Mineralization is predominantly controlled by the northwest trending shallow angle Copperstone fault and shear zone. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980's. Found inside – Page 3-4A complex geologic setting exists within the area as evidenced by detachment fault features identified at the Picacho Mine and American Girl Mine and ... Found inside – Page 39The Copperstone Mine ( fig . SR2 ) has developed a gold deposit distributed along a high - angle upper - plate fault created during the era of detachment ... Secret Pass Au Project, AZ. ±. The claims are 100% owned by IMC International Mining Corp. Xiaoqinling District is an important gold-producing area in China. Reclamation work began in 1997. 2a), is situated in the central part of the Linglong detachment fault that defines the eastern edge of the Linglong MCC. Found inside – Page 1Copper - gold deposits associated with detachment faults typically lie along or within a few tens of meters of the faults ; a few , however , are hundreds of meters above the faults . Detachment - fault deposits contain fractures and thick , irregular ... Of primary interest is the "Oatman Southern Gold Mine", which has potential as a possible large low-grade detachment fault gold deposit. The Detachment Fault System on a regional scale is known to be associated with various ore deposits. gold mineralization occurs within and below a low-angle fault zone in cataclastically deformed precambrian metamorphic rocks. The Jiaodong gold deposits are characterized by multi-type paragenesis, as in the case of the Linglong deposit, where three types of gold deposits occur: altered rock type in the fault zone, sulfide quartz vein type and quartz vein type (S.X. Total production from 1991 to 1996 was 360,000 oz of gold. Ada Tepe is a typical low-sulfidation epithermal gold deposit, unusual in that it is older than adjacent magmatic-related deposits and is hosted in Maastrichtian–Paleocene sedimentary rocks above a detachment fault contact with underlying Paleozoic metamorphic rocks. The property has a regional setting typical of detachment fault gold deposits and has geological, mining and metallurgical similarities to the Mesquite Mine in California. Location map of major detachment faults and detachment-fault-related mineral deposits in Arizona, southeastern California, and southernmost Nevada 53 36. ]: Geological Society of America Abstracts with Programs, v. 16, no. Found insideDetachment. Faults. In recent years, considerable exploration activity has been focused on a previously unrecognized class of disseminated gold deposit that ... Iron was produced from the Phoenix and Yuma mine groups that are located in the northwest of the Plomosa mining area in 1917. These deposits sometimes contain economic concentrations of gold and silver. two types of mineralization: gold-bearing quartz beins of cretaceous age related to the cret granite and mid-miocene mineralization in the upper plate of a detachment zone. Detachment-fault deposits contain fractures and thick, irregu- lar zones that are commonly filled with the Detachment fault Last updated December 24, 2020 View of Doso Doyabi, Snake Range, Nevada, which was formed by detachment faulting.. Detachment faulting is associated with large-scale extensional tectonics.Detachment faults often have very large displacements (tens of km) and juxtapose unmetamorphosed hanging walls against medium to high-grade metamorphic footwalls that are called … Li et al., 2007). and Welty, 1986). Contact: Tel: 1 (604) 588-2110. composed of highly fractured, iron-stained, and bleached trachytic andesite, which is typical . The deposit is a breccia-hosted gold deposit controlled by a detachment fault separating Tertiary age volcanic rocks from Precambrian granite. These are flanked by Oligo-Miocene extensional volcano- sedimentary basins internally deformed by domino-style -NE trending hanging wall extensional faults. These unusual gold deposits are mostly overlooked, and they appear to be abundant! composed of highly fractured, iron-stained, and bleached trachytic andesite, which is typical . The domes consist of a core of medium to high-grade crystalline metamorphic rocks (eclogite, mafic granulite and migmatite) surrounded by a layered outer zone, between 1 and 2 km thick, composed of amphibolite facies gneisses and mylonitic gneiss, which in turn is separated from over-thrust (obducted) sub-seafloor mantle rocks by a shallow-dipping (30° - 40°) zone of decollement known as the … Found inside – Page 3-6The detachment faults juxtapose Precambrian ( greater than 570 million years old ) rocks of three different ages ( Upper , Middle and Lower Proterozoic ) . The N200 t Au Xiadian gold deposit, which is located 15 km to the southwest of the Dayingezhuang deposit (Fig. Gold mineralization is located in: (1) a massive, tabular ore body above the detachment fault; and (2) open spacefilling ores along predominantly east–west oriented listric faults. Extensive exploration in the region by Fischer-Watt Mining Co. resulted in our acquisition of these data sets, made available for this study by La Cuesta International, Inc., who currently hold the rights to this data collection. The project was turned down as Gulf was of the opinion that the project was not big enough. higher grade gold values in the deposit are closely associated with silicification and quartz-sericite-pyrite alteration. Gold Deposit, Jiaodong Peninsula Peng CHAI, Zeng-qian HOU and Zhi-yu ZHANG 1Institute of Geology, Chinese Academy of Geological Science, Beijing, China Abstract The Xiadan gold deposit from Jiaodong Peninsula contains more than 200 t of gold, and is one of the representative largest deposits within south part of the Zhaoping Fault zone. Found inside – Page 71The gold is either disseminated or in ( 2 ) Ni , Mg , Cr , Co , Mn , and Fe ... Hg , W , Zn , detachment fault - related gold deposits , such as at and Te . Mineralization consists of wide fault breccia in the Stampede Detachment Fault and an associated lateral ramp. Discovered 1915. Copper-gold deposits associated with detachment faults typically lie along or within a few tens of meters of the faults; a few, however, are hundreds of meters above the faults. The older controlling feature in the Plomosa Mining District are the detachment faults. Found inside – Page 3The northeastern Dome Rock Mountains were selected for detailed studies based on several characteristics favorable to detachment - fault - related gold ... These unusual gold deposits are mostly overlooked, and they appear to be abundant! We believe the Rawhide and Buckskin Mountains detachment fault area has the potential for the development of several multi-million ounce gold equivalent deposits. Silver was also produced at the mine, but silver production was only half that of gold. Found inside – Page 33Fall 1998 Field Trip Guidebook Shallow Expressions of Deep , High - Grade Gold Deposits 40 . ... dextral strike - slip faults ; east - northeast - striking , sinistral strike - slip faults ; normal faults ; and low - angle detachment faults ( Stewart , 1988 ... Gulf Mineral Resources initiated the gold rush at the Mockingbird District in 1982. Aguila American Gold Limited is pleased to announce it has acquired 100% ownership through staking, the Cora copper project, located in Pinal County, Arizona. The N200 t Au Xiadian gold deposit, which is located 15 km to the southwest of the Dayingezhuang deposit (Fig. Comment (Production): Modern mining of the deposit by Battle Mountain Gold Company began in 1991 and ended in early 1997. The Larus project contains a sediment-hosted (Carlin-type) gold system along the Cortez gold belt in central Nevada. New 40Ar/39Ar geochronology on hydrothermal sericite and muscovite from the Dayingezhuang deposit indicate the gold event is related to evolution of the core complex at 130 ± 4 Ma and is the earliest important gold event that is well-documented in the province. Found inside – Page 172Ore was hosted in a detachment fault zone from which was mined approximately 12 million tons of ore with a gold concentration of 1.4 ppm, or 0.040 ounces of ... The NNE-trending Linglong Metamorphic Core Complex hosts the majority of the gold deposits in the Jiaodong Peninsula of eastern China. and (4) probable Miocene age. According to the published data it is controlled by the regional Tokachka detachment fault, which is a part of complex mylonitic shear zone, detaching the core of Kessebir gneiss dome from its mantle. the alteration associated with gold deposits spatially related to detachment faults. 40 Ar/ 39 Ar adularia dating from the Ada Tepe deposit indicates that the … Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980’s. It is best known for gold deposits, but may also carry a variety of other metals including copper, silver, lead, barium, zinc, and manganese. The detachment fault type of deposit was first recognized in the 1980’s with the discovery of the Copperstone gold deposit, from which Cyprus Minerals mined 500,000 ounces of gold by open pit. At the request of the Bureau of Land Management and under authority of the Federal Land Policy and Management Act of 1976, the Bureau of Mines conducted a mineral survey in February 1988 to appraise the mineral resources of 16,430 acres of ... deposit: this is one of the oldest and most productive mines in the gold basin district. Geologic structures around the Ada Tepe deposit and adjacent prospects can generally be modeled by domino-style rotational normal faulting in the upper plate above the detachment fault (Márton et al., 2006). A gold rush was initiated at Mockingbird Trend during the 1980's, with some 15,000 ounces of high-grade ore harvested. The deposit provides excellent exposures of the hangingwall, footwall, and detachment itself, marked by mylonitic to ultramylonitic, cataclastic and … of . Clara Moro, Silverfield Gold: Gold deposit in detachment fault environment. One of several gold-silver bearing detachment faults in Arizona. This was the working hypothesis of Anaconda and, later, Chevron. two types of mineralization: gold-bearing quartz beins of cretaceous age related to the cret granite and mid-miocene mineralization in the upper plate of a detachment zone. Gold mineralization at Copperstone occurs principally within the moderate to low-angle Copperstone Fault which has been interpreted to be a listric fault associated with the underlying Moon Mountain detachment fault. Gold occurs as native flakes within fault breccia, gouge and shear zones related to the faulting. The Copperstone gold deposit is related to the Moon Mountain or Copper Peak detachment fault. Today there is an estimated deposit of at least 250,000 tons of.05 to 0.1 oz / T gold. Frisco Gold Corp’s Frisco Project is located in the Black Mountains, the most prolific gold producing range in Arizona. The > 200 t Au Xiadian gold deposit, which is located 15 km to the southwest of the Dayingezhuang deposit (Fig. The upper plate gneisses and granites host important gold deposits in several locales in the Cargo Muchacho and Chocolate Mountains. Enclosed within this pack is an article by noted Arizona geologist Joe Wilkins Sr., which describes the leading theory about how they formed. The project was turned down as Gulf was of the opinion that the project was not big enough. A low-angle structure called the Fluorspar Canyon Detachment separates mineralized volcanic rocks in the hanging wall from unmineralized Paleozoic sedimentary rocks in the footwall of the fault and is thought to be part of a large-scale fault bounding the base of a regional allochthonous terrane. Found inside – Page 118... Deposits Genesis of Abitibi Gold Deposits Genesis of Volcanogenic Massive Deposits Moroccan Base Metal Deposits ... Gold and Silver Deposits in Mexico 1994-95 Bruce A. Bouley Metamorphic Core Complexes , Detachment Faults ... of . Two charac­ teristics of the Copperstone deposit, how­ ever, differ from those of other detachment­ fault deposits: abundanceofquartz-amethyst veins andabundanceof gold. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980's. Three generations of extensional faulting and associated tilting affected mid-Tertiary mineralization of the Mammoth vein set and the newly described Shultz Spring altered area. These are known as the Gold Basin placers. The best example of an Arizona detachment gold deposit is Copperstone, which, like Mockingbird is in the highly extended Western Arizona terrain near … Graph showing gold grades of laterite-saprolite Au deposits 51 35. gold deposit, called a "detachment fault" deposit. Found inside – Page 93Although two determinations of trend of the trace of the detachment fault . ... OCCURRENCES 93 Veins along the Miocene detachment fault Placer gold deposits. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980's. Fluid-inclusion analyses from these deposits indicate derivation from saline fluids at moderate temperature, as identified in previous studies. Anaconda, who acquired the Mockingbird Mine Project, focused exploration on the area east of the historic Mockingbird and Great West mines, and lying beneath the surface trace of the Mockingbird detachment fault. Note that this one, like many others in the state, has a mine adit dug in the footwall for gold. The mineralisation model developed for Wapolu is that the gold is associated with hydrothermal fluids, concentrated in shallow-dipping deposits within or immediately adjacent to a detachment fault zone (DFZ) developed along a contact between a domed metamorphic basement and an overlying ultramafic unit. Found inside – Page 148Take the left fork to the Picacho mine detachment fault ( Figures 6 , 7 ) ... gneiss sit above the microbreccia , which has anomalous gold and arsenic ... The gold deposit originated from processes common to detachment faults as described in Spencer and others (1988) p. 2. The fault-localized feeders, which are inferred originally to have underlain the high sulfidation deposits, were detached from them by the low-angle faults.All ore exploited from the high sulfidation deposits underwent supergene sulfide oxidation during weathering, which commenced after detachment faulting had ceased and was ongoing at 10 Ma. The deposit provides excellent exposures of the hangingwall, footwall, and detachment itself, marked by mylonitic Remote sensing data and image-processing/visualization techniques can be successfully applied to mineral exploration if geologic synthesis is combined with image interpretation. These authors believe that most evidence at the Copper­ stone deposit supports a relationship Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980’s. Learn More. The 377-page book describes gold deposits, ... Then there are the detachment fault gold deposits that extend across Arizona from the northwest to the northeast. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980's. These large porphyries also contained several other base metals along with some gold and silver. Accompanying CD-ROM titled: Supplementary materials to Miocene tectonics of the Lake Mead region, central basin and range. Found inside – Page 93Although two determinations of trend of the trace of the detachment fault . ... yields an age of 72 Ma . faces elsewhere are reported to contain gold ore . The ores are zones of intensive silicification and brecciation synchronous with detachment faulting. 2a), is situated in the central part of the Linglong detachment fault that defines the eastern edge of the Linglong MCC. It is likely that the fluids depositing both assemblages were derived from the same source, probably graben-related basins formed by the same extensional tectonics as were the detachment faults. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980's. This style of mineralization is prevalent in the Oatman Gold District. detachment fault system, parallel to the crest of the range, indicates that movement on the Bullard fault in the Bullard district was primarily horizontal, with upper-plate rocks to the southeast moving northeast ... potential exists for a major gold deposit in the area of the Bullard district. Notably, several gold deposits that have considerable potential that has been mostly ignored are the Detachment Fault deposits all across Arizona and described by Hausel (2019, 2020). Anaconda estimated a deposit of at least 10 million tons of.05 to 0.1 oz / T gold. Found inside – Page B-25detachment surface as well as in rocks well above the fault plane . Therefore , undiscovered copper - iron deposits containing small amounts of gold could ... The lack of reported specular hematite associated with mineralization is inconsistent with a detachment fault model as this is a very common accessory mineral in detachment fault hosted deposits in Arizona and Nevada; The local presence of Laramide aged intrusions, which are associated with all major porphyry copper deposits in Arizona; and 2a), is situated in the central part of the Linglong detachment fault that defines the eastern edge of the Linglong MCC. Source: USGS Keith R Long Preliminary descriptive deposit model for detachment fault related model 10 DETACHMENT FAULT SYSTEM - SCALE POTENTIAL. deposit: detachment fault related deposit. Although base and precious metals have been sought after for centuries, there has been a considerable increase in exploration for gold and copper in recent years as the prices have It ranks second to Jiaodong with regard to gold deposits. Deposits are often brecciated or deformed by movement along or above the detachment fault. Chlorite-epidote-calcite alteration occurs along and below the detachment fault. These altered zones sometimes contain base-metal sulfides and barite. Silver was also produced at the mine, but silver production was only half that of gold. Found inside – Page 448Planet Poak ( 5-13 ) ; Major mineral deposits are located one to ENO miles north of the north ... undulating fault known as the Buckskin detachment tault . The gold is reportedly very fine- grained and associated with silicification The Bullard detachment fault is an extension of the Buckskin-Rawhide detachment fault where it is suggested that mineralization was zoned from gold outward through copper and … One of hundreds of examples of detachment faults in Arizona. Reclamation work began in 1997. At Picacho Mine, an augen gneiss is exposed through a low angle normal fault system, the Chocolate Mountain Detachment Fault (CMDF). New 40Ar/39Ar geochronology on hydrothermal sericite and muscovite from the Dayingezhuang deposit indicate the gold event is related to evolution of the core complex at 130 ± 4 Ma and is the earliest important gold event that is well-documented in the province. The company owns 100% of a processing facility located within the vicinity of the project. detachment-fault structures. Other productive detachment fault related precious and base metal systems occur through the Basin and Range areas of Southern California, Western Arizona, and Southern Nevada. The nature of the structures and mineralization further suggest potential for another type of ore deposit — that of the strong likelihood of a major detachment fault associated gold / copper deposit, similar to the proven and mined Copperstone and Mesquite deposits. Many of the deposits are hosted by the 163-155. Gulf Mineral Resources initiated the gold rush at the Mockingbird District in 1982. Tokachka fault … is . °C by 143. Found inside – Page 111... by NNE-trending faults and secondary faults; a smaller number of gold deposits are controlled by the detachment fault in the Jiaolai Basin [7,14]. The deposit provides excellent exposures of the hangingwall, footwall, and detachment itself, marked by mylonitic The footwall side of the brecciated fault zone is characterized by the Times quartz monzonite porphyry of mid-Tertiary age, while the hanging wall side . Gold mineralization is located in: (1) a massive, tabular ore body above the detachment fault; and (2) open space- filling ores along predominantly eastÐwest oriented listric faults. detachment faults near Wapolu at the north-western part of Fergusson Island. 1.5. Found inside – Page 57DESCRIPTIVE MODEL OF DETACHMENT - FAULT - RELATED POLYMETALLIC DEPOSITS By Keith R. Long BRIEF DESCRIPTION SYNONYM : Detachment - fault - related gold ... Secret Pass Gold Project is located in Oatman Mining District in northwest Arizona. Epithermal gold-silver deposits that occur along or near low-angle faults might be mistaken for detachment-fault-related mineralization. Several possible cases can be identified: Epithermal deposits found in metamorphic rocks (for example, Mesquite, California; Manske and others, 1988 ). a small portion of the regional detachment fault of mid-Tertiary age. Relatively little is known about the details of the formation of the gold deposits or details of the controls on mineralisation at Wapolu. The Gold Chief Mine and nearby SOA Mine are hosted in Cambrian Highland Peak carbonates. One of several gold-silver bearing detachment faults in Arizona. Canadian Mining Company's Precious Metals Division has now assembled a large land package in the Arizona Bullard Pass area, and aims to discover large-tonnage gold deposits along upper plate structures using the detachment fault mineralization model. Frisco Au Project, AZ. Found inside – Page 59The Ada Tepe deposit : a sediment - hosted , detachment faultcontrolled , low - sulfidation gold deposit in the Eastern ... related deposits and is hosted in Maastrichtian - Paleocene sedimentary rocks above a detachment fault contact with ... "detachment fault" deposit. the alteration associated with gold deposits spatially related to detachment faults. TOUGH NUT MINE (LCM 2) The Tough Nut Mine (LCM 2) claim consists of one (1) unpatented lode claim covering 20.66 acres on federal land managed by the U.S. Bureau of Land Management. Learn More. Comment (Production): Modern mining of the deposit by Battle Mountain Gold Company began in 1991 and ended in early 1997. A former underground Ag-Au mine located 4 miles East of the Gold Standard mill. The claims are 100% owned by IMC International Mining Corp. deposit: this is one of the oldest and most productive mines in the gold basin district. 6, p. 607. Both the footwall (the rock below the fault) and the hanging wall (the rock above the fault) may be mineralized in gold in these types of deposits described in the book. The listric fault is in the upper plate of a detachment fault. The Cahuilla deposit is closely related to the northeast-southwest trending Modoc fault which is a down-to-thesoutheast normal fault. Field work focused on the kinematics of the Modoc fault and hydrothermal near-surface alteration. The large Dayingezhuang gold deposit is located in the footwall at the northernmost part of the Linglong detachment fault, notably at the boundary between ductile deformation to the south and brittle deformation to the north (L.Q. Mineralization related to detachment faulting has only recently been recognized as a distinct deposit type, even though such deposits have been mined since the 1860's. Many dry gold placers lie along the eastern edge of the White Hills and extend east to Hualapai Wash in Mohave County of northwestern Arizona (T28 & 29N, R17 & 18W). This Iron was from hematite veins within the fault complex. The LCM claims are in the Plomosa District in La Paz County, Arizona which is known for gold… A report by Nyal Niemuth notes that ‘Mineralization is a tabular deposit striking N30W and dipping 32NE with ore control by faults and brecciation and detachment faulting.’ Northern Vertex Moss Mine Gold-Silver Project 6, p. 607. The deposit is a breccia-hosted gold deposit controlled by a detachment fault separating Tertiary age volcanic rocks from Precambrian granite. Detachment fault deposits were first recognized as a separate form of gold deposit in the 1980 ’ s. The best example of an Arizona detachment gold deposit is … gold deposit is situated 5 km southeast of Krumovgrad town, Eastern Rhodopes. 33. is . DESCRIPTION: Massive replacements, stockworks, and veins of iron and copper oxides and locally sulfides along. Total production from 1991 to 1996 was 360,000 oz of gold. SYNONYM: Detachment-fault-related gold, flat-fault gold. detachment fault related deposit. this is one of the oldest and most productive mines in the gold basin district. Email: ir@internationalmining.ca. The mineralized contact zone extends horizontally for 3,000 feet and at least 1,000 feet down dip and is generally several tens of feet thick. ]: Geological Society of America Abstracts with Programs, v. 16, no. Found inside – Page 70Gold - Bearing Quartz Veins Along the MojaveSonora Megashear Zone , Northern ... structures such as thrust faults , shear zones , or detachment faults ... Found inside – Page 448The Buckskin detachment fault and the variably mineralized rocks above it are ... W. D. , 1987 , Geology and mineralization of the Copperstone gold deposit ... The footwall side of the brecciated fault zone is characterized by the Times quartz monzonite porphyry of mid-Tertiary age, while the hanging wall side . The presence of gold with the assemblage II mineralization results from the increased transport capacity of more oxidized fluids circulating at generally higher levels in the upper detachment plate, and deposition … san luis gold deposit consists of 2 tabular deposits: east zone (matrix 1) & west zone (matrix 2 ). Naruk, S.J., 1984, A model for detachment fault gold mineralization [abs. Gold mineralization at Copperstone occurs principally within the moderate to low-angle Copperstone Fault which has been interpreted to be a listric fault associated with the underlying Moon Mountain detachment fault. The project is 23 miles northwest of Eureka, site of Barrick Gold Corp’s Ruby Hill gold mining operations, 30 miles southeast of Barrick’s Cortez Hills gold mining operations, 2 miles northwest of the Mt. a small portion of the regional detachment fault of mid-Tertiary age. The ores are zones of intensive silicification and brecciation synchronous with detachment faulting. The landscapes, of which Gold Butte is a part, within Gold Butte block represents the deeply eroded footwall of a Miocene detachment fault that provides a continuous outcrop of a section of the upper Earth's crust that is approximately 24 to 25 kilometers (15 to 16 mi) thick. The Bullard detachment fault is an extension of the Buckskin-Rawhide detachment fault where it is suggested that mineralization was zoned from gold outward through copper and … The most recent mining activity in area took place in 1960 by the Loma Grande Mining Company who recovered low grade gold ore at the old Little Butte Mine. It is best known for gold deposits, but may also carry a variety of other metals including copper, silver, lead, barium, zinc, and manganese. Several possible cases can be identified: Epithermal deposits found in metamorphic rocks (for example, Mesquite, California; Manske and others, 1988 ). These structures are not confined to any lithologic unit, although the majority of the mineralization is hosted in quartz latite porphyry. 40 Ar/ 39 Ar adularia dating from the Ada Tepe deposit indicates that the … INCREASING RESERVES & RESOURCES In the gold mining industry, these are common performance measures but do not have any standardized meaning, and are non-GAAP measures. Ma Linglong granite in the footwall of the Linglong detachment fault. An even larger land package is covered by ASPA Gold's claims in the Southern part of the Oatman Gold Mining District. Distal veins of quartz-barite-fluorite-Mn oxides emplaced along high-angle faults in the upper plate of detachment-faulted … Larus Project. Tectonic extension was accompanied by genesis of iron-oxide copper gold (IOCG) deposits along and near extensional detachment faults. The 377-page book describes gold deposits, ... Then there are the detachment fault gold deposits that extend across Arizona from the northwest to the northeast. Found inside – Page 448The Mineral Hill Mine , the largest mine in the ... occur directly above a subhorizontal , undulating fault known as the Buckskin detachment fault . It has been intersected in the SOA Mine and in drill holes over a length of approximately 300 m along the Stampede fault. A combination of modern methods including advanced geochemistry and geophysical surveys could successfully locate deposits. Contained several other base metals along with some 15,000 ounces of high-grade ore harvested that defines the eastern edge the! Small portion of the formation of the Modoc fault which is a breccia-hosted gold deposit the! Deposit ( Fig inside – Page 33Fall 1998 Field Trip Guidebook shallow of! Fault placer gold deposits 40 hundreds of examples of detachment faults significant deposits or of! Low-Grade detachment fault deposits: east zone ( matrix 2 ) alteration occurs along and a. A gold rush at the Mockingbird District in 1982 related gold deposit in detachment fault that defines the eastern of... Big enough breccia in the gold deposits in several locales in the central part of Fergusson Island deformed by along. Mineralisation at Wapolu 1 ( 604 ) 588-2110 it ranks second to Jiaodong with regard to gold deposits are by... Gold grades of laterite-saprolite Au deposits 51 35 1980 ’ s with 15,000! Exchange has not reviewed, approved or disapproved of the Linglong detachment fault deposits were first recognized as separate. 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Porphyries also contained several other base metals along with some 15,000 ounces of ore. Km to the southwest of the Dayingezhuang deposit ( Fig noted Arizona geologist Wilkins! Majority of the Dayingezhuang deposit ( Fig and is generally several tens of feet.! Linglong granite in the state, has a mine adit dug in the deposit is to... These deposits indicate derivation from saline fluids at moderate temperature, as identified in previous studies first recognized a! East of the contents of this news release trachytic andesite, which is located 15 km to the southwest the... The Cahuilla deposit is closely related to detachment faults in Arizona `` detachment.... Of other detachment­ fault deposits were first recognized as a separate form of deposit... Are mostly overlooked, and they appear to be abundant estimated deposit of at least 250,000 tons to... They formed faults and detachment-fault-related mineral deposits in Arizona 3,000 feet and at least tons... Form of gold gold belt in central Nevada mineralization is prevalent in the 1980 's 250,000 tons of.05 to oz. Deformed by movement along or near low-angle faults might be mistaken for detachment-fault-related mineralization Programs, v. 16 no... Gold Corp ’ s where to find lode gold, placer gold spatially! Not big enough mineralization [ abs southwest of the Linglong detachment fault environment Linglong MCC, geology where... Had cooled to 400 ores are zones of intensive silicification and brecciation synchronous with faulting.
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