INnovative EXplorations

Totally Committed to Excellence in Theoretical

and Applied Science Disciplines

Mansker Cable Jig – Kimberlite/Diamonds - Precious Metals 

Research and Development - Environmental

William L. Mansker, Ph.D.


INnovative EXplorations (INEX) provides consulting and technical services in physical science disciplines. Our primary focus (i.e., "bread & butter") is summarized in the following narratives.

We are constantly expanding our professional acumen to keep abreast of (and contribute to!) emerging innovative technologies and concepts. We adhere to professional precepts that elude many modern Total Quality Management firms . . . we are simply and (doggedly!) Totally Committed to Excellence (TCE) in our professional endeavors. INEX was established in 1984 as a small business consulting firm and we continue to enjoy professional and personal satisfaction [with little need for a marketing budget!] because we consistently meet and exceed our clients' expectations.

Being a small firm with very little "administrative inertia" we can rapidly respond to client needs and tackle challenging projects that might leave our competition quaking in their boots! Engaging INEX ensures timely, economical, and professional resolution of your technological needs. But, enough about INEX . . . contact us and let's talk turkey!

Snail mail:
INnovative EXplorations
8704 Gutierrez NE
Albuquerque, New Mexico
USA 87111

Ph:  (505) 239-9951
Fax: (505) 292-0805


Areas of Expertise

1. Mineral Exploration
(precious metals, diamonds, industrial minerals, oil & gas)

2. Environmental Compliance
(hazwaste, discharge plans, permiting, RI/FS, EA/EIS, NEPA, UST, remediation)

3. Research and Development
(innovative concepts & tools to fit specific needs)

4. Expert Testimony
(exploration, mining, rights, hydrology, contaminant fate transport, deponent analysis)

5. W.L. Mansker Summary


For further information E-mail:


1.      Mineral Exploration 

INEX provides geologic and technical support for all types of mineral exploration. Dr. Mansker has over 20 years experience in the utilization of traditional and innovative exploration and evaluation methodologies that are applicable to diamond/kimberlite, precious metals, industrial minerals, and oil and gas exploration. Exploration services include property submittal evaluations, claim staking and property testing/development, design and implementation of exploration programs for diamonds, precious and base metals, industrial minerals, and oil & gas, and property searches/acquisitions/negotiations. INEX welcomes opportunities to conduct grassroots exploration programs and tracking of competitive activities.

Recent INEX projects include exploration for garnet resources and epithermal gold deposits in New Mexico, zeolite deposits in the northwestern U.S., new areas of potential kimberlite/lamproite in the U.S. west and midcontinent, contract evaluation and microanalysis of kimberlite/lamproite indicator minerals, radon geochemical anomalies associated with epithermal systems and deep petroleum reservoirs, LANDSAT and TM signatures and physical features associated with potential mineral resources.

INEX provides contract heavy mineral sampling utilizing the patented, field portable Mansker Jig . The jig is used in the field to separate heavy minerals from alluvial, loam, and till samples, primarily in the search for diamonds and precious metals. The jig has also proven useful in the recovery of zircons for age dating research, glacial till correlations, and mineral fluid process and flotation testing.

Although INEX cannot guarantee every client a diamond mine, a gold mine, or a gusher - - we ARE diligent, dedicated, and determined - - and if we can't find it, it's probably not there!

An old prospector's advice: "It may not pay to look for diamonds . . .but, it always pays to pick them up when you find them!"

2.      Environmental Compliance

INEX provides a full spectrum of environmental services in the private and public client sectors. INEX services in these sectors include: site characterizations and corrective actions; hazwaste management and site remediation; hydrogeology and hydrogeochemistry; ASTM Standard Phase I and II Environmental Site Assessments; Underground Storage Tanks; NEPA investigations (EA/EIS); TSCA corrective actions; CERCLA, Superfund, FIFRA, and RCRA; Solid Waste Management (site investigations, closure plans, and monitoring).

INEX has managed numerous projects involving response and corrective actions related to hazardous waste releases. Innovative and site specific remediation technologies have been designed and successfully implemented at several petroleum contamination (UST) sites that have achieved site closure (below regulatory action levels) in 1 - 3 years.

Environmental support for the extractive industries includes preparation of ground water discharge plans, NPDES permit applications and BDAT storm water management design, process design and management, regulatory liaison, site characterization and corrective action, reclamation design and implementation, NEPA EA/EIS studies. INEX currently provides complete environmental compliance services for several mining and petroleum clients.

INEX does not advocate eco-mania . . . we are simply one of the best providers of environmental services.  We maximize the potential for responsible development, or resolution, of environmental risks.

3.      Research and Development

INEX and Dr. Mansker actively pursue applied research and development to produce technologies and devices that timely and cost-effectively resolve project specific issues or generally promote technological advancement. INEX manufactures and sells the patented the Mansker Jig (aka Cable Jig). This product is a portable (11.5 lbs!) 12 vdc mechanized device for reliably separating heavy minerals from granular mixtures based on relative specific gravity. The jig has been utilized in diamond and precious metals exploration programs and is in use throughout the world (e.g., United States, India, Peru, Australia, South Africa, Botswana, South America, Kyrgyzstan, Russia, and Canada). The jig is manufactured in-house and solely-distributed by INEX.

INEX has also developed proprietary methods and devices to support environmental projects. These include: an intertial monitor well development pump (one moving part!), methodologies for in situ direct measurement of soil air permeability and ground water aquifer transmissivity, an inexpensive (and disposable) electronic water level indicator, an inexpensive submersible monitoring well development/sampling pump, and inexpensive direct-push system subsurface soil and ground water samplers. INEX ideas develop in response to recognition of problems requiring solutions, identification of affective processes, and a fertile imagination. INEX's recipe for creativity and invention evolves from basic curiosity of systems, a tinkerer mentality, and a healthy level of laziness (there is always an easier way!).

4.      Expert Testimony

INEX supports plaintiff and defendant actions by offering technical and professional expertise in areas of mining and environmental compliance. INEX can respond as a factual authority, or as a client advocate, depending upon specific requirements of counsel. Dr. Mansker has testified as an expert witness in State and Federal Court actions involving private property rights, polychlorinated byphenol (PCB) soils contamination, chlorinated hydrocarbon soil and ground water contamination, petroleum contamination, and site worker injury/health and safety.

5.      Summary of W. L. Mansker’s Expertise

Bill Mansker received his Bachelor's and Master's degrees in Geology from the University of Missouri (Columbia). He earned his Ph.D. in Geology from the University of New Mexico (1979). He has focused on kimberlite/diamond and precious metals exploration, regulatory compliance, and applied research and development. Dr. Mansker was a project geologist for a major US/Canadian minerals exploration company and was in charge of kimberlite, lamproite, and diamond exploration programs throughout the U.S. Notably, Dr. Mansker was responsible for discovering new kimberlites in the midwestern and western U.S. and his target evaluations discovered the first two diamonds to be found in a Kansas kimberlite. His expertise includes design, implementation, and evaluation of bulk sampling programs and indicator mineral, geochemical, geophysical, and remote sensing surveys. He helped develop an innovative and reliable visual field technique for quickly prioritizing heavy mineral suites to recognize pyrope garnets of kimberlite affinity (G-9) and diamond cognate (G-10) affinity. He also developed and patented the portable (11.5 lbs!) Mansker Jig (aka INEX Cable Jig) for rapid and economic concentration and isolation of heavy mineral suites in alluvial, loam, and till sampling programs. Utilizing these combined methods (portable jig and visual prioritization), exploration geologists can sample and evaluate heavy mineral indicators in the field and quickly prioritize indicators for confirmatory microanalysis.

Dr. Mansker has explored and evaluated diamond, precious metals, and industrial minerals properties in Arizona, New Mexico, Colorado, Minnesota, Michigan, Kansas, Kentucky, Tennessee, Missouri, Georgia, West Virginia, Arkansas, Idaho, Nevada, Washington Wyoming, and Oregon. His successful exploration efforts include discovery of new kimberlites (and diamonds!) in the midwestern U.S., discovery of a moderate-sized epithermal gold deposit in southwestern Utah, and discovery of a unique (but subeconomic) hydrothermal gold deposit in a bedded zeolite host.

Dr. Mansker's expertise includes application of innovative exploration technologies to oil and gas exploration. He has utilized in situ time-integrating radon and equilibrium soil radium signatures to successfully delineate productive targets. This technology has also shown promising results in tracing hydrothermal and geochemical halos associated with epithermal gold deposits.

Dr. Mansker has effectively applied his exploration experience in environmental and regulatory compliance sectors, based on the on the philosophy that subsurface environmental contamination is nothing more than a "man-made" deposit that is beneficiated by appropriate remediation technologies; likewise, an ore deposit is nothing more than a naturally-occurring hazardous waste volume that is best remediated by mining.

Selected Publications: (Request reprints via email at: wlminex@msn.com)

MANSKER, W.L., 1973, Petrology of a southeast Missouri kimberlite (Abstract) Proc. Geol. Soc. Amer. Annual Meeting, Dallas Texas

MANSKER, W.L., D. Brookins, G. Landis and J. Husler, 1976, Post-Devonian diatremes in southeast Missouri; Investigation of the Avon kimberlite and some emplacement parameters (Abstract) EOS, Vol 57, No. 10, p. 761

MANSKER, W.L., R. Ewing and K. Keil, 1979, Barium-titanium biotites in nephelinites from Oahu, Hawaii, Amer. Mineral. Vol. 64, Nos. 1 and 2, p. 156-159

MANSKER, W. L. , K. Keil and G. Bauer, 1979, Xenolith disaggregation and nephelinite petrochemistry in the Honolulu Volcanic Series, Oahu, Hawaii (Abstract) Hawaiian Symposium on Intraplate Volcanism and Marine Volcanism, Hilo, Hawaii

Connolly, J.R., W. MANSKER, R. Hicks, C. Allen, J. Husler, K. Keil and A. Lapin, 1983, Petrology and geochemistry of the Grouse Canyon Member of the Belted Range Tuff, Rock-mechanics Drift, U12g Tunnel, Nevada Test Site, Sandia National Laboratories, Sandia Report SAND8101970-UC70, 72 pp

Berendsen, P., R. Cullers and W. MANSKER, 1985, Late-Cretaceous kimberlite and lamproite intrusions in Kansas (Abstract) Proc. Geol. Soc. Amer. Regional Meeting (south-central), Fayettville, Arkansas

MANSKER, W.L. B. Richards and G. Cole, 1985, A note on newly-discovered kimberlites in Kansas (Abstract), Symposium on Akalic and Related Rocks, Proc. Geol. Soc. Amer. Regional Meeting (south-central), Fayetteville, Arkansas

Springfield, J.T., W. MANSKER and K. Keil, 1985, Factors affecting garnet metamerism - applications in kimberlite evaluation/exploration (Abstract) Proc. Geol. Soc. Amer. Regional Meeting (south-central), Fayetteville, Arkansas

Brookins, D.G. and W. MANSKER, 1985, Upper mantle and crustal rocks in north-central Kansas; Evidence from kimberlites (Abstract), 6th International Conference on Basement Tectonics, Vol. 6, International Basement Tectonics Association, Santa Fe, New Mexico

MANSKER, W.L., J. Springfield and K. Keil, 1986, Kimberlitic garnets: Metamerism related to composition, in Microbeam Analysis - 1986, Proceedings of the 21st Annual Conference of the Microbeam Analysis Society, A.D. Romig and W.F. Chambers, eds., San Francisco Press, Inc., p. 670-673

MANSKER, W.L., 1986, Garnet suites in U.S. kimberlites and lamproites, in Microbeam Analysis - 1986, Proceedings of the 21st Annual Conference of the Microbeam Analysis Society, A.D. Romig and W.F. Chambers, eds., San Francisco Press, Inc., p. 169

MANSKER< W.L., B. Richards and G. Cole, 1987, A note on newly-discovered kimberlites in Kansas, Geol. Soc. Amer. Spec. Paper No. 215, p. 197-204

MANSKER, W.L., 1987, Radionuclide anomalies in geologic exploration (Abstract, Poster Session, Panel Participant), Geologic Causes of Radionuclide Anomalies (GEORAD) Conference, Mo. Dept. of Natural Resources and U.S. Geol. Surv., St. Louis, Missouri

MANSKER, W.L., and D. Brookins, 1989, Geologic factors affecting radionuclide disequilibrium in alpha-gamma measurements (Abstract) Second Annual Hazardous Waste Conference and Exhibition, Albuquerque, New Mexico

MANSKER, W.L., 1989, Applied radon geochemistry to oil and gas exploration (Abstract and Poster Session) AAPG-SEPM-EMD Rocky Mountain Section Meeting, Albuquerque, New Mexico

Rogers, M.A., W. MANSKER and D. Peters, 1991, Potential for environmental threats in old mining area - the High Rolls (Sacramento) Mining District, 1991 New Mexico Geol. Soc. Guidebook

MANSKER, W.L., D. Cortese and B. Hovda, 1995, Ex-situ sparging and bioenhanced remediation of gasoline-contaminated ground water, New Mexico Environment Department, Underground Storage Tank Bureau Bioremediation Conference (Abstract) Tank Notes, Summer 1995, Vol. 8, No. 2

Tips for Successful Diamond Exploration

General Tips

Satellite, high and low altitude aerial recon and topographic map assessment are preliminary targeting tools. Crater facies (tuffisitic, epiclastic) and most diatreme facies kimberlite and lamproite tend to weather in negative topographic relief. Look for unusual topographic expressions, such as circular or elliptical lakes, perennial ponding in linear drainages, and normal drainages that "bell-out" within otherwise normal ( e.g., narrowing upstream) drainage development. Cores of more resistant diatreme or hypabyasal facies or dikes may form a smaller positive relief element within a larger negative relief. Regional aeromag also provides primary targeting of potential targets. Look for magnetic lows north adjacent to magnetic highs ("bull's eyes") over pipe-like structures - the mag low will tend to overlap with the high (steeper magnetic dipole) at higher latitudes. Profile (N to S) suspect targets using a portable field magnetometer and obtain reasonable-sized subsurface loam or alluvial samples from the approximate center of the target, or immediately "down-ice" if till-covered; shallow exploratory soil drilling may be required. Process loam and/or alluvial samples to recover heavy minerals; evaluate for kimberlite and lamproite indicators.

Alluvial Sampling Tips

Always conduct a pilot sampling program to determine the size range of the heavy minerals (HM) of interest. A typical pilot study will process 200 - 400 Kg at one or more sampling sites that are representative of expected site conditions. Entire pilot samples should be processed for recovery of all HM in the range 10 - 100 mesh. Samples should be assessed to determine the actual size range pre-screening interval to be used for subsequent sampling and processing.

Kimberlite indicators are usually found in the 20 - 35 mesh size range. Lamproite indicators are usually found in the 35 - 100 mesh range.

If possible, field-prewash samples in an open container to minimize sample weight/volume and reject clays and organic materials - repeated forceful washing followed by approximately 10 seconds for settling, then decant and discard fines.

In addition to indelible sample container labeling, place an annotated "write-on" aluminum sample ID tag inside the container; and securely seal the container. If using poly-bags, "double-bag" each sample.

Kimberlite HM Concentrates Available

INEX has accumulated a large collection of HM concentrates from most U.S. kimberlites - most of these (6800 lbs) are in the Mansker Research Collection housed at the American Museum of Natural History; a listing will be provided by INEX on request. Unpublished microprobe data are available for indicators from many of these concentrates. Other published and unpublished microprobe data from other sources are also available. INEX can provide Cr/Ca data plots for garnet data and some plots for other indicators. A sample plot will be provided on request. INEX will donate representative small splits of HM concentrates to interested parties.  HM Suites of 45-50 locations are available for $400.00 USD, plus shipping.  Please inquire via phone (505) 239-9951 or email wlminex@msn.com.


Field-portable Mansker Cable Jig

The Mansker Jig is a uniquely-designed (patented) precision heavy mineral concentrating device. Compact and lightweight (5.25 kg), yet rugged, construction affords extreme portability for a variety of remote field and laboratory applications. Operating as a 'vertically-oscillating, moveable screen' jig, the Mansker Jig offers reliable and consistent heavy mineral isolation with minimal operator proficiency. The Mansker Jig has been used for more than 10 years in areas of glacial, mountainous, and arid terrain throughout the world. The Jig has been successfully utilized as an exploration and testing tool in precious metals, base metals, tin, and diamond exploration programs.

Processing a typical batch sample (5 - 7kg, minus 10 mesh), using either a 35 or 60 mesh jig screen, produces a heavy mineral concentrate in approximately 7 minutes. The Jig will also process large volume samples in a continuous mode so long as the feed hopper is refilled and heavy minerals volume does not exceed the jig screen capacity. Undersize material (important for lamproite and gold) may be reprocessed utilizing a finer mesh jig screen [Note: Theoretical limit for jig concentration is about 300 - 400 mesh; practical limit is about 200 mesh.] For reprocessing limited undersize volumes, the Jig utilizes an optional 3" diameter sieve adapter. The Mansker Jig product is a filled jig screen (standard half-height testing screen) (the 'cake'), which when inverted yields an 'eye' of heavy mineral (HM) concentrate. Within the HM 'eye', higher sp. gr. minerals are near the center and relatively lower sp. gr. minerals radiate concentrically outward. HM species of interest (or the entire 'eye') are extracted and retained for further evaluation. INEX ships the Mansker Jig in a heavy duty, rugged field case that may be utilized as a sample processing tank. The Jig is typically operated in one half of the field case containing about 6 - 8 gallons of water. Tailings are periodically removed from the processing tank and the process water can be continually reused.


The Mansker Jig has been utilized in minerals exploration, online process testing, and laboratory research. Jig has been used quite successfully for diamond exploration. It is a time and cost effective tools for rapidly concentrating HM in alluvium, till, and loam samples. The Jig has also been used in base and precious metals exploration programs in South America, Canada, and the U.S. to enhance geochemical anomalies and evaluate micronugget effects. The Mansker Jig has also been used by the U.S. Geological Survey and Los Alamos National Laboratories to isolate zircons and galena for fisson-track and isotopic studies.  

The Jig is a powerful field tool for quickly evaluating collected samples for kimberlite and lamproite indicator minerals. Used in conjunction with a keen geologic eyeball, key indicators (e.g., eclogitic and peridotitic G-9, G-10 pyropes) can be evaluated and prioritized in the field for immediate target follow-up (visit other webpage links). NWT kimberlite and lamproite exploration programs, that resulted in significant diamond discoveries, have employed the Mansker Jig.

Mansker Jig Specifications

Dimensions: 13" x 12" x 20"
Weight: 5.25 kg (11.5 lbs) Power: 12 vdc, 0.7 amps
Leveling: Triangular array of adjustable leveling screws
Jig Screen: Standard 8" diameter, HH, Brass frame, Stainless cloth testing sieves
Optional: 3" HH testing sieve and adapter)                                                
Capacity: Optimum 68 kg/hr (150 lbs/hr), minus 10 mesh
Recovery: Increases with > sp. gr.; 95-99% @ 3.5 g/cc, >99% @ 8.0 g/cc
Availability: 4-6 wks                                                                                 
Includes: Jig/Case/Acc. Kit/Oper. Manual

                       For additional images, email wlminex@msn.com. 




$1,850.00 (USD) + Shipping



Base & Precious Metals/Diamonds/Minerals

Geochem/Geophysics/Remote Sensing/Mineralogy

Property/submittal evaluation/JV Negotiations

Standard Consulting Fees $500.00/day

Does not include travel, lodging, per diem, etc.

Design/Plan/Budget/Manage/Review Projects/Consultation/Field


(Per Sample Basis) As Indicated (Up to 40 Kg Raw Sample)

Cable Jig Concentration of Heavy Minerals $150.00

to 60 Mesh. Return HM to Client.  Discard/Return Tailings as per client request. 

Preliminary Microscopic Evaluation of HM Indicators; $130.00

Isolation of HM species of interest; Descriptive Report

Metameric Categorization and Prioritization of G9-G10 Garnet Species $100.00



Prices/Fees/Costs do NOT include shipping/tariffs/applicable taxes.

All Prices/Fees/Costs subject to annual update
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Excellence:  The exceptional quality to exceed expectations!