometric data. The Noonday Formation was not a uniquely Neoproterozoic marine whiting event, but calcareous loess like the Peoria Loess of Illinois and the Chinese Loess Plateau of Gansu. सारांश दक्षिणी कैलिफोर्निया के निचले एडियाकरन नूनडे शैलसमूह से अज्ञात ट्यूबस्टोन की एक "कैप कार्बोनेट" में द्रव पलायन संरचनाओं या स्ट्रोमेटोलाइट्स के रूप में व्याख्या की गई है जो कि स्नोबॉल अर्थ हिमाच्छादन की समाप्ति पर समुद्री वर्षा द्वारा निर्मित हुए। हालांकि, इस व्याख्या के बारे में संदेह, हायफी और संलग्न गोलाकार कोशिकाओं के साथ ट्यूबों के भीतर अश्मीकृत कार्बनिक संरचनाओं से उपजा है और थैलस संगठन लाइकेन के साथ तुलनीय है। इन "ट्यूबस्टोन" को यहाँ गनारके स्केलेरिस नव कुल नव प्रजाति नाम दिया गया है। कवक म्योकोरोमाइकोटा और ग्लोमेरोमाइकोटा के समान अकोष्ठीय और गोलाकार फोटोबियोन्ट की माप और समस्थानिक संरचना क्लोरोफाइट शैवाल जैसी है। ट्यूब अधिकांशतः आधुनिक विंडो लाइकेन (उथले भूमिगत लाइकेन) की तरह हैं और लोएस पठार के नबखास (वनस्पति-स्थिर टीले) बनाते हैं जो कि मोटाई और विस्तार में गांसु के चीनी लोएस पठार के तुल्य हैं । भू-रासायनिक, पेट्रोग्राफिक और ग्रैनुलोमेट्रिक आलेखों से नूनडे शैलसमूह में तीन अलग-अलग प्रकार के लोएस पेलिओसॉल की पहचान की गई है। नूनडे शैलसमूह एक विशिष्ट नियोप्रोटीरोज़ोइक समुद्री श्वेत घटना नहीं था, लेकिन इलिनॉयस के पियोरिया लोएस और गांसु के चीनी लोएस पठार की तरह चूनामय लोएस था।

show abstract

Similarities between the Th/U map of the western US crystalline basement and the seismic properties of the underlying lithosphere

Bouchet

Blichert‐Toft

Reid

et al. 2014

Earth and Planetary Science Letters

View full text Add to dashboard Cite

Base- and precious-metal deposits in the Basin and Range of Southern California and Southern Nevada—Metallogenic implications of lead isotope studies

Cited by 8 publications

References 30 publications

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

Early Ediacaran lichen from Death Valley, California, USA

Similarities between the Th/U map of the western US crystalline basement and the seismic properties of the underlying lithosphere

Contact Info

Product

Resources

About